Xenosaurus penai PÉREZ-RAMOS, DE LA RIVA & CAMPBELL, 2000
Can you confirm these amateur observations of Xenosaurus penai?
Xenosaurus penai
Find more photos by Google images search: 
| Higher Taxa | Xenosauridae, Diploglossa, Anguimorpha, Sauria, Squamata (lizards) |
| Subspecies | |
| Common Names | E: Pena's Knob-scaled Lizard S: Xenosauro de Peña |
| Synonym | Xenosaurus penai PÉREZ RAMOS, DE LA RIVA & CAMPBELL 2000: 501 Xenosaurus penai — LINER & CASAS-ANDREU 2008 Xenosaurus penai — JOHNSON et al. 2017 Xenosaurus penai — NIETO-MONTES DE OCA et al. 2022 |
| Distribution | Mexico (Guerrero) Type locality: Cerro Yucuchinio, 1 km NW Cerro Pico del Aguila, 1735 m, southeastern Guerrero, México. Corrected to 16° 59 'N, 98° 19' W by PALACIOS-AGUILAR 2020. |
| Reproduction | ovoviviparous |
| Types | Holotype: CNAR (= UNAM = IBH) 6414, Instituto de Biologia, adult male |
| Diagnosis | Diagnosis: A species of Xenosaurus differing from all congeners, except X. rectocollaris, in having the posterior border of the nuchal collar extending transversely across the middle of the neck; in other species, the nape blotch extends posteriorly forming a V-shape, reaching to or past the level of the axilla. The dark dorsal bands in this species are fragmented into a conspicuous mottled pattern. The venter differs from that of X. platyceps, X. newnmanorum, and X. rectocollaris in having transverse series of dark scales extending almost to the midline. The supraorbital semicircles are separated by two scales (see variation in Table 1), whereas in other species the supraorbital semicircles are in broad contact (X. newmanorum) or only narrowly separated by a single scale, if at all (X. platyceps, X. grandis, X. rectocollaris). This species differs from all the other species, except some populations of X. grandis occurring on the Atlantic versant, in that the dorsal tubercles are widely scattered and are separated from each other by a distance of 2-4 times their diameter. The dorsal tubercles of X. penai are low and flattened, in contrast to other species in which the tubercles are conical and protuberant. The number of transverse rows on the belly is 33 whereas all other populations vary from 18-29. Xenosaurus penai conspicuously differs from X. g. agrenon, the geographically most proximate congeneric populations, in having a divided (versus single) postrostral, in having five (versus three) internasals, and in having the infralabials and sublabials in contact (versus separated) posteriorly. (Pérez Ramos et al. 2000) Unfortunately we had to temporarily remove additional information as this was scraped by multiple AI companies who sell that data. However, these details, e.g. detailed descriptions (about between half a page and a page) are available for collaborators and contributors. Please contact us if you need any of this material. |
| Comment | Distribution: see maps in WOOLRICH-PIÑA & SMITH 2012 and Nieto-Montes de Oca et al. 2022: 48 (Fig. 6). Abundance: only known from its original description (Meiri et al. 2017). |
| Etymology | Named after Zeferino Uribe Pena, in recognition of his significant contributions to the knowledge of the Mexican fauna. The species' name is a noun in the genitive case. |
| References |
|
| External links |