You are here » home › advanced search › Eunectes notaeus

Eunectes notaeus COPE, 1862

IUCN Red List - Eunectes notaeus - Least Concern, LC
iNaturalist logo

Can you confirm these amateur observations of Eunectes notaeus?

Add your own observation of
Eunectes notaeus »

Find more photos by Google images search: Google images

Higher TaxaBoidae (Boinae), Henophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Yellow Anaconda
G: Paraguay-Anakonda, Gelbe Anakonda
Portuguese: Boiguaçu, Curudiu, Curundiu, Quetomeniope, Sucuri, Sucuri-Amarela, Sucurijú, Sucuri-do-Pantanal, Sucuriu 
SynonymEunectes notaeus COPE 1862: 70
Eunectes murinus PERACCA 1895 (nec LINNAEUS)
Eunectes wieningeri STEINDACHNER 1903: 15
Eunectes notaeus — KAHL et al. 1980: 207
Eunectes notaeus — CEI 1993
Eunectes notaeus — LEYNAUD & BUCHER 1999: 14
Eunectes notaeus — MCDIARMID, CAMPBELL & TOURÉ 1999: 201
Eunectes notaeus — ZARACHO et al. 2014
Eunectes notaeus — WALLACH et al. 2014: 291
Eunectes notaeus — REYNOLDS & HENDERSON 2018: 22
Eunectes notaeus — NOGUEIRA et al. 2019
Eunectes notaeus — DUBOIS et al. 2024 
DistributionBolivia, Paraguay, Uruguay, W Brazil (Mato Grosso, Mato Grosso do Sul, Rio Grande do Sul, Paraná [HR 27: 216], São Paulo), NE Argentina (Chaco, Corrientes, Entre Rios, Formosa, Misiones, Santa Fé, Corrientes, Santiago del Estero).

Type locality: Paraguay River and its tributaries  
Reproductionovoviviparous 
TypesHolotype: lost, was USNM 4707 (lost fide Reynolds & Henderson 2018)
Holotype: NMW 18929 [wieningeri] 
DiagnosisUnfortunately we had to temporarily remove additional information as this was scraped by multiple AI companies who sell that data to their customers. These details, e.g. detailed descriptions or comparisons (about 3789 characters), are available for collaborators and contributors. Please contact us for details. 
CommentHybridization: Hybrids between Eunectes notaeus and E. murinus have been described and E. deschauenseei is extremely closely related to E. notaeus (fide DIRKSEN & BÖHME 1998).

Phylogenetics: E. notaeus, beniensis, and deschauenseei are closely related and Rivas et al. 2024 suggested to synonymize them, cofirming data by Tarkhnishvili et al. 2022.

Distribution: see map and list of localities in Tarkhnishvili et al. 2022: 380 (Fig. 1). 
EtymologyNamed after Greek notiaios (νωτιαῖος), of the back. (COPE 1862, Esteban Lavilla, pers. comm., April 2024) 
References
  • Abalos, J.W., Baez, E.C., & Nader, R. 1964. Serpientes de Santiago del Estero. Acta Zoologica Lilloana 20: 211-283
  • Akeret, B. 2008. Gefahrenpotenzial Riesenschlangen. Reptilia (Münster) 13 (72): 4-12 - get paper here
  • Albuquerque, N.R.; Wellinton S. Arruda, Arianna S. Costa; Regiane C.V. Galharte; Lays G.H. Vargas and Ivã H. Moreno 2010. A dicephalic yellow anaconda snake, Eunectes notaeus (Serpentes: Boidae), from Southern Pantanal, Brazil. Journal of Natural History 44: 1989-1994 - get paper here
  • Barone, S. 2003. Eunectes notaeus - Yellow Anaconda. Reptilia (GB) (29): 51-54 - get paper here
  • Beddard, F.E. 1906. Contributions to the Anatomy of the Ophidia. Proc. Zool. Soc. London 1906: 12-44
  • Biswas, A., Ghosh, A., & Agashe, M. 2025. In ‘hot’pursuit: exploring the evolutionary ecology of labial pits in boas and pythons. Proceedings B, 292(2045), 20250199 - get paper here
  • Cacciali, Pier; Norman J. Scott, Aida Luz Aquino Ortíz, Lee A. Fitzgerald, and Paul Smith 2016. The Reptiles of Paraguay: Literature, Distribution, and an Annotated Taxonomic Checklist. SPECIAL PUBLICATION OF THE MUSEUM OF SOUTHWESTERN BIOLOGY, NUMBER 11: 1–373 - get paper here
  • Camera, B.F.; Prudente, A.L.C. 2023. Natural history notes: Eunectes notaeus (Yellow Anaconda). Diet. Herpetological Review 54 (4): 684-685.
  • Camera, Bruno F.; Everton B. P. Miranda, Raimundo P. Ribeiro-Jr., Mariano Barros, Juan Draque, Tomás Waller, Patrício A. Micucci, Cristian S. Dambros and Christine Strüssmann 2019. Historical Assumptions about the Predation Patterns of Yellow Anacondas (Eunectes notaeus): Are They Infrequent Feeders? Journal of Herpetology 53 (1): 47 - get paper here
  • Cano, Paula Daniela; Héctor Alejandro Ball, Matías Federico Carpinetto, Germán Darío Peña 2015. Reptile checklist of Río Pilcomayo National Park, Formosa, Argentina. Check List 11 (3): 1658 - get paper here
  • Carreira Vidal, Santiago 2002. Alimentación de los ofidios de Uruguay. Asoc. Herp. Esp., Monograf. Herp. 6, 127 pp. - get paper here
  • Carreira, S.; Brazeiro, A.; Camargo, A.; da Rosa, I.; Canavero, A. & Maneyro, M. 2012. DIVERSITY OF REPTILES OF URUGUAY: KNOWLEDGE AND INFORMATION GAPS. Bol. Soc. Zool. Uruguay (2a época) 21 (1-2): 9-29 - get paper here
  • Cope, E.D. 1862. Synopsis of the species of Holcosus and Ameiva, with diagnoses of new West Indian and South American Colubridae. Proc. Acad. Nat. Sci. Philadelphia 14: 60-82. - get paper here
  • Cope, E.D. 1899. Contributions to the herpetology of New Granada and Argentina, with descriptions of new forms. Philadelphia Mus. Sci. Bull. (1): 1-19 - get paper here
  • Dirksen, L. 2001. Zur Kenntnis der Anakonda-Arten (Serpentes: Boidae: Eunectes). Herpetofauna 23 (130): 22-34 - get paper here
  • Dirksen, L. & W BÖHME 1998. Studien an Anakondas 1: Indizien für natürliche Bastardierung zwischen der Großen Anakonda (Eunectes murinus) und der Paraguay-Anakonda (Eunectes notaeus) in Bolivien, mit Anmerkungen zur Taxonomie der Gattung Eunectes (Reptilia: Squamata: Serpentes: Boidae). Zool. Abh. Mus. Tierkd. Dresden, 50 (4) : 45-58.
  • Dirksen, Lutz 2002. Anakondas. Natur und Tier Verlag (Münster), 190 pp. - get paper here
  • Dirksen, Lutz 2009. Bemerkungen zu Titanoboa cerrejonensis (Head et al., 2009), einer neuen, extrem großen Riesenschlange (Serpentes, Boinae) aus der Cerrejón-Formation Kolumbiens, als Indikator für ein CO2-bedingtes Treibhausklima im Paläozän. Ophidia 3 (1): 2-10 - get paper here
  • Dirksen, Lutz and Wolfgang Böhme 1998. Studien an Anakondas 2: Zum taxonomischen Status von Eunectes murinus gigas (Latreillem 1801) (Serpentes: Boidae), mit neuen Ergebnissen zur Gattung Eunectes Wagler, 1830. Salamandra 34 (4): 359-374 - get paper here
  • Dirksen, Lutz, and Wolfgang Böhme 2005. Studies on anacondas III. A reappraisal of Eunectes beniensis Dirksen, 2002, from Bolivia, and a key to the species of the genus Eunectes Wagler, 1830 (Serpentes: Boidae). Russ. J. Herpetol. 12 (3): 223-229. - get paper here
  • Douglas, D.A.; Janke, A. & Arnason, U. 2006. A mitogenomic study on the phylogenetic position of snakes. Zoologica Scripta 35: 545–558 - get paper here
  • Dubois, A., Denzer, W., Entiauspe-Neto, O. M., Frétey, T., Ohler, A., Bauer, A. M., & Pyron, A. 2024. Nomenclatural problems raised by the recent description of a new anaconda species (Squamata, Serpentes, Boidae), with a nomenclatural review of the genus Eunectes. Bionomina 37: 8-58 - get paper here
  • Freiberg, M.A. 1982. Snakes of South America. T.F.H. Publications, Neptune City, NJ, 189 pp. - get paper here
  • Gemel, R.; G. Gassner & S. Schweiger 2019. Katalog der Typen der Herpetologischen Sammlung des Naturhistorischen Museums Wien – 2018. Ann. Naturhist. Mus. Wien, B 121: 33–248 - get paper here
  • Gonzalez R. C. et al. 2020. Lista dos Nomes Populares dos Répteis no Brasil – Primeira Versão. Herpetologia Brasileira 9 (2): 121 – 214 - get paper here
  • Hallmen, M. 2009. Ein Stück vom Paradies. Die Pouso Alegre im brasilianischen Pantanal aus Sicht eines Reptilienfreundes. Teil 2. Reptilia (Münster) 14 (77): 38-46 - get paper here
  • Kahl B, Gaupp P & Schmidt G 1980. Das Terrarium. Falken Verlag, Niederhausen (Germany), 336 pp.
  • Kluge, A.G. 1991. Boine snake phylogeny and research cycles. Publ. Mus Zool Univ Michigan 178: 1-58 - get paper here
  • Laita, Mark 2013. Serpentine. Abrams and PQ Blackwell, Auckland, New Zealand, 200 unnumbered pages
  • Leynaud, Gerardo C. and Enrique H. Bucher 1999. La fauna de serpientes del Chaco Sudamericano: diversidad, distribución geografica y estado de conservación. Academia Nacional de Ciencias Miscelanea (98):1-46
  • Luttenberger, Franz 1984. Nachzucht der Paraguay-Anakonda (Eunectes notaeus Cope 1862) im Tiergarten-Schönbrunn, Wien. Acta Zoologica et Pathologica Antverpiensia (78): 245-253
  • Machado, O. 1944. Observações sôbre ofídios do Brasil. Bol. Inst. Vital Brazil (27): 61-64 - get paper here
  • McDiarmid, R.W.; Campbell, J.A. & Touré,T.A. 1999. Snake species of the world. Vol. 1. [type catalogue] Herpetologists’ League, 511 pp.
  • Murphy, John C. & Tom Crutchfield 2019. Giant Snakes - A Natural History. Book Services, 345 pp. - 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
  • O’Shea, M. 2018. The Book of Snakes. Ivy Press / Quarto Publishing, London, - get paper here
  • Philippen, Hans-Dieter P 2014. Vielfalt ist Trumpf. Draco 16 (57): 6-15 - get paper here
  • Reed, R.N. and G.H. Rodda 2009. Giant Constrictors: Biological and Management Profiles and an Establishment Risk Assessment for Nine Large Species of Pythons, Anacondas, and the Boa Constrictor. U.S. Geological Survey, xviii + 323 pp. - get paper here
  • Reynolds, R. Graham and Robert W. Henderson 2018. Boas of the World (Superfamily Booidae): A Checklist With Systematic, Taxonomic, and Conservation Assessments. Bulletin of the Museum of Comparative Zoology Sep 2018, Vol. 162, No. 1: 1-58. - get paper here
  • Rivas, J. A., De La Quintana, P., Mancuso, M., Pacheco, L. F., Rivas, G. A., Mariotto, S., ... & Corey-Rivas, S. 2024. Disentangling the Anacondas: Revealing a New Green Species and Rethinking Yellows. Diversity, 16(2), 127
  • Santos, G.S.; T. Lema; G.R. Winck; S.Z. Cechin; R.A. Boelter. 2013. Distribution extension of the yellow anaconda Eunectes notaeus Cope, 1862 (Squamata: Boidae) in the state of Rio Grande do Sul, Brazil. Check List 9 (3):660-662 - get paper here
  • Schmidt, Dieter 2010. Vermehrung und Zucht von Riesenschlangen. Draco 11 (44): 4-17 - get paper here
  • Smith, P., Maciel, J. ., Redin Hurtado, M. ., Galeano, S. ., Stepan, N. ., Brouard, J.-P. ., Ríos, S. D. ., Ferreira Riveros, M. ., Smith, R. L. ., Owen, M. ., Nicolay, H. ., Derna, R. ., Vera Burró, A. ., Lahaye, T. ., & Cacciali, P. . 2024. Twenty-eight new and significant departmental reptile records for Paraguay Acta Zoológica Lilloana, 347–385 - get paper here
  • STARCK, J. MATTHIAS & JEANETTE WYNEKEN. 2022. Comparative and Functional Anatomy of the Ectothermic Sauropsid Heart. Veterinary Clinics: Exotic Animal Practice 25(2): 337–366. - get paper here
  • Steindachner, F. 1903. Über einige neue Reptilien- und Fischarten des Hofmuseums in Wien. Sitzungsber. Ak. Wien, math.-naturw. Cl. (Kl.) 112: 15—22 - get paper here
  • Strimple, Peter D. 1997. The Yellow Anaconda (Eunectes notaeus). Reptiles 5 (11): 60
  • Tarkhnishvili, D., Hille, A., Waller, T., Todua, M., Murtskhvaladze, M., & Böhme, W. 2022. Morphological trends and genetic divergence in anacondas, genus Eunectes Wagler, 1830 (Serpentes: Boidae). Amphibia-Reptilia, 43(4), 379-393 - get paper here
  • Trutnau, L. 1982. Einige Bemerkungen über die neuweltlichen Riesenschlangen der Gattung Eunectes Wagler 1830. Herpetofauna 4 (17): 14-21 - get paper here
  • Viana PF, Ribeiro LB, Souza GM, Chalkidis HdM, Gross MC, Feldberg E 2016. Is the Karyotype of Neotropical Boid Snakes Really Conserved? Cytotaxonomy, Chromosomal Rearrangements and Karyotype Organization in the Boidae Family. PLoS One 11 (8): e0160274.doi:10.1371/journal. pone.0160274 - get paper here
  • Vicente-Ferreira, G. S., do Nascimento, E. F., Batista, C. S., Kardush, T. A., Reyes, K. L., & Garey, M. V. 2024. Amphibians and reptiles of the Refúgio Biológico Bela Vista–Itaipu Dam, state of Paraná, southern Brazil. Biota Neotropica, 24, e20231526 - 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.
  • WALLER, T., P. A. MICUCCI & E. B. PALUMBO 1995. Distribution y conservation de la familia Boidae en el Paraguay. Autoridad CientÌfica CITES Paraguay, SecretarÌa CITES y TRAFFIC SudamÈrica. Informe Inédito. Asunción: 1-57
  • Werning, H. 2006. Im Land der Jacarés - das Pantanal. Terraria 1 (1): 72-82
  • Williams,J.D. & Scrocchi, G.J. 1994. Fauna de agua dulce de la República Argentina. Vol. 42, Fasc. 3 - Ophidia, Lepidosauria. PROFADU (CONICET) La Plata: 1-55 [Universidad Nacional de La Plata] - get paper here
  • Zaracho, Víctor Hugo; Ingaramo, María del Rosario; Semhan, Romina Valeria; Etchepare, Eduardo; Acosta, José Luis; Falcione, Ana Camila; Álvarez, Blanca 2014. Herpetofauna de la Reserva Natural Provincial Isla Apipé Grande (Corrientes, Argentina). Cuad. herpetol. 28 (2): 153-160 - get paper here
 
External links  
Is it interesting? Share with others:


Please submit feedback about this entry to the curator