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Eunectes beniensis DIRKSEN, 2002

IUCN Red List - Eunectes beniensis - Least Concern, LC
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Higher TaxaBoidae (Boinae), Henophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Beni Anaconda 
SynonymEunectes beniensis DIRKSEN 2002
Eunectes beniensis — WALLACH et al. 2014: 290
Eunectes beniensis — REYNOLDS & HENDERSON 2018: 21
Eunectes beniensis — DUBOIS et al. 2024 
DistributionBolivia (Beni, Pando)

Type locality: Bolivia (Beni: Trinidad)  
Reproductionovovivparous 
TypesHolotype: AMNH 101924, adult male; Paratypes: CBF 1675, NKR 1735, NKR, UMMZ 56863 
DiagnosisAdditional details, e.g. a detailed description or comparisons (1335 characters), are available for collaborators and contributors. Please contact us for details. 
CommentDistribution: see map and list of localities in Powell et al. 2023: 851-852 (Table 3, Fig. 4) and Tarkhnishvili et al. 2022: 380 (Fig. 1).

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. 
EtymologyNamed after the type locality. 
References
  • Dirksen, Lutz 2002. Anakondas. Natur und Tier Verlag (Münster), 190 pp. - 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
  • 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
  • Murphy, John C. & Tom Crutchfield 2019. Giant Snakes - A Natural History. Book Services, 345 pp. - get paper here
  • Powell RL, Eversole CB, Rivas LR, Crocker AV, De la Quintana P 2023. Feliz cumpleaños, 21 years for the Beni Anaconda, Eunectes beniensis (Dirksen, 2002) (Serpentes, Boidae): an update of voucher specimens, species’ distribution, and clarification of locality data of type specimens. Check List 19(6): 847-854 - get paper here
  • Quintana, Paola De la; Jesús A. Rivas, Federico Valdivia and Luis F. Pacheco 2017. Home range and habitat use of Beni anacondas (Eunectes beniensis) in Bolivia. Amphibia-Reptilia, 38(4): 547-553. - 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
  • Rivas, L. R., Eversole, C. B., & Powell, R. L. 2023. Urban herpetofauna of Trinidad, Beni Department, Bolivia. Herpetology Notes, 16, 399-410
  • 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
  • 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.
 
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