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Stenocercus quinarius NOGUEIRA & RODRIGUES, 2006

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Higher TaxaTropiduridae, Iguania, Sauria, Squamata (lizards) 
Subspecies 
Common Names 
SynonymStenocercus quinarius NOGUEIRA & RODRIGUES 2006
Stenocercus quinarius — TORRES-CARVAJAL 2007 
DistributionBrazil (Minas Gerais)

Type locality: pitfall trap located in 15°15’13”S; 45°53’20”W, Parque Nacional Grande Sertão Veredas, municipality of Formoso, state of Minas Gerais, Brazil.  
Reproductionoviparous 
TypesHolotype: MZUSP 94069, field number CN 593, adult male, collected on 31 October 2001 by C. Nogueira and F. França. 
DiagnosisDiagnosis: Stenocercus quinarius sp. nov. is distin- guished from all other Stenocercus, except S. tricristatus and S. dumerilii, by the presence of the following characters (adapted from Ávila-Pires, 1995): head pyramidal, enlarged prominent post-supraciliary scales continuous to a distinct crest formed by supraciliaries and canthals. Supraoculars not enlarged. One elongate subocular. Interparietal small, parietal eye distinct. Gular or neck folds absent, sides of neck with large, imbricate scales. Vertebral and dorsolateral crests present. Dorsals, laterals and ventrals relatively large, imbricate, keeled, sometimes mucronate. Mite pockets absent. FromS. tricristatus (characters in parentheses) it is distinguished by having a shorter tail, 1.0-1.1 times SVL (1.7 times SVL), 47-56 midbody scales (33), 11- 14 scales from one dorsolateral crest to the other (8), five low dorsolateral crests: one vertebral, two dorsolateral and two lateral (only three conspicuous crests, lateral crests undistinguishable), body depressed (body laterally compressed), tail depressed near the base (compressed near the base), and uniform color pattern (banded color pattern). FromS. dumerilii (characters in parentheses, from Ávila-Pires, 1995 and 15 examined specimens) it differs by having 47-56 midbody scales (41-50); shorter tail, 1.0-1.1 times SVL (1.2-1.4); 3-6, mostly five, internasals (2-3); rostral roughly twice as wide as high (approximately four times as wide as high); smaller adult size; dorsal scales keeled throughout the lenght of the scale (keel restricted to or more prominent on the distal part of dorsals); dorsals generally with a small mucron (most non-mucronate); 56-62 caudal scale rows (64-74); anterior canthal shorter than posterior (longer than posterior), adjacent to a strongly keeled first internasal, both scales forming a double canthal ridge (anterior part of canthal ridge restricted to anterior canthal, single canthal ridge); 16-19 lamellae under fourth toe (18-24).
 
CommentSimilar species: Stenocercus dumerilii, S. tricristatus, S.quinarius, and S. squarrosus share combined morphological features (three or five dorsal crests, enlarged post-supraciliary scale, head blunt, pyramidal, bordered by supraciliary crests) unseen in the remainder of the genus (see Avila-Pires 1995, Nogueira & Rodrigues 2006).

Map: see TEIXEIRA et al. 2015: 417.

Color in life: Dorsal ground color uniform light brown, dorsal part of head same color as dorsum. Gular and ventral region slightly lighter, uniform light cream. Tail
region with slightly darker flecks of light tan, alternating with shaded greyish areas, lighter ventrally. A distinct horizontally elongated black spot just above and anterior to insertion of forelimbs. 
Etymologyquinarius, from the Latin “pertaining to five”, in allusion to the five well-marked crests along the body. 
References
  • Carranza, S.; E. N. Arnold & F. Amat 2004. DNA phylogeny of Lacerta (Iberolacerta) and other lacertine lizards (Reptilia: Lacertidae): did competition cause long-term mountain restriction?. Systematics and Biodiversity 2 (1): 57-77
  • Freitas, Marco António de, Daniella Pereira Fagundes de Franca and Tiago de Oliveira Lima. 2011. Geographic Distribution: Stenocercus quinarius. Herpetological Review 42 (3): 391-392 - get paper here
  • NOGUEIRA, C. & RODRIGUES, M.T. 2006. The genus Stenocercus (Squamata: Tropiduridae) in extra-Amazonian Brazil, with the description of two new species. South American J. Herp. 1 (3): 149-165 - get paper here
  • Teixeira, Mauro; Ivan Prates, Carolina Nisa, Nathalia Suzan Camarão Silva-Martins, Christine Strüssmann, Miguel Trefaut Rodrigues 2015. Molecular data reveal spatial and temporal patterns of diversification and a cryptic new species of lowland Stenocercus Duméril & Bibron, 1837 (Squamata: Tropiduridae). Molecular Phylogenetics and Evolution 94: 410-423 (2016), doi:10.1016/j.ympev.2015.09.010 - get paper here
 
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