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Ameiva aggerecusans KOCH, VENEGAS, RÖDDER, FLECKS & BÖHME, 2013

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Higher TaxaTeiidae, Teiinae, Gymnophthalmoidea, Sauria, Squamata (lizards)
Common Names 
SynonymAmeiva aggerecusans KOCH, VENEGAS, RÖDDER, FLECKS & BÖHME 2013 
DistributionN Peru

Type locality: Balsas, Province of Chachapoyas, Region of Amazonas, Peru, 06°49’11.6’’S, 78°00’12.2’’W, 1000 m elevation.  
Reproductionoviparous (manual and phylogenetic imputation, fide Zimin et al. 2022) 
TypesHolotype: ZFMK 85024, adult male, Figs. 5, 6A, collected on 08 July 2005 by P. Venegas and C. Koch. 
DiagnosisDiagnosis and comparison. This comparatively small Ameiva is diagnosed by the following combination of characters: (1) maximum known SVL of 99.3 mm; (2) lacking longitudinal ridge on frontal scale; (3) frontal plate divided in two subequal scales; (4) postnasals separated from prefrontals by frontonasals; (5) parietal scales 5–7; (6) median gular scales not enlarged; (7) enlarged median mesoptychial scales slightly larger than largest gulars; (8) gulars posterior to the interauricular crease smaller than anterior gulars; (9) nasal suture passes through the superior half or centrally through nostril; (10) rostral not contacting or in short contact with postnasal; (11) supranasals not contacting or in short contact with supralabials; (12) scales of circumorbital semicircle not extending to anterior margin of third supraocular; (13) 30–33 enlarged ventral scales between gular and vent; (14) 10–12 longitudinal rows of ventral plates, outermost often distinctly smaller; (15) 73–92 DOM; (16) 144–198 DL; (17) postbrachials not or hardly dilated; (18) 31–39 LFT; (19) 26–32 SCF; (20) 12–22 FP; (21) cream-colored vertebral stripe present in most females and juvenile specimens.
Ameiva aggerecusans sp. nov. can be differentiated from all other mainland congeners except for A. bifrontata, A. concolor and A. nodam sp. nov. by having a transversely divided frontal plate. From A. bifrontata and A. nodam sp. nov. this species can be distinguished by lacking distinctly dilated postbrachials. It resembles A. concolor but has a lower maximum SVL and a distinctly more defined cream-colored vertebral stripe on the dorsum. 
CommentAmeiva aggerecusans sp. nov. has not or only hardly dilated postbrachials, a maximum known snout-vent length of 99.3 mm, 10–12 longitudinal rows of ventral plates, 73–92 midbody granules, 31–39 lamellae under the fourth toe, and the females and juveniles of the species normally exhibit a cream-colored vertebral stripe on a dark dorsum ground color. 
Etymology“The specific epithet is an agglutination of the Latin nomen “agger” which means dam and the verb “recusare” which means reject. As in Ameiva nodam sp. nov. this name was chosen to further emphasize our protest against the possible dam constructions along the Marañón river.” (KOCH et al. 2013) 
  • Fonseca, Wirven Lima da; Julivaldo Dantas da Silva, Arthur Diesel Abegg, Conrado Mario da Rosa, Paulo Sergio Bernarde 2019. Herpetofauna of Porto Walter and surrounding areas, Southwest Amazonia, Brazil. Herpetology Notes 12: 91-107 - get paper here
  • KOCH, CLAUDIA; PABLO J. VENEGAS, DENNIS RÖDDER, MORRIS FLECKS & WOLFGANG BÖHME 2013. Two new endemic species of Ameiva (Squamata: Teiidae) from the dry forest of northwestern Peru and additional information on Ameiva concolor Ruthven, 1924. Zootaxa 3745 (2): 263–295 - get paper here
  • KOCH, CLAUDIA; PABLO J. VENEGAS, ROY SANTA CRUZ, WOLFGANG BÖHME 2018. Annotated checklist and key to the species of amphibians and reptiles inhabiting the northern Peruvian dry forest along the Andean valley of the Marañón River and its tributaries. Zootaxa 4385 (1): 001–101 - get paper here
  • Kwet, Axel 2014. Liste der im Jahr 2013 neu beschriebenen Reptilien. Terraria-Elaphe 2014 (3): 56-67 - get paper here
  • Morato, Sérgio Augusto Abrahão; Guilherme Nunes Ferreira; Michela Rossane Cavilha Scupino (eds.) 2018. Herpetofauna da Amazônia Central: Estudos na FLONA de Saracá-Taquera. Curitiba, Pr: STCP Engenharia de Projetos Ltda.; Porto Trombetas, Pa: MRN – Mineração Rio do Norte S.A., 2018.<br />210p. - get paper here
  • Rabosky, Daniel L.; Rudolf von May, Michael C. Grundler and Alison R. Davis Rabosky 2019. The Western Amazonian Richness Gradient for Squamate Reptiles: Are There Really Fewer Snakes and Lizards in Southwestern Amazonian Lowlands? Diversity 11: 199; doi:10.3390/d11100199 - get paper here
  • Zimin, A., Zimin, S. V., Shine, R., Avila, L., Bauer, A., Böhm, M., Brown, R., Barki, G., de Oliveira Caetano, G. H., Castro Herrera, F., Chapple, D. G., Chirio, L., Colli, G. R., Doan, T. M., Glaw, F., Grismer, L. L., Itescu, Y., Kraus, F., LeBreton 2022. A global analysis of viviparity in squamates highlights its prevalence in cold climates. Global Ecology and Biogeography, 00, 1–16 - get paper here
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