ITIS Standard Report Page: Agkistrodon piscivorus piscivorus.
Yumiko Komori, Toshiaki Nikai, in Handbook of Proteolytic Enzymes (Third Edition), 2013. Name and History. Four proteinases are isolated from the venom of Agkistrodon halys blomhoffii (mamushi), found in Japan. Hemorrhagic toxin is the name given to proteinase b (HR-II); proteinase a and c are also present in this venom but are non-hemorrhagic proteinases.
Agkistrodon piscivorus conanti Gloyd, 1969 Agkistrodon piscivorus conanti, commonly known as the Florida cottonmouth or green-tailed moccasin, is a venomous pitviper subspecies in the family Viperidae. The subspecies is found in the southeastern United States, particularly in Florida.
Agkistrodon is a genus of venomous pit vipers found in North America from the United States south to northern Costa Rica. Six species are currently recognized, all of them polytypic and closely related. Common names include: cottonmouths, copperheads, and cantils.
The monophyletic Florida subspecies of A. piscivorus may be a distinct species (at 4.8% SD), whereas two western subspecies of A. contortrix also appear to constitute a single distinct species, pending additional analyses. We conclude that both species of Agkistrodon can be used as suitable ectothermic models to gauge impacts of future climate.
The head is a brown color, especially in A. p. piscivorus. Eastern populations have broad dark cheek stripe, bordered with pale line above and below. Young snakes have more prominent dark cross bands on a lighter background.
Geographic Range. Cottonmouths, Agkistrodon piscivorus, are found in the United States ranging from as far north as the James River in Virginia to the western edge of Missouri, and as far south as the Florida Keys and the western part of Texas.They are found in parts of North Carolina, South Carolina, Georgia, Kentucky, Illinois, Indiana, Tennessee and all of Louisiana, Alabama, Mississippi.
Agkistrodon contortrix is a species of venomous snake, a pit viper, endemic to Eastern North America; it is a member of the subfamily Crotalinae in the family Viperidae.