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Higher TaxaTeiidae, Teiinae, Gymnophthalmoidea, Sauria, Squamata (lizards)
Common Names 
SynonymAmeiva nodam KOCH, VENEGAS, RÖDDER, FLECKS & BÖHME 2013
Cnemidophorus divisus FISCHER 1879
Ameiva bifrontata divisa — RUTHVEN 1924
Ameiva bifrontata divisa — BURT & BURT 1931
Ameiva bifrontata divisa — BURT & BURT 1933 
DistributionN Peru

Type locality: Bellavista, Province of Jaén, Region of Cajamarca, Peru (05°38’15.6’’S, 78°37’59.2’’W, 390–440 m elevation).  
Reproductionoviparous (manual and phylogenetic imputation, fide Zimin et al. 2022) 
TypesHolotype: CORBIDI 1870, adult male, Figs. 1A–F, 2A,B), collected 09 May 2008 by P. Venegas and C. Koch. Paratypes: ZFMK, CORBIDI, MCZ, MHNG, ROM, ZMB. 
DiagnosisDiagnosis and comparison. This comparatively small Ameiva is diagnosed by the following combination of characters: (1) maximum known SVL of 101mm; (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 usually five; (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 centrally through nostril; (10) rostral contacting postnasals; (11) supranasals not contacting supralabials; (12) scales of circumorbital semicircle not extending to anterior margin of third supraocular; (13) 28–33 enlarged ventral scales between gular and vent; (14) 10 longitudinal rows of ventral plates, outermost often distinctly smaller; (15) 86–113 DOM; (16) 165–216 DL; (17) postbrachials dilated; (18) 25–35 LFT; (19) 27–32 SCF; (20) 10–19 FP; (21) five longitudinal yellows stripes on dorsum distinct in juveniles and females, less distinct in most males.
Ameiva nodam sp. nov. can be distinguished from all other described mainland congeners except for A. bifrontata and A. concolor by having a transversely divided frontal plate. From the latter two it differs in the color pattern and from A. concolor also by having the postbrachials dilated.
Especially due to the color pattern of female specimens with five longitudinal yellow dorsal stripes on a brown ground color the new species resembles Medopheos edracanthus, a teiid species that was just recently split of the genus Ameiva and is now considered as being monotypic. It differs from this species by having the frontal plate divided, by lacking preanal spurs and by having 10 instead of 8 longitudinal rows of enlarged ventral scales. 
CommentA. nodam sp. nov. has dilated postbrachials, a maximum known snout-vent length of 101 mm, 10 longitudinal rows of ventral plates, 86–113 midbody granules, 25–35 lamellae under the fourth toe, and a color pattern with 5 longitudinal yellow stripes on the dorsum. 
Etymology“The specific epithet is an agglutination of the exclamation “no dam”. We chose this peculiar name to protest against the possible dam construction activities for four hydroelectricity projects along the Marañón river, between the Regions of Cajamarca and Amazonas. With this we are trying to call attention to the fact that the unique dry forest habitat of this and other endemic species, several of them have only recently been discovered (Koch et al. 2006, 2011; Venegas et al. 2008), is gravely threatened by human interventions.” (KOCH et al. 2013) 
  • 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
  • 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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