Difference between revisions of "Island Night Lizards: San Clemente Island"

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'''Island Night Lizard''' (''Xantusia riversiana''), endemic to the California Channel Islands where it is found only on Santa Barbara Island and adjacent Sutil Rock, and on San Nicolas and San Clemente islands — islands lacking snakes. Undisturbed rocks and vegetative cover are important in providing shelter and refuge for this species. Individuals may live into their teens. Females do not mature sexually until their third or fourth year, and they reproduce only every other year. Island night lizards are larger than their cousin species of desert night lizards. About 30% of their diet consists of vegetable material. The San Clemente Island population is considered a recognized subspecies (ssp. ''reticulata''). Recent research indicates that Island night lizards have a very limited home range, and travel no more than 50 feet over a one-year period. Island Night Lizards are considered a threatened species.
'''Island Night Lizard''' (''Xantusia riversiana'') represents one of the most distinctive endemic vertebrates on California's Channel Islands. It is endemic to Santa Barbara Island and adjacent Sutil Rock, and on San Nicolas and San Clemente islands — islands lacking snakes. Undisturbed rocks and vegetative cover are important in providing shelter and refuge for this species. This medium-sized lizard (adults 75–110 mm snout-vent length) diverged from mainland relatives approximately 15 million years ago during the middle Miocene. Its evolutionary distinctiveness led scientists to originally classify it in its own genus, Klauberina.
 
The Island Night Lizard typically has a lifespan of 11 to 13 years, with many individuals living much longer, potentially over 30 years. They are slow-growing, sedentary reptiles. Females do not mature sexually until their third or fourth year, and they reproduce only every other year. Island night lizards are larger than their cousin species of desert night lizards. About 30% of their diet consists of vegetable material. Recent research indicates that Island night lizards have a very limited home range, and travel no more than 50 feet over a one-year period. Unlike most lizards, Island Night Lizards do not lay eggs but give birth to developed young in late summer through early fall. Newborn lizards are pale colored with bluish tinting and translucent ventral skin. This reproductive strategy, combined with their longevity and territorial behavior, contributes to relatively stable population dynamics even during challenging environmental conditions such as prolonged drought. In favorable habitats, they can reach extraordinarily high population densities, among the highest reported for terrestrial lizards anywhere in the world, with estimates reaching up to 4,000 lizards per hectare in prime cactus habitat.
 
The San Clemente Island population is considered a recognized subspecies (ssp. ''reticulata'').
 
Island Night Lizards are considered a threatened species.
 




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| San Clemente Island ||[[COOPER, James Graham|J. G. Cooper]]|| NMNH ||July 1861 ||USNM-16321|| ''Xantusia riversiana'' ||Herps
| San Clemente Island ||[[COOPER, James Graham|J. G. Cooper]]|| NMNH ||July 1861 ||USNM-16321|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||unknown - [[TOWNSEND, Charles Haskins|C. H. Townsend]]? || USNM||May 8, 1888||USNM-15166|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||unknown - [[TOWNSEND, Charles Haskins|C. H. Townsend]]? || USNM||May 8, 1888||USNM-15172|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||unknown - [[TOWNSEND, Charles Haskins|C. H. Townsend]]? || USNM||May 8, 1888||USNM-15173|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||unknown - [[TOWNSEND, Charles Haskins|C. H. Townsend]]? || USNM||May 8, 1888||USNM-15174|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||unknown - [[KOCH, F. W.|F. W. Koch]]? || USNM||July 29, 1893||USNM-21553|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island || [[TARR, H.B.|H. B. Tarr]] || MVZ||June 5, 1896||MVZ-43576|| ''Xantusia riversiana '' ||Herps
|-
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 15, 1912||CAS-35598|| ''Xantusia riversiana'' ||Herps
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 15, 1912||CAS-35598|| ''Xantusia riversiana'' ||Herps
Line 83: Line 102:
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 16, 1912||CAS-35663|| ''Xantusia riversiana'' ||Herps
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 16, 1912||CAS-35663|| ''Xantusia riversiana'' ||Herps
|-
|-
 
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 16, 1912||CAS-35664|| ''Xantusia riversiana'' ||Herps
 
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 16, 1912||CAS-35666|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 16, 1912||CAS-35669|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 16, 1912||CAS-35670|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 16, 1912||CAS-35672|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 16, 1912||CAS-35673|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 16, 1912||CAS-35676|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 17, 1912||CAS-35682|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 17, 1912||CAS-35685|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 17, 1912||CAS-35686|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 17, 1912||CAS-35687|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 17, 1912||CAS-35689|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 17, 1912||CAS-35691|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 17, 1912||CAS-35692|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 17, 1912||CAS-35693|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 17, 1912||CAS-35700|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 17, 1912||CAS-35701|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 17, 1912||CAS-35702|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 17, 1912||CAS-35703|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 17, 1912||CAS-35704|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 17, 1912||CAS-35705|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 17, 1912||CAS-35706|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || CAS||October 17, 1912||CAS-35707|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || MCZ||October 1912||MCZ R-9177|| ''Xantusia riversiana'' ||Herps
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || MCZ||October 1912||MCZ R-9177|| ''Xantusia riversiana'' ||Herps
|-
|-
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|-
|-
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || MCZ||October 1912||MCZ R-9182|| ''Xantusia riversiana'' ||Herps
| San Clemente Island ||[[SLEVIN, Joseph Richard|J. S. Slevin]] || MCZ||October 1912||MCZ R-9182|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 25, 1918||MVZ-7077 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 25, 1918||MVZ-7079 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 25, 1918||MVZ-7081 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 25, 1918||MVZ-7082 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 25, 1918||MVZ-7083 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 25, 1918||MVZ-7084 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 25, 1918||MVZ-7085 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 25, 1918||MVZ-7086 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 25, 1918||MVZ-7087 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 25, 1918||MVZ-7088 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 25, 1918||MVZ-7089 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 25, 1918||MVZ-7090 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || SDMNH ||March 25, 1918||SDMNH-11160 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43698|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43700|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43703|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43704|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43705|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43708|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43709|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43712|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43713|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43716|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43719|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43723|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43725|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43728|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43729|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43730|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43731|| ''Xantusia riversiana '' ||Herps
|-
| San
Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43732|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43734|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43737|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43741|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43745|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43746|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43749|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43751|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43756|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43758|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43759|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 25, 1918||CAS-43761|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43766|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43767|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43769|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43772|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43773|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43775|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43780|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43782|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43785|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43787|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43788|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43789|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43791|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43793|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43794|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43795|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43796|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43799|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43802|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43803|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43804|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43805|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43806|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 26, 1918||CAS-43810|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43812|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43814|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43815|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43818|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43820|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43822|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43824|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43825|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43827|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43828|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43829|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43830|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43831|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43834|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43839|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43843|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43844|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43846|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43847|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43849|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43850|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43851|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43852|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43853|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43854|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43855|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43856|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43856|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43857|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43858|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43859|| ''Xantusia riversiana '' ||Herps
|-
| San Clemente Island ||[[VAN DENBURGH, John|John Van Denburgh]] || CAS||March 27, 1918||CAS-43860|| ''Xantusia riversiana '' ||Herps
|-
|-
| San Clemente Island ||[[DIXON, Joseph Scattergood| J. S. Dixon]]|| MVZ ||April 17, 1920||MVZ-7355|| ''Xantusia riversiana'' ||Herps
| San Clemente Island ||[[DIXON, Joseph Scattergood| J. S. Dixon]]|| MVZ ||April 17, 1920||MVZ-7355|| ''Xantusia riversiana'' ||Herps
Line 106: Line 367:
|-
|-
| San Clemente Island ||[[DIXON, Joseph Scattergood| J. S. Dixon]]|| MVZ ||April 19, 1920||MVZ-7359|| ''Xantusia riversiana'' ||Herps
| San Clemente Island ||[[DIXON, Joseph Scattergood| J. S. Dixon]]|| MVZ ||April 19, 1920||MVZ-7359|| ''Xantusia riversiana'' ||Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 24, 1918||MVZ-7072 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 24, 1918||MVZ-7073 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 24, 1918||MVZ-7074 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 24, 1918||MVZ-7075 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 24, 1918||MVZ-7076 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 24, 1918||MVZ-7080 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 24, 1918||MVZ-7091 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 25, 1918||MVZ-7081 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 25, 1918||MVZ-7082 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 25, 1918||MVZ-7083 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 25, 1918||MVZ-7085 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 25, 1918||MVZ-7086 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 25, 1918||MVZ-7087 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||[[LAW, John Eugene|J. E. Law]] || MVZ ||March 25, 1918||MVZ-7089 || ''Xantusia riversiana''|| Herps
|-
| San Clemente Island ||L.A.C.M. FIeld Party || LACM|| April 1, 1939||LACM-14481|| ''Xantusia riversiana '' ||Herps
|-
|-
| San Clemente Island ||[[REDDICK, Theodore|Theodore Reddick]] || SDNHM|| April 30, 1939||SDNHM-31372|| ''Xantusia riversiana '' ||Herps
| San Clemente Island ||[[REDDICK, Theodore|Theodore Reddick]] || SDNHM|| April 30, 1939||SDNHM-31372|| ''Xantusia riversiana '' ||Herps

Latest revision as of 16:16, 25 February 2026


Island Night Lizard (Xantusia riversiana) represents one of the most distinctive endemic vertebrates on California's Channel Islands. It is endemic to Santa Barbara Island and adjacent Sutil Rock, and on San Nicolas and San Clemente islands — islands lacking snakes. Undisturbed rocks and vegetative cover are important in providing shelter and refuge for this species. This medium-sized lizard (adults 75–110 mm snout-vent length) diverged from mainland relatives approximately 15 million years ago during the middle Miocene. Its evolutionary distinctiveness led scientists to originally classify it in its own genus, Klauberina.

The Island Night Lizard typically has a lifespan of 11 to 13 years, with many individuals living much longer, potentially over 30 years. They are slow-growing, sedentary reptiles. Females do not mature sexually until their third or fourth year, and they reproduce only every other year. Island night lizards are larger than their cousin species of desert night lizards. About 30% of their diet consists of vegetable material. Recent research indicates that Island night lizards have a very limited home range, and travel no more than 50 feet over a one-year period. Unlike most lizards, Island Night Lizards do not lay eggs but give birth to developed young in late summer through early fall. Newborn lizards are pale colored with bluish tinting and translucent ventral skin. This reproductive strategy, combined with their longevity and territorial behavior, contributes to relatively stable population dynamics even during challenging environmental conditions such as prolonged drought. In favorable habitats, they can reach extraordinarily high population densities, among the highest reported for terrestrial lizards anywhere in the world, with estimates reaching up to 4,000 lizards per hectare in prime cactus habitat.

The San Clemente Island population is considered a recognized subspecies (ssp. reticulata).

Island Night Lizards are considered a threatened species.



Island Collections~
ISLAND COLLECTOR INSTITUTION DATE NUMBER SPECIMEN
San Clemente Island J. G. Cooper NMNH July 1861 USNM-16321 Xantusia riversiana Herps
San Clemente Island unknown - C. H. Townsend? USNM May 8, 1888 USNM-15166 Xantusia riversiana Herps
San Clemente Island unknown - C. H. Townsend? USNM May 8, 1888 USNM-15172 Xantusia riversiana Herps
San Clemente Island unknown - C. H. Townsend? USNM May 8, 1888 USNM-15173 Xantusia riversiana Herps
San Clemente Island unknown - C. H. Townsend? USNM May 8, 1888 USNM-15174 Xantusia riversiana Herps
San Clemente Island unknown - F. W. Koch? USNM July 29, 1893 USNM-21553 Xantusia riversiana Herps
San Clemente Island H. B. Tarr MVZ June 5, 1896 MVZ-43576 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 15, 1912 CAS-35598 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 15, 1912 CAS-35599 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 15, 1912 CAS-35600 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 15, 1912 CAS-35601 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 15, 1912 CAS-35603 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 15, 1912 CAS-35604 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 15, 1912 CAS-35607 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 15, 1912 CAS-35608 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 15, 1912 CAS-35609 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 15, 1912 CAS-35614 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 15, 1912 CAS-35615 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 15, 1912 CAS-35617 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 15, 1912 CAS-35618 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 15, 1912 CAS-35619 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 15, 1912 CAS-35620 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35623 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35628 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35629 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35631 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35633 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35634 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35642 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35644 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35648 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35650 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35652 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35653 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35654 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35658 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35660 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35661 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35662 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35663 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35664 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35666 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35669 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35670 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35672 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35673 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 16, 1912 CAS-35676 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 17, 1912 CAS-35682 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 17, 1912 CAS-35685 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 17, 1912 CAS-35686 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 17, 1912 CAS-35687 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 17, 1912 CAS-35689 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 17, 1912 CAS-35691 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 17, 1912 CAS-35692 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 17, 1912 CAS-35693 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 17, 1912 CAS-35700 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 17, 1912 CAS-35701 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 17, 1912 CAS-35702 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 17, 1912 CAS-35703 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 17, 1912 CAS-35704 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 17, 1912 CAS-35705 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 17, 1912 CAS-35706 Xantusia riversiana Herps
San Clemente Island J. S. Slevin CAS October 17, 1912 CAS-35707 Xantusia riversiana Herps
San Clemente Island J. S. Slevin MCZ October 1912 MCZ R-9177 Xantusia riversiana Herps
San Clemente Island J. S. Slevin MCZ October 1912 MCZ R-9178 Xantusia riversiana Herps
San Clemente Island J. S. Slevin MCZ October 1912 MCZ R-9179 Xantusia riversiana Herps
San Clemente Island J. S. Slevin MCZ October 1912 MCZ R-9180 Xantusia riversiana Herps
San Clemente Island J. S. Slevin MCZ October 1912 MCZ R-9181 Xantusia riversiana Herps
San Clemente Island J. S. Slevin MCZ October 1912 MCZ R-9182 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 25, 1918 MVZ-7077 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 25, 1918 MVZ-7079 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 25, 1918 MVZ-7081 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 25, 1918 MVZ-7082 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 25, 1918 MVZ-7083 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 25, 1918 MVZ-7084 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 25, 1918 MVZ-7085 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 25, 1918 MVZ-7086 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 25, 1918 MVZ-7087 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 25, 1918 MVZ-7088 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 25, 1918 MVZ-7089 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 25, 1918 MVZ-7090 Xantusia riversiana Herps
San Clemente Island J. E. Law SDMNH March 25, 1918 SDMNH-11160 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43698 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43700 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43703 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43704 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43705 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43708 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43709 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43712 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43713 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43716 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43719 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43723 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43725 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43728 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43729 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43730 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43731 Xantusia riversiana Herps
San 
Clemente Island ||John Van Denburgh || CAS||March 25, 1918||CAS-43732|| Xantusia riversiana  ||Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43734 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43737 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43741 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43745 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43746 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43749 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43751 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43756 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43758 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43759 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 25, 1918 CAS-43761 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43766 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43767 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43769 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43772 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43773 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43775 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43780 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43782 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43785 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43787 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43788 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43789 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43791 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43793 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43794 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43795 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43796 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43799 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43802 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43803 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43804 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43805 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43806 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 26, 1918 CAS-43810 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43812 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43814 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43815 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43818 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43820 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43822 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43824 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43825 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43827 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43828 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43829 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43830 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43831 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43834 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43839 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43843 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43844 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43846 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43847 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43849 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43850 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43851 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43852 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43853 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43854 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43855 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43856 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43856 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43857 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43858 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43859 Xantusia riversiana Herps
San Clemente Island John Van Denburgh CAS March 27, 1918 CAS-43860 Xantusia riversiana Herps
San Clemente Island J. S. Dixon MVZ April 17, 1920 MVZ-7355 Xantusia riversiana Herps
San Clemente Island J. S. Dixon MVZ April 17, 1920 MVZ-7356 Xantusia riversiana Herps
San Clemente Island J. S. Dixon MVZ April 17, 1920 MVZ-7357 Xantusia riversiana Herps
San Clemente Island J. S. Dixon MVZ April 19, 1920 MVZ-7358 Xantusia riversiana Herps
San Clemente Island J. S. Dixon MVZ April 19, 1920 MVZ-7359 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 24, 1918 MVZ-7072 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 24, 1918 MVZ-7073 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 24, 1918 MVZ-7074 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 24, 1918 MVZ-7075 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 24, 1918 MVZ-7076 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 24, 1918 MVZ-7080 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 24, 1918 MVZ-7091 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 25, 1918 MVZ-7081 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 25, 1918 MVZ-7082 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 25, 1918 MVZ-7083 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 25, 1918 MVZ-7085 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 25, 1918 MVZ-7086 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 25, 1918 MVZ-7087 Xantusia riversiana Herps
San Clemente Island J. E. Law MVZ March 25, 1918 MVZ-7089 Xantusia riversiana Herps
San Clemente Island L.A.C.M. FIeld Party LACM April 1, 1939 LACM-14481 Xantusia riversiana Herps
San Clemente Island Theodore Reddick SDNHM April 30, 1939 SDNHM-31372 Xantusia riversiana Herps
San Clemente Island Theodore Reddick SDNHM April 30, 1939 SDNHM-31373 Xantusia riversiana Herps
San Clemente Island Theodore Reddick SDNHM April 30, 1939 SDNHM-31374 Xantusia riversiana Herps
San Clemente Island Theodore Reddick SDNHM May 14, 1939 SDNHM-31472 Xantusia riversiana Herps
San Clemente Island Theodore Reddick SDNHM May 15, 1939 SDNHM-31477 Xantusia riversiana Herps
San Clemente Island Theodore Reddick SDNHM May 15, 1939 SDNHM-31478 Xantusia riversiana Herps
San Clemente Island Sam Hinton FMNH January 5, 1947 FMNH-48537 Xantusia riversiana Herps
San Clemente Island Sam Hinton FMNH January 5, 1947 FMNH-48538 Xantusia riversiana Herps
San Clemente Island Sam Hinton FMNH January 5, 1947 FMNH-48539 Xantusia riversiana Herps
San Clemente Island Sam Hinton FMNH January 5, 1947 FMNH-48540 Xantusia riversiana Herps
San Clemente Island Sam Hinton FMNH February 18, 1947 FMNH-48534 Xantusia riversiana Herps
San Clemente Island Sam Hinton FMNH February 18, 1947 FMNH-48535 (exchanged) Xantusia riversiana Herps
San Clemente Island Sam Hinton FMNH February 18, 1947 FMNH-48536 Xantusia riversiana Herps
San Clemente Island Sam Hinton FMNH February 18, 1947 FMNH-48573 Xantusia riversiana Herps
San Clemente Island J. R. Hendrickson RMB February 23, 1949 RMB-3609 Xantusia riversiana Herps
San Clemente Island C. F. Coil July 13, 1950 RMB-3607 Xantusia riversiana Herps
San Clemente Island C. F. Coil July 14, 1950 RMB-3608 Xantusia riversiana Herps
San Clemente Island C. F. Coil CM July 14, 1950 CM-64537 Xantusia riversiana Herps
San Clemente Island C. L. Remington YPM 1970 YPM-016575 Klauberina riversiana Herps
San Clemente Island C. L. Remington YPM 1970 YPM-016576 Klauberina riversiana Herps
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