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Stenocercus amydrorhytus KÖHLER & LEHR, 2015

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Higher TaxaTropiduridae, Iguania, Sauria, Squamata (lizards) 
Subspecies 
Common Names 
SynonymStenocercus amydrorhytus KÖHLER & LEHR 2015
Stenocercus cf. ornatissimus — LEHR 2002: 87 
DistributionPeru (Ancash)

Type locality: Coris, -9.83000, -77.73383, 2785 m elevation, Departamento Ancash, Provincia Aija, Peru  
Reproduction 
TypesHolotype: MUSM 20221, an adult male, collected 11 February 1997 by Edgar Lehr. Field tag number EL 140. Paratypes. 6 (all females). All from Coris, Departamento Ancash, Provincia Aija, Peru, collected 11 February 1997 by Edgar Lehr: MUSM 20222, -9.81183, -77.72500, 2900 m. MUSM 20224, -9.82867, -77.73250, 2810 m. SMF 80228, -9.80305, -77.73195, 2890 m. SMF 80229, -9.81112, -77.72750, 3015 m. MUSM 20223, SMF 80230, -9.80305, -77.73112, 3075 m. 
DiagnosisDiagnosis. Stenocercus amydrorhytus differs from all other congeners except S. ivitus, S. chrysopygus, S. melanopygus, S. modestus, S. orientalis, and S. stigmosus by the combination of (1) a poorly developed oblique neck fold with a shallow or no mite pocket underneath (Fig. 1); (2) a well developed antehumeral fold with a deep mite pocket underneath; (3) scales on posterior surface of thighs granular; (4) vertebral scales similar in size and shape to adjacent scale rows; (5) three caudal whorls per autotomic segment. Stenocercus amydrorhytus differs from S. ivitus in having lateral nuchals less than half the size of dorsal nuchals (vs. lateral nuchals similar in size to dorsal nuchals in S. ivitus). Stenocercus amydrorhytus differs from S. orientalis in having predominantly smooth dorsal head scales (vs. prominently keeled dorsal head scales in S. orientalis). Stenocercus amydrorhytus differs from S. modestus in having 42–47 scales around midbody (vs. fewer than 40 in S. modestus) and by having a tail length less than 70% of total length (at least 70% in S. modestus). Stenocercus amydrorhytus differs from S. melanopygus in having a poorly developed oblique neck fold with a shallow or no mite pocket underneath (vs. oblique neck fold absent in S. melanopygus). Stenocercus amydrorhytus differs from S. stigmosus in having a mostly yellowish venter without blotches or spots in the only known adult male (vs. males with distinct black spots on venter in S. stigmosus) and in having larger dorsal scales, 44–52, mean 47.3, vertebral scales (vs. dorsal scales smaller, 51–61, mean 56.4, vertebral scales in S. stigmosus), 42–47, mean 44.3, scales around midbody (vs. 49–57, mean 52.7, in S. stigmosus). Stenocercus amydrorhytus differs from S. chrysopygus in having larger dorsal scales, 44–52, mean 47.3, vertebral scales (vs. dorsal scales smaller, 54–86, mean 66.0, vertebral scales in S. chrysopygus), 42–47, mean 44.3, scales around midbody (vs. 48–82, mean 64.3, in S. chrysopygus), 18–21, mean 19.3, gulars (vs. 23–28, mean 22.5, in S. chrysopygus), and 23–26, mean 24.4, subdigital lamellae under fourth toe (vs. 22–30, mean 26.0, in S. chrysopygus). 
CommentAbundance: only known from its original description (Meiri et al. 2017). 
EtymologyThe name amydrorhytus is a compound noun in apposition derived from the Greek words amydros (“indistinct, obscure”) and rythis (“fold, wrinkle”) and refers to the poorly developed oblique neck fold characteristic for this species. 
References
  • KÖHLER, GUNTHER & EDGAR LEHR 2015. Two new species of lizards of the genus Stenocercus (Iguania, Tropiduridae) from central Peru. Zootaxa 3956 (3): 413–427
  • 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
 
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