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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)  
Reproductionovoviviparous 
TypesHolotype: AMNH 101924, adult male; Paratypes: CBF 1675, NKR 1735, NKR, UMMZ 56863 
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 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 - get paper here
  • 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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