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Gelanesaurus flavogularis ALTAMIRANO-BENAVIDES, ZAHER, LOBO, GRAZZIOTIN, SALES-NUNES & RODRIGUES, 2013

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Higher TaxaGymnophthalmidae (Cercosaurinae), Sauria, Gymnophthalmoidea, Squamata (lizards) 
Subspecies 
Common Names 
SynonymPotamites flavogularis ALTAMIRANO-BENAVIDES, ZAHER, LOBO, GRAZZIOTIN, SALES NUNES & RODRIGUES 2013
Gelanesaurus flavogularis — TORRES-CARVAJAL et al. 2016 
DistributionE Ecuador (Napo, Tungurahua), 1800 m elevation

Type locality: Reserva Biológica Narupa (0° 45’ 30.0”S, 77° 54’ 37.1”W), 1800 m elevation, Província de Napo, canton Loreto: Ecuador.  
Reproduction 
TypesHolotype: DHMECN 4581, an adult male; collected by P. Meza-Ramos, S. Cáceres S., M. A. Urgilés, and L. Oyagata C., on November 29th 2006, field number PMR409.
Paratypes. DHMECN 4583, male, collected together with the holotype, field number PMR 412; DHMECN 10050–10051, females, DHMECN 10052, male, from Reserva Rio Zuñac (1° 24’ 03.6”S, 78° 11’ 12.4” W) 1440 m elevation, Província Tungurahua: Baños: Rio Negro: Ecuador, collected by M. Yánez-Muñoz, M. A. Urgilés y A. Laguna C., on May 8th 2008, field numbers MYM 1628, MYM1649, and MYM 1718, respectively; DHMECN 10054–10056, females, Rio Negro, Montana (1° 24’ 57.6”S, 78° 12’ 28.8”W), 1440 m elevation, Provincia Tungurahua: Baños: Rio Negro: Ecuador, collected by Eric N. Smith, M. Yánez-Muñoz, B.Purtschert C., J. Stricher, y L. Oyagata C., on January 7th 2008, field numbers ENS 12220-12225. 
CommentSimilar species: Potamites flavogularis is closely related, sibling, and sympatric to Potamites cochranae to which it has been previously confused.

Diagnosis (short): Potamites flavogularis is characterized by the absence of isolated basal flounces of spines and presence of calcareous spinules on flounces of the hemipenis, a short (1,30–1,41 times SVL) and slightly compressed tail without tubercles, tympanum slight- ly recessed, subimbricate ventral scales, lateral body scales lacking conspicuous enlarged tubercles, four longitudinal rows of dorsal tubercles, 6 transverse series of ventral scales, absence of intercalated scales along sides of tail, and absence of tubercles on sides of neck and gular regions. Like their congeners, the new species was found close to vegetation surround- ing streams in primary and secondary forests.

Diagnosis. a species of Potamites with a single frontonasal; regular longitudinal rows of dorsal tubercules in series of single enlarged and strongly keeled tubercles; absence of enlarged tubercules on sides of body, neck and gular region; tail slightly compressed with no intercalated scales along sides, and a brown spot around nostril. Potamites flavogularis sp. nov. differs from all species of Neusticurus (characteristics in brackets) by presenting a short and slightly compressed tail (long and highly compressed), tympanum slightly recessed (highly), presence of calcareous spinules on flounces of the hemipenis (absent) and sub-imbricate ventral scales (imbricate). From all other species of Potamites except for P. cochranae, it differs by presenting a single frontonasal, lateral body scales lacking conspicuous enlarged tubercles, four longitudinal rows of dorsal tubercles, six transverse series of ventral scales, absence of intercalated scales along sides of tail, and absence of tubercles on sides of neck and gular regions. Like P. cochranae the new species has a conspicuous black or brown spot surrounding nostril but differs from it by presenting a slightly shorter tail (1,34–1,41 times SVL vs 1,53–1,58), by having distinctive and homogeneous dorsolateral and paravertebral longitudinal rows of tubercles formed by a sequential series of unique enlarged and strongly keeled tubercles [irregular and heterogeneous, containing irregularly one or more than one (mostly two) enlarged tubercles more rounded and with keels never so conspicuous], dorsolateral and paravertebral rows of tubercles distinct anteriorly and closely approaching scales from posterior part of head (indistinct anteriorly and not so close from scales on the posterior part of head), a short loreal with its suture with nasal corresponding to less than half to the posterior part of nasal (large loreal, its suture with nasal corresponding to the major part of nasal scale), enlarged scales on posterior part of tight (mostly granular scales), basal flounces of the hemipenial body circulating the assulcate face of the base of the organ (basal flounces of the hemipenial body restricted to the center of asulcate face), and in color pattern where a strong sexual dichromatism is present (absent). 
EtymologyFrom the Latin flavus (=yellowish) and gularis (=throat). 
References
  • ALTAMIRANO-BENAVIDES, MARCO; HUSSAM ZAHER, LUCIANA LOBO, FELIPE GOBBI GRAZZIOTIN, PEDRO MURILO SALES NUNES & MIGUEL TREFAUT RODRIGUES, 2013. A new species of lizard genus Potamites from Ecuador (Squamata, Gymnophthalmidae). Zootaxa 3717 (3): 345–358 - get paper here
  • Torres-Carvajal, Omar; Simón E. Lobos, Pablo J. Venegas, Germán Chávez, Vanessa Aguirre-Peñafiel, Daniel Zurita, Lourdes Y. Echevarría 2016. Phylogeny and biogeography of the most diverse clade of South American gymnophthalmid lizards (Squamata, Gymnophthalmidae, Cercosaurinae). Molecular Phylogenetics and Evolution 99: 63-75, doi:10.1016/j.ympev.2016.03.006 - get paper here
 
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