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Plestiodon nietoi FERIA-ORTIZ & GARCÍA-VÁZQUEZ, 2012

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Higher TaxaScincidae, Scincinae, Scincoidea, Sauria, Squamata (lizards)
Common Names 
SynonymPlestiodon nietoi FERIA-ORTIZ & GARCÍA-VÁZQUEZ 2012
Plestiodon nietoi — PALACIOS-AGUILAR 2020 
DistributionMexico (Guerrero: Sierra Madre del Sur)

Type locality: La Llave, El Balcón, Ajuchitan del Progreso, Guerrero, México (17° 37’ 21.9’’ N, 100° 34’ 29.3’’ W) at 1831 m elevation.  
TypesHolotype: MZFC 22249 (original number JCBH 115), an adult male, collected by Jean Cristian Blancas Hernan- dez on 05 February 2007 Paratypes. Twelve specimens, all from Ajuchitlan del Progreso municipality, Guerrero, Mexico: three from the same locality as the holotype (MZFC 22250–22252); two from El Filo, El Balcón (MZFC 22247–22248); two from El Moreno, El Balcón (MZFC 22253–22254); and five from road La Ola-San Antonio Texas (UTA 58460- 58464). 
DiagnosisDiagnosis: Plestiodon nietoi sp. nov. can be distinguished from all other species of the P. brevirostris group by large adult body size (up to 77 mm maximum SVL in P. nietoi sp. nov. vs. 73 mm maximum SVL in the other spe- cies; Table 1). In addition, P. nietoi sp. nov. can be distinguished from P. ochoterenae, P. parviauriculatus, P. copei, P. brevirostris, and P. dicei by having the interparietal enclosed posteriorly by parietals in most specimens (91.7% in P. nietoi sp. nov., 0–11.8% in all other taxa), and from P. bilineatus, P. dicei and P. indubitus by having a pale lat- eral line on the neck (absent in the other subspecies and replaced by a series of scales that have white anterior edges and centers with black posterior borders, on longitudinal scale rows 5–9 or any combination of these rows in sequence on P. indubitus). Plestiodon nietoi sp. nov. can be distinguished from P. dugesii by having four supraocu- lars (vs. three in P. dugesii). Furthermore, P. nietoi sp. nov. differs from P. parvulus and P. copei by having the seventh supralabial in con- tact with the upper secondary temporal (absence of contact in P. parvulus and P. copei), from P. colimensis by having fewer scales encircling the body (21–23, x = 22.1, n = 13 in P. nietoi; 27–28, x = 27.5, n = 2 in P. colimensis) and more body scales than P. parviauriculatus (19–20, x = 19.9, n = 14). Additionally, P. nietoi sp. nov. may be dis- tinguished from P. brevirostris, P. dicei, and P. copei by fewer paravertebral scales (47–51, x = 50, n = 13 in P. nie- toi sp. nov., 52–58, x = 56.0, n = 38; 48–60, x = 55.3, n = 46; and 53–61, x = 56.6, n = 35, in P. brevirostris, P. dicei, and P. copei, respectively) [from FERIA-ORTIZ & GARCÍA-VÁZQUEZ 2012]. 
CommentSimilar species: P. brevirostris and P. indubitus.

Abundance: only known from its original description (Meiri et al. 2017). 
EtymologyThe specific epithet is a patronym honoring Adrian Nieto Montes de Oca for his research on the herpetofauna of México, specifically with taxa from the families Polychrotidae, Teiidae, and Scincidae. 
  • Bryson, R. W., Linkem, C. W., Pavón-Vázquez, C. J., Nieto-Montes de Oca, A., Klicka, J. and McCormack, J. E. 2017. A phylogenomic perspective on the biogeography of skinks in the Plestiodon brevirostris group inferred from target enrichment of ultraconserved elements. J. Biogeogr.. doi:10.1111/jbi.12989 - get paper here
  • Feria-Ortiz, Manuel & Garcia-Vázquez, Uri Omar 2012. A new species of Plestiodon (Squamata: Scincidae) from Sierra Madre del Sur of Guerrero, México. Zootaxa 3339: 57–68 - get paper here
  • Meiri, Shai; Aaron M. Bauer, Allen Allison, Fernando Castro-Herrera, Laurent Chirio, Guarino Colli, Indraneil Das, Tiffany M. Doan, Frank Glaw, Lee L. Grismer, Marinus Hoogmoed, Fred Kraus, Matthew LeBreton, Danny Meirte, Zoltán T. Nagy, Cristiano d 2017. Extinct, obscure or imaginary: the lizard species with the smallest ranges. Diversity and Distributions - get paper here
  • Palacios-Aguilar, Ricardo & OSCAR FLORES-VILLELA 2018. An updated checklist of the herpetofauna from Guerrero, Mexico. Zootaxa 4422 (1): 1-24 - get paper here
  • PAVÓN-VÁZQUEZ, CARLOS J., ADRIÁN NIETO-MONTES DE OCA, ANDRÉS A. MENDOZA-HERNÁNDEZ, ERIC CENTENERO-ALCALÁ, SAMUEL A. SANTA CRUZ-PADILLA, VÍCTOR H. JIMÉNEZ-ARCOS 2017. A new species of Plestiodon (Squamata: Scincidae) from the Balsas Basin, Mexico. Zootaxa 4365 (2): 149-172 - get paper here
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