Species

Our venom work continues to expand to include many species of snake, centipede, scorpion, and spider. Some of our focal species are shown below.

Snakes

For our work on intraspecific venom variation in snakes, we primarily work with five species: the Eastern Diamondback Rattlesnake (Crotalus adamanteus), the Cottonmouth (Agkistrodon piscivorus), the Pygmy Rattlesnake (Sistrurus miliarius), the Eastern Coralsnake (Micrurus fulvius), and the Timber Rattlesnake (Crotalus horridus). The first four of these are locally abundant and sympatric over much of their ranges, facilitating comparative population-genomic studies.

Crotalus_adamanteus_2 — The Eastern Diamondback Rattlesnake (*Crotalus adamanteus*) is the species we used to develop and implement all of our genomic, transcriptomic, and proteomic techniques. We know more about the venom composition and variation in this species than any other.

Agkistrodon_piscivorus_conanti_7 — We are currently working on population genomics and the characterization of venom variation in the Florida Cottonmouth (*Agkistrodon piscivorus conanti*).

Sistrurus_miliarius_barbouri_4 — We are currently working on population genomics and the characterization of venom variation in the Dusky Pygmy Rattlesnake (*Sistrurus miliarius barbouri)*

Chorr — The Timber Rattlesnake (*Crotalus horridus*) shows a drastic venom dichotomy, with some populations having typical hemorrhagic rattlesnake venom and others having a streamlined neurotoxic venom. We are studying the origin and selective forces maintaining this dichotomy.

Micrurus_fulvius_0008 — The Eastern Coralsnake (*Micrurus fulvius*).

Invertebrates

We are in the process of characterizing venom composition of numerous invertebrate species. We are primarily working on centipedes in the genera Scolopendra and Scolopocryptops, scorpions in the genera Centruroides and Hadrurus, and spiders in the genera Hogna and Phidippus. Some of the species we are working with are shown below.