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Petracola angustisoma ECHEVARRÍA & VENEGAS, 2015

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Higher TaxaGymnophthalmidae (Cercosaurinae), Sauria, Gymnophthalmoidea, Squamata (lizards) 
Common Names 
SynonymPetracola angustisoma ECHEVARRÍA & VENEGAS 2015 
DistributionPeru (Amazonas)

Type locality: vicinity of Cocachimba (06 ̊02’37.2’’S, 77 ̊53’15.8’’W; Datum WGS 84) at 1,889 m, Bongará province, Amazonas department, Peru  
TypesHolotype: CORBIDI 00467 (Figs. 1–3A), adult male, collected by P.J. Venegas on 24 June 2007. 
DiagnosisDiagnosis: Petracola angustisoma differs from P. labioocularis (character states in parentheses) in having two supraoculars (three), 37 transverse dorsal scale rows (34–35), 22 transverse ventral scale rows (18–20), dorsum pale brown with seven discontinuous dark brown longitudinal stripes extending to the base of tail (brown or olive brown with a dorsolateral pale stripe on neck and body), and venter white with black semicircular marks on anterior margin of scales (grayish brown, with no pattern); precloacal pores absent (present); and by lacking supralabial-subocular fusion (present). The new species can be distinguished from P. ventrimaculata by having a gracile body (robust, Fig. 3B), three discontinuous superciliaries (two), loreal present (usually absent), nine femoral pores per hind limb in males (2–5), and venter white with black semicircular marks on anterior margin of scales (yellow with bold black bands); from P. waka it differs in having three discontinuous superciliaries (four, usually continuous), two genials (three), and nine femoral pores per hind limb in males (5–7; Table 1).
Petracola angustisoma differs from all known species of Euspondylus, except E. spinalis, by lacking prefrontal scales and from E. spinalis by having two supraoculars (three in E. spinalis); from Pholidobolus by having dorsals smooth and juxtaposed (imbricate, striate, or keeled in Pholidobolus); from Proctoporus by having smooth dorsal scales (keeled in Proctoporus); and from Riama by having smooth dorsals (smooth, striate, rugose, or keeled in Riama). 
CommentAbundance: only known from the type specimen (Meiri et al. 2017). 
EtymologyThe specific epithet angustisoma is a noun (in apposition) in the nominative singular and derives from the Latin words angusti (= narrow) and soma (= body). It refers to the slender body of this species. 
  • Echevarría LY, Venegas PJ. 2015. A new elusive species of Petracola (Squamata: Gymnophthalmidae) from the Utcubamba basin in the Andes of northern Peru. Amphibian & Reptile Conservation 9(1): 26–33 (e107) - get paper here
  • Kwet, A. 2016. Liste der im Jahr 2015 neu beschriebenen Reptilien. Terraria-Elaphe 2016 (3): 56-67 - 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
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