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Porthidium
Porthidium is a genus of venomous pitvipers found in Mexico and southward to northern South America.[1] The name is derived from the Greek words portheo and the suffix -idus, which means "destroy" and "having the nature of"; apparently a reference to the venom.[2] Seven species are currently recognized.[3] Additional recommended knowledge
DescriptionThis is a groups of group of small species, adults ranging in size from 55 cm (P. dunni and P. yucatanicum) to 75 cm in length (P. lansbergii and P. ophryomegas). In addition, the body shape ranges from relatively slender (P. ophryomegas) to relatively stout (P. nasutum). All have a sharply defined canthus rostralis and a rostral scale that is higher than it is broad. The tip of the snout may slightly to moderately elevated (P. hespere, P. lansbergii, P. ophryomegas and P. volcanicum), strongly elevated (P. dunni and P. yucatanicum), or not elevated at all.[2] All species have a color pattern that usually consists of brown or gray color overlaid with a series of dark paraventral blotches that are separates by a pale and narrow vertebral stripe. The blotches are square, rectangular or triangular in shape. With some species, the color pattern is determined by the sex.[2] Geographic rangeFound in Mexico (Colima, Oaxaca and Chiapas on the Pacific side, the Yucatan Peninsula on the Atlantic side) southward through Central America to northern South America (Ecuador in the Pacific lowlands, northern Venezuela in the Atlantic lowlands).[1] Species
*) Not including the nominate subspecies (typical form). See also
References
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Porthidium". A list of authors is available in Wikipedia. |