Xenosaurus rectocollaris SMITH & IVERSON, 1993
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Xenosaurus rectocollaris
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| Higher Taxa | Xenosauridae, Diploglossa, Anguimorpha, Sauria, Squamata (lizards) |
| Subspecies | |
| Common Names | E: Pallid Knob-scaled Lizard S: Xenosauro Pálido |
| Synonym | Xenosaurus platyceps SMITH & IVERSON 1993 Xenosaurus rectocollaris — LINER 1994 Xenosaurus rectocollaris — PÉREZ RAMOS et al. 2000 Xenosaurus rectocollaris — LINER & CASAS-ANDREU 2008 Xenosaurus rectocollaris — MATA-SILVA et al. 2015 Xenosaurus rectocollaris — NIETO-MONTES DE OCA et al. 2022 |
| Distribution | Mexico (N Oaxaca, S Puebla) Type locality: 2.5 Km (1.5 mi) SW Veracruz/Puebla state line. Hy 150 (8Km (4.9 mi) E Chapulco), Puebla, México; 2134 m (7000 ft) [2121.2 m] elevation. |
| Reproduction | ovovivparous |
| Types | Holotype: UF 51438. |
| Diagnosis | Diagnosis: “A member of the genus Xenosaurus with nuchal collar straight across middle of neck, not V-shaped: venter without dark markings; light areas between dorsal dark bands whitish, tips of tubercles brownish; lateral fold whitish; a pair of squarish dark marks posterior to occiput; a single, large, bulbous postrostral, wider than long; zygomatic and postorbital ridges in contact through most or all of their parallel length; one row of moderately large supraoculo-orbitals; labiomental row extending forward to 1st chinshield and infralabial; maximum number of scales in a transverse row of scales on venter 25-29; lamellae on 4th toe 19-23; most temporal tubercles contacting each other, no more than a few posterior tubercles separated by one row of granules; tubercles in paravertebral TOWS elongate, flat, slightly larger than lateral tubercles, separated anteroposteriorly from each other by one or two rows of granules; paravertebral re . separated from each other by a distance varying from 2-3 times the length of their tubercles; lateral tubercles of abdomen separated from each other by their own diameter, little more or less; dorsal foreleg and hind leg tubercles mostly in contact with each other, at most one row of granules between them; caudal dark bars solid black above, longer than light tan interspaces, but weakly split and narrower than light interspaces below.” (Smith & Iverson 1993) |
| Comment | Distribution: see maps in WOOLRICH-PIÑA & SMITH 2012 and Nieto-Montes de Oca et al. 2022: 48 (Fig. 6). |
| Etymology | Named after the Latin rectus, straight, and collare, collar, and is used as an adjective modifying the generic name. It alludes to the unique shape of the collar in this species, being straight transverse rather than v-shaped. In-as-much as the nuchal mark of other taxa of the genus has often been referred to as a collar, it is expedient that the specific name should designate kind of collar. (Smith & Iverson 1993) |
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