Two additional specimens of Naja (Boulengerina) nana (Serpentes: Elapidae) with notes on captive husbandry and behaviour

Two additional specimens of the newly described species of water cobra Naja (Boulengerina) nana Collet & Trape, 2020, from Lac Mai-Ndombe in the western Democratic Republic of the Congo are described. Since both specimens are longer than any of the type series and both also exhibit some variation from the type series, this paper serves to draw attention to this variation while also providing additional information on the captive husbandry and biology of the species. Both specimens have unusual anal arrangements. The female also has unusual fusions of the 6th supralabials with the anterior and lower posterior temporals and only two rather than three supralabials in contact with the nasal. Observations on the husbandry, diet, reproduction and behaviour of captives are also provided.