Crotaphytus insularis VAN DENBURGH & SLEVIN, 1921
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Crotaphytus insularis
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| Higher Taxa | Crotaphytidae, Iguania, Sauria, Squamata (lizards) |
| Subspecies | |
| Common Names | E: Eastern Collared Lizard S: Cachorón de Collar Negro |
| Synonym | Crotaphytus insularis VAN DENBURGH & SLEVIN 1921 Crotaphytus collaris insularis — SOULÉ & SLOAN 1966 Crotaphytus insularis insularis — SMITH & TANNER 1972 Crotaphytus insularis insularis — SMITH & TANNER 1974 Crotaphytus insularis — STEBBINS 1985: 121 Crotaphytus insularis — LINER 1994 Crotaphytus insularis — HEIMES 2022 |
| Distribution | Mexico (Baja California: Angel de la Guarda Island) Type locality: Angel de la Guarda Island, 7 miles north of Pond Island, Gulf of California, Baja California |
| Reproduction | oviparous |
| Types | Holotype: CAS 49151 |
| Diagnosis | Diagnosis: Crotaphytus insularis can be distinguished from all other Crotaphytus by the slender and elongate nasal process of the premaxilla and its dorsal pattern of elongate white dashes, some of which may form thick, wavy transverse lines. It can be distinguished from all Croraphytus except female C. rericulatus and occasional C. vestigium by the extreme reduction of the posterior collar in both sexes such that it is nearly always absent, and when present, it is extremely reduced. It can be distinguished from all but C. vestigium by the presence of extravomerine bones. It can be distinguished from allbutsomeC.vestigium(thosefromnorthofBahia de Los Angeles, Baja California) and some C. collaris by the presence in adult males of olive green ventrolateral coloration. It can be distinguished from C.reticulatus, C. collaris, C. ncbrius, and C. dickersonae by the absence of black oral melanin. It can be further distinguished from C.reticulatus, C. collaris, and C. nebritcs by the presence in adult males of a strongly laterally compressed tail, a white or off-white dorsal caudal stripe, a pale tan or white patternless region on the dorsal surface of the head, and enlarged dark brown or black inguinal patches (rather than the small inguinal patches of C. nebrius and some C.collaris).It can be further distinguished from C.collaris by the presence in adult males of dark brown or black pigmentation in the gular fold (= ventrally complete anterior collar). It can be further distinguished from C. grismeri by its forelimb and hindlimb patterns consisting of white reticulations on a brown field and the absence of a greenish tint in the white bar that separates the anterior and posterior collars. It can be further distinguished from C. reticulatus and from C. antiquus by the absence of the white dorsal reticulum characteristic of these species (McGuire 1996: 87). |
| Comment | Montanucci (1983) downgraded Crotaphytus bicinctores to C. insularis bicinctores but others revalidated it. Crotaphytus insularis is part of a natural group containing C. bicinctores, C. grismeri, and C. vestigium and is the sister species of C. vestigium (McGuire 1996). |
| Etymology | rom the Latin insula, island, and aris, pertaining to. In reference to the insular distribution of this species. |
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