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Elgaria cedrosensis (FITCH, 1934)

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Higher TaxaAnguidae (Gerrhonotinae), Diploglossa, Anguimorpha, Sauria, Squamata (lizards)
Common NamesE: Cedros Island Alligator Lizard
S: Lagarto de Isla Cedros 
SynonymGerrhonotus cedrosensis FITCH 1934: 6
Gerrhonotus cedrosensis — FITCH 1938
Elgaria cedrosensis — TIHEN 1949: 595
Elgaria cedrosensis — SMITH & TAYLOR 1950: 206
Gerrhonotus cedrosensis — WERMUTH 1969: 15
Elgaria cedrosensis — GOOD 1988
Elgaria paucicarinata cedroensis — LINER 1994: 47
Elgaria cedrosensis — GRISMER & HOLLINGSWORTH 2001
Elgaria cedrosensis — PIANKA & VITT 2003: 234 
DistributionMexico (Cedros Island, and coastal S Baja California Norte)

Type locality: Cañon on southeast side of Cedros Island, Baja California.  
TypesHolotype: CAS 56187 
DiagnosisDiagnosis: Fourteen longitudinal dorsal scale rows; ten dorsal rows of scales of weakly keeled on the body and eight dorsal rows weakly keeled on upper side of tail near its base; dorsal scales of neck smooth, temporals and occipitals smooth and rounded, scales on sides of body smooth; all scales on fore and hind limbs smooth; less than fifty transverse dorsal scale rows between ear and back of thigh (from Fitch 1934: 6). 
CommentElgaria cedrosensis fide GRISMER & HOLLINGSWORTH 2001 is an “evolutionary species”.

Distribution: see map in Leavitt et al. 2017: Fig. 1. 
EtymologyNamed after the type locality. 
  • Fitch, H.S. 1934. New Alligator lizards from the Pacific Coast. Copeia 1934 (1): 6-7 - get paper here
  • Fitch, H.S. 1938. A Systematic Account of the Alligator Lizards (Gerrhonotus) in the Western United States and Lower California. American Midland Naturalist 20: 381-424 - get paper here
  • Grismer, L. Lee and Bradford D. Hollingsworth 2001. A taxonomic review of the endemic Alligator Lizard Elgaria paucicarinata (Anguidae: Squamata) of Baja California, México with a description of a new species. Herpetologica 57 (4):488-496 - get paper here
  • Grismer,L.L. 1988. Geographic variation, taxonomy, and biogeography of the anguid genus Elgaria (Reptilia: Squamata) in Baja California, Mexico. Herpetologica 44: 431-439 - get paper here
  • Jones, L.L. & Lovich, R.E. 2009. Lizards of the American Southwest. A photographic field guide. Rio Nuevo Publishers, Tucson, AZ, 568 pp. [review in Reptilia 86: 84] - get paper here
  • Lais, P. Mike 1976. Gerrhonotus cedrosensis. Catalogue of American Amphibians and Reptiles (177): 1 - get paper here
  • Lais, P. Mike 1976. Gerrhonotus paucicarinatus. Catalogue of American Amphibians and Reptiles (188): 1-2 - get paper here
  • Leavitt, D.H., Marion, A.B., Hollingsworth, B.D., Reeder, T.W. 2017. Multilocus phylogeny of alligator lizards (Elgaria, Anguidae): Testing mtDNA introgression as the source of discordant molecular phylogenetic hypotheses. Molecular Phylogenetics and Evolution - get paper here
  • Peralta-García A, Valdez-Villavicencio JH, Fucsko LA, Hollingsworth BD, Johnson JD, Mata-Silva V, Rocha A, DeSantis DL, Porras LW, and Wilson LD. 2023. The herpetofauna of the Baja California Peninsula and its adjacent islands, Mexico: composition, distribution, and conservation status. Amphibian & Reptile Conservation 17(1&2): 57–142
  • Pianka, E.R. & Vitt, L.J. 2003. Lizards - Windows to the Evolution of Diversity. University of California Press, Berkeley, 347 pp. [review in Copeia 2004: 955] - get paper here
  • Stebbins,R.C. 1985. A Field Guide to Western Reptiles and Amphibians, 2nd ed. Houghton Mifflin, Boston
  • Tihen, J. A. 1949. The genera of gerrhonotine Iizards. American Midland Naturalist 41: 579-601 - get paper here
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