Report on the effect of the venom of the Colubrid snake the 'Ratonel', Pseudoboa neuwiedii

Hans E.A. Boos


The Ratonel or Ratonero, Pseudoboa neuweidii is a fairly common sake in Trinidad. The young are distinctly marked, being bright pink or red on the body, having a dark brown or black head. and there is a collar of dirty-white or yellow separating the head and body colours. The belly is white. In the adult, the colours fade to a pinkish-brown on the body with a dark brown head. The pale collar is missing. It bdongs to the group of the Colubrids, the Boiginae. which are known to have some degree of venom which is delivered from modified, enlarged, grooved teeth situated in the back of the upper jaw. Very little is known of the amount of venom these snakes can inject in a bite or the effect on animals other than the usual prey. An indication of the potency of the venom of the Ratonel, and thereby of two of its closest relatives in Trinidad, the Black Cribo, Clelia clelia, and the False Coral, Oxyrhopus petola, is suggested by the following events.

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