Dwarf water cobra
| Dwarf water cobra | |
|---|---|
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Squamata |
| Suborder: | Serpentes |
| Family: | Elapidae |
| Genus: | Naja |
| Subgenus: | Boulengerina |
| Species: | N. nana
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| Binomial name | |
| Naja nana Collet & Trape, 2020[1]
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| Distribution of the dwarf water cobra | |
The dwarf water cobra (Naja nana) is a small, venomous species of aquatic cobra found in the Democratic Republic of Congo (Katanga). It was first described by Marcel Collet and Jean-Francois Trape in 2020, based on two specimens from Lake Mai-Ndombe.
Taxonomy
[edit]Naja nana is classified under the genus Naja of the family Elapidae, and considered a member of the Boulengerina subgenus, along with related species such as Naja annulata, Naja christyi, and Naja melanoleuca. The genus name Naja is a Latinisation of the Sanskrit word nāgá (नाग), meaning "cobra”; the species name nana derives from the Latin word, nanus, which means feminine, in reference to its small size.
Description
[edit]The dwarf water cobra typically doesn't grow longer than 1 m (3.3 ft),[2] unlike the two other semiaquatic African Naja species, Naja annulata and Naja christyi, both of which can attain lengths of up to about 2.5 m (8.2 ft).[3]
Distinguishing features of the species include its characteristic defensive posture, its aquatic lifestyle, the straight-row arrangement of its dorsal scales, and its distinctive coloration: black with small white or yellowish spots, a whitish abdomen, and a black underside of the tail.[1]
The eggs of the dwarf water cobra are large and elongated, and require 70 days of incubation to hatch.[4]
Behavior
[edit]Dwarf water cobras can swim and climb, but generally prefer a terrestrial habitat, although they will hunt and defecate in water when able.[5] In the wild they are exclusively piscivorous,[6][3] although in captivity they are often fed a rodent-based diet.[5] One case of cannibalism of a conspecific snake is known.[3]
References
[edit]- ^ a b Uetz, P; Hallermann, J. "Naja nana COLLET & TRAPE, 2020". Reptile Database. Retrieved 31 October 2021.
- ^ Trape, J.F; Collet, M (2020). "A new and remarkable species of semi-aquatic naja (Elapidae, subgenus Boulengerina Dollo, 1886) from the Democratic Republic of Congo". Bulletin de la Société Herpétologique de France. 173: 41–52. Archived from the original on 8 March 2018. Retrieved 31 October 2021.
- ^ a b c Spawls, S; Howell, K; Hinkel, H; Menegon, M (27 March 2018). A Field Guide to East African Reptiles (2 ed.). London: Bloomsbury Natural History. p. 624. ISBN 978-1472935618. Retrieved 31 October 2021.
- ^ Raw, LR; Deacon, R (27 June 2021). "Two additional specimens of Naja (Boulengerina) nana (Serpentes: Elapidae) with notes on captive husbandry and behaviour". Occasional Papers in Zoology. 9: 1–8. doi:10.5281/zenodo.5103417. Retrieved 31 October 2021.
- ^ a b Raw, LR; Deacon, R (27 June 2021). "Two additional specimens of Naja (Boulengerina) nana (Serpentes: Elapidae) with notes on captive husbandry and behaviour". Occasional Papers in Zoology. 9: 1–8. doi:10.5281/zenodo.5103417. Retrieved 31 October 2021.
- ^ Chippaux, J.P; Jackson, K (18 June 2019). Snakes of Central and Western Africa. United States: Johns Hopkins University Press. p. 448. ISBN 978-1421427195.