Fonseca's Lancehead

About the Fonseca's Lancehead

Bothrops fonsecai, also known commonly as Fonseca's lancehead, is a species of venomous snake in the family Viperidae. The species is endemic to Brazil. The specific name, fonsecai, is in honor of Dr. Flavio da Fonseca, who was head of the laboratory of parasitology at the Instituto Butantan in São Paulo, Brazil.

B. fonsecai is found in the Brazilian states of Minas Gerais, Rio de Janeiro, and São Paulo. The preferred natural habitat of B. fonsecai is forest, at altitudes up to 1,700 m (5,600 ft). Adults of B. fonsecai have a total length (including tail) of about 1 m (39 in).

B. fonsecai is terrestrial. B. fonsecai preys upon small mammals. B. fonsecai is ovoviviparous. Litter size is 14 or less. Fenwick AM, Gutberlet RL Jr, Evans JA, Parkinson CL (2009). "Morphological and molecular evidence for phylogeny and classification of South American pitvipers, genera Bothrops, Bothriopsis, and Bothrocophias (Serpentes: Viperidae)". Zoological Journal of the Linnean Society 156 (3): 617–640. (Rhinocerophis fonsecai, new combination).

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