Eunectes deschauenseei

Eunectes deschauenseei is a non-venomous boa species endemic to northeastern South America. No subspecies are currently recognized.[3]

Eunectes deschauenseei

Data Deficient  (IUCN 3.1)[1]
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Boidae
Genus: Eunectes
Species:
E. deschauenseei
Binomial name
Eunectes deschauenseei
Dunn & Conant, 1936[2]
Dark spotted anaconda natural range
Common names: dark-spotted anaconda,[1][3] De Schauensee's anaconda.[4]

Taxonomy

The specific name, deschauenseei, is in honor of American ornithologist Rodolphe Meyer de Schauensee,[5] who donated a specimen to the Philadelphia Zoo in 1924.[3] The type locality given is "probably collected on the island of Marajo at the mouth of the Amazon".[2]

Distribution and habitat

Eunectes deschauenseei is found in South America, in north Brazil (Pará and Amapá states) and French Guiana.[1][3] E. deschauenseei is a semi-aquatic species usually found in swampy, seasonally flooded freshwater areas at elevations below 300 m (980 ft).[1]

Description

Adult males measure 130–211 cm (51–83 in) and adult females 120–231 cm (47–91 in) in snout–vent length.[6]

Reproduction

Vitellogenesis in E. deschauenseei probably occurs from autumn to spring (May to December). Gestation may last as long as nine months. Litter size among five gravid females ranged from 3 to 27 (mean 10.6). Newborns measure 29–53 cm (11–21 in) in snout–vent length.[6]

Conservation

The savanna habitat of E. deschauenseei is highly threatened by agricultural expansion, but the threat posed on this species is not known.[1]

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References
  1. Dirksen, L. (2010). "Eunectes deschauenseei". IUCN Red List of Threatened Species. 2010: e.T176262A7207195. doi:10.2305/IUCN.UK.2010-4.RLTS.T176262A7207195.en.
  2. McDiarmid RW, Campbell JA, Touré T (1999). Snake Species of the World: A Taxonomic and Geographic Reference, Volume 1. Washington, District of Columbia: Herpetologists' League. 511 pp. ISBN 1-893777-00-6 (series). ISBN 1-893777-01-4 (volume).
  3. Eunectes deschauenseei at the Reptarium.cz Reptile Database. Accessed 10 September 2018.
  4. Amazon Anaconda at Mark O'Shea. Accessed 1 December 2008.
  5. Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press.xiii + 296 pp. ISBN 978-1-4214-0135-5. (Eunectes deschauenseei, p. 70).
  6. Pizzatto, Lígia & Marques, Otavio A. V. (2007). "Reproductive ecology of Boinae snakes with emphasis on Brazilian species and a comparison to pythons". South American Journal of Herpetology. 2 (2): 107–122. doi:10.2994/1808-9798(2007)2[107:reobsw]2.0.co;2.

Further reading
  • Dirksen L, Henderson RW (2002). "Eunectes deschauenseei ". Catalogue of American Amphibians and Reptiles 755.1–755.3.
  • Dirksen L (2002). Anakondas. Monographische Revision der Gattung Eunectes (Wagler, 1830). Münster: Natur und Tier-Verlag. 187 pp. ISBN 3-931587-43-6. (in German).
  • Dirksen L (1999). "Zur Kenntnis der Anakonda-Arten (Serpentes: Boidae: Eunectes ). I. Eunectes deschauenseei Dunn & Conant, 1936 ". Herpetofauna, Weinstadt 21 (122): 12–21. (in German).
  • Dunn ER, Conant R (1936). "Notes on anacondas, with descriptions of two new species". Proc. Acad. Nat. Sci. Philadelphia 88: 503–506. (Eunectes deschauenseei, new species).
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