Plestiodon longiartus GARCÍA-VÁZQUEZ, PAVÓN-VÁZQUEZ, FERIA-ORTIZ & NIETO-MONTES DE OCA, 2021
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Plestiodon longiartus
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| Higher Taxa | Scincidae, Scincinae, Scincoidea, Sauria, Squamata (lizards) |
| Subspecies | |
| Common Names | |
| Synonym | Plestiodon longiartus GARCÍA-VÁZQUEZ, PAVÓN-VÁZQUEZ, FERIA-ORTIZ & NIETO-MONTES DE OCA 2021 |
| Distribution | Mexico (Guerrero) Type locality: approximately 4 km southeast of Paraje Montero on Tlapa de Comonfort-San Luis Acatlán road, Guerrero, Mexico; 17.1568N, 98.6918W; datum 1⁄4 WGS84 in all cases; 2206 m elevation |
| Reproduction | |
| Types | Holotype. MZFC-HE 28877 (field number OORH 59), an adult male; collected on 30 May 2013 by O.O. Rivera-Huerta, E. Pérez-Ramos, E. Centenero-Alcalá, and J.J. Avendan ̃o-Pazos. Paratypes.—Seven specimens, all from the Sierra Madre del Sur of eastern Guerrero and western Oaxaca. Six specimens from the municipality of Malinaltepec, Guerrero: one from the same locality as the holotype (MZFC-HE 28878); one from approximately 3 km west of Paraje Montero, 17.16258N, 98.7078W; 1937 m elevation (MZFC- HE 28876); one from approximately 0.73 km (airline) south of Portezuelo, detour to Xochiatenco, 17.1518N, 98.6918W; 2114 m elevation (MZFC-HE 28875); and three from Ejido Tres Mar ́ıas, San Luis Acatla ́n-Tlapa de Comonfort road (one each from 17.09218N, 98.7388W; 2108 m elevation [MZFC-HE 28879]; 17.09228N, 98.7428W; 2104 m elevation [MZFC-HE 28873]; and 17.17268N, 98.6798W; 2246 m elevation [MZFC-HE 28874]); and one specimen from Guadalupe Zacatepec, municipality of San Andre ́s Cabecera Nueva, Oaxaca, 16.82688N, 97.8798W; 1342 m elevation (MZFC-HE 13447). |
| Diagnosis | Diagnosis. Plestiodon longiartus can be distinguished from all described congeners by the following combination of characters: (1) postnasal scale absent; (2) postmental scale single; (3) scale bordering postgenial scale medially wider than long; (4) primary temporal present; (5) lateral pale line well defined on neck; (6) interparietal contacting nuchals; (7) well-defined dorsolateral pale line extending posteriorly to hind limbs; (8) forelimbs and hind limbs relatively long, touching each other when adpressed against body; (9) four supraoculars; (10) longitudinal dorsal scale rows around midbody 22–24; (11) lamellae under fourth toe 13–17; and, (12) transverse dorsal scale rows 47–52. Comparisons. Plestiodon longiartus can be distinguished from the other members of the P. brevirostris group as follows: from P. bilineatus and P. dicei, by having a primary temporal (vs. primary temporal usually absent in the other species [in .85% and .70% of the specimens, respectively]) and a well-defined lateral pale line on the neck (lateral pale line on the neck usually indistinct in the other species); and additionally from P. bilineatus by having the interparietal contacting the nuchals (vs. interparietal enclosed posteriorly by the parietals in P. bilineatus) and usually more lamellae under the fourth toe (13–17, x̅ = 14.3, n = 7; vs. 11–13, x̅ = 11.7, n = 42, in P. bilineatus); from P. brevirostris, P. indubitus, P. nietoi, and P. parvulus, by having a well-defined dorsolateral pale line distinct throughout its length and extending posteriorly to the hind limbs (vs. dorsolateral pale line gradually becoming indistinct posteriorly and usually not extending posteriorly to the hindlimbs in the other species); additionally from P. brevirostris by having longer forelimbs and hind limbs that touch each other when adpressed against the body (vs. limbs not touching each other when adpressed against the body in adults of P. brevirostris); from P. colimensis, by having fewer longitudinal dorsal scale rows around midbody (22–24, x̅ = 23.8, n = 8; vs. 26–28, x̅ = 27, n = 4, in P. colimensis); from P. lotus, by having the interparietal contacting the nuchals (vs. interparietal enclosed posteriorly by the parietals in P. lotus) and the primary lateral dark lines usually separated medially from each other by the four median dorsal scale rows and upper half of the adjacent row on each side at the level of midbody (vs. primary lateral dark lines separated medially from each other by the six median dorsal scale rows and upper half of the adjacent row on each side at the level of midbody in P. lotus); and additionally from P. colimensis, P. indubitus, P. nietoi, and P. parvulus by having the interparietal contacting the nuchals (vs. interparietal usually enclosed posteriorly by the parietals in the other species); from P. copei, by having fewer transverse dorsal scale rows between the nuchals and the level above the vent (47–52, x̅ = 50.3, n = 8; vs. 53–61, x̅ = 56.6, n = 35, in P. copei) and a lateral pale line reaching the forelimbs level (vs. lateral pale line reaching the hind limbs in P. copei); from P. dugesii, by having four supraoculars (vs. three supraoculars in P. dugesii); from P. lynxe and P. sumichrasti, by having the region between the dorsolateral pale lines uniformly colored in all growth stages (vs. dorsum bearing a pale median line that is conspicuous in juveniles and faint in large adults of the other species); from P. ochoterenae, by usually having more lamellae under the fourth toe (13–17, x̅ = 14.3, n = 16 [counts performed on both sides]; vs. 10–13, x̅ = 11.5, n = 24, in P. ochoterenae), a lateral pale line on the neck that is distinct from the darker ventral coloration (lateral pale line on neck merging with pale ventral coloration in P. ochoterenae), and longer forelimbs and hind limbs that touch each other when adpressed against the body (vs. limbs not touching each other when adpressed against the body in P. ochoterenae); and from P. parviauriculatus, by usually having more lamellae under the fourth toe (13–17, x̅ = 14.3, n1⁄416[counts performed on both sides];vs.10–13,x̅1⁄4 11.1, n = 14, in P. parviauriculatus) and more longitudinal dorsal scale rows (22–24, x̅ = 23.8, n = 8; vs.19–20, x̅ = 19.9, n = 14, in P. parviauriculatus) (modified and corrected after GARCÍA-VÁZQUEZ et al. 2021). |
| Comment | |
| Etymology | The specific name is formed from the Latin words longus (long) and artus (limb), in reference to the long limbs present in the new species. |
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