Atractus natans HOOGMOED & PRUDENTE, 2003

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Higher Taxa	Colubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies
Common Names
Synonym	Atractus natans HOOGMOED & PRUDENTE 2003 Atractus emersoni SILVA HAAD 2004 Atractus emersoni — PASSOS et al. 2007 Atractus natans — PASSOS et al. 2007 Atractus natans — WALLACH et al. 2014: 77 Atractus natans — NOGUEIRA et al. 2019
Distribution	Brazil (Amazonas, Pará), Peru (Loreto) Type locality: near flutuante at confluence of Paraná Apara and Rio Mamirauá, Estação Ecológica de Mamirauá, Município de Uarini, Amazonas, Brazil, 3°02’57.2”S 64°50’59.7”W, 50 m elevation. emersoni: Colombia (Amazonas), Brazil; Type locality: Boa Vista-Brasil. Municipio de Benjamín Constant, en la rivera del río Solimoes, situada a 4º, 25’ de latitud sur y a 70º de longitud oeste.
Reproduction	oviparous
Types	Holotype: MPEG 18836 Holotype: ICN-MHN = ICN 10097 [emersoni]
Diagnosis
Comment	Synonymy: Passos et al (2012) synonymized A. emersoni with A. natans.
Etymology	Named after Latin “natans” = floating, in loose reference to the fact that all specimens collected in Mamirauá (the majority of the type series) were found in floating rotten logs in flooded forest. Etymology (emersoni): “Dedicada en homenaje al Dr. Helio Emerson Belluomini, del Instituto Butantan, en reconocimiento a su valiosa contribución al estudio de las serpientes venenosas del Brasil, a la producción media de veneno y la determinación de la potencia letal de éstos, en animales domésticos.”
References	Hoogmoed, M. S.; Prudente, A. L. C. 2003. A new species of Atractus (Reptilia: Ophidia: Colubridae: Dipsadinae) from the Amazon forest region in Brazil. Zoologische Mededelingen 77 (15/36): 425-440 - get paper here Nogueira, Cristiano C.; Antonio J.S. Argôlo, Vanesa Arzamendia, Josué A. Azevedo, Fausto E. Barbo, Renato S. Bérnils, Bruna E. Bolochio, Marcio Borges-Martins, Marcela Brasil-Godinho, Henrique Braz, Marcus A. Buononato, Diego F. Cisneros-Heredia, 2019. Atlas of Brazilian snakes: verified point-locality maps to mitigate the Wallacean shortfall in a megadiverse snake fauna. South American J. Herp. 14 (Special Issue 1):1-274 - get paper here Passos, P. & Fernandes, R. 2008. A new species of the colubrid snake genus Atractus (Reptilia: Serpentes) from the central Amazon of Brazil. Zootaxa 1849: 59–66 - get paper here Passos, P., R. Fernandes and Borges-Nojosa, D.M. 2007. A New Species of Atractus (Serpentes: Dipsadinae) from a Relictual Forest in Northeastern Brazil. Copeia 2007 (4): 788–797 - get paper here Passos, Paulo; Diego Cisneros-Heredia, Dani Enrique Rivera, Cesar Aguilar, and Walter E Schargel 2012. Rediscovery of Atractus microrhynchus and Reappraisal of the Taxonomic Status of A. emersoni and A. natans (Serpentes: Dipsadidae). Herpetologica 68 (3): 375-392. - get paper here Silva Haad, J.J. 2004. Las serpientes del género Atractus Wagler, 1828 (Colubridae; Xenodontinae) en la Amazonia colombiana. [The snakes of the genus Atractus Wagler, 1828 (Colubridae; Xenodontinae) in the colombian Amazonia.]. Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales (108): 409-446 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 http://www.accefyn.org.co/PubliAcad/Periodicas/Volumen28/108/10_409_%20446… http://www.snakesofcolombia.com/base/index.jsp https://www.facebook.com/groups/stshc/posts/565699222321347/ https://accesspd.co.za/species/horned-adder https://accesspd.co.za/species/many-horned-adder Google images

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