Helicops petersi ROSSMAN, 1976

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Higher Taxa	Colubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies
Common Names	E: Spiral Keelback
Synonym	Helicops petersi ROSSMAN 1976 Helicops petersi — DUELLMAN 1978: 243 Helicops petersi — KAWASHITA-RIBEIRO et al. 2013 Helicops petersi — WALLACH et al. 2014: 323
Distribution	Ecuador (eastern Andean foothills), Colombia Type locality: Ecuador, Napo, E. bank of Rio Misahualli, 1 mi NE Tena.
Reproduction	ovovivparous
Types	Holotype: USNM 196360
Diagnosis	Diagnosis: Helicops petersi can be distinguished from all its congeners except H. pastazae by the combination of 21–23 dorsal scale rows at midbody, reducing to 16 anterior to cloaca, and 135–150 ventrals (for information on references see Suppl. material 3, Schöneberg & Köhler 2021).
Comment
Etymology	Named after James A. Peters (1922-1972), American herpetologist, specializing on South American reptiles.
References	Costa, Henrique C.; Diego J. Santana, Fernando Leal, Ricardo Koroiva, and Paulo C.A. Garcia 2016. A New Species of Helicops (Serpentes: Dipsadidae: Hydropsini) from Southeastern Brazil. Herpetologica 72 (2): 157-166 - get paper here Kawashita-Ribeiro, Ricardo Alexandre; Robson Waldemar Ávila, and Drausio Honorio Morais 2013. A New Snake of the Genus Helicops Wagler, 1830 (Dipsadidae, Xenodontinae) from Brazil. Herpetologica 69 (1): 80-90. - get paper here McKay, J. Lindley & Olga Milenkaya 2023. Erstnachweis von Helicops petersi aus Kolumbien. Sauria 45 (2): 61-68 MORAES-DA-SILVA, ANTONIO; RENATA CECÍLIA AMARO, PEDRO M. SALES NUNES, CHRISTINE STRÜSSMANN, MAURO JUNIOR TEIXEIRA, ALBEDI JR. ANDRADE, VINÍCIUS SUDRÉ, RENATO RECODER, MIGUEL TREFAUT RODRIGUES, FELIPE FRANCO CURCIO 2019. Chance, luck and a fortunate finding: a new species of watersnake of the genus Helicops Wagler, 1828 (Serpentes: Xenodontinae), from the Brazilian Pantanal wetlands. Zootaxa 4651 (3): 445–470 - get paper here Rossman, Douglas A. 1976. Revision of the South American colubrid snakes of the Helicops pastazae complex. Occasional papers of the Museum of Zoology, Louisiana State University (50): 1-15 - get paper here Schöneberg, Y., & Köhler, G. 2021. Distribution and identification of the species in the genus Helicops Wagler, 1830 (Serpentes, Colubridae, Xenodontinae). ARPHA Preprints, 1, e67869 - get paper here Torres-Carvajal O, Pazmiño-Otamendi G, Salazar-Valenzuela D. 2019. Reptiles of Ecuador: a resource-rich portal, with a dynamic checklist and photographic guides. Amphibian & Reptile Conservation 13 (1): [General Section]: 209–229 (e178) - get paper here Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. [type catalogue] Taylor and Francis, CRC Press, 1237 pp.
External links	IUCN Red List https://bioweb.bio/faunaweb/reptiliaweb/FichaEspecie/Helicops%20petersi https://www.facebook.com/groups/stshc/posts/296893799201892/ Google images

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