| is hybridization a source of adaptive venom variation in rattlesnakes? a test, using a crotalus scutulatus × viridis hybrid zone in southwestern new mexico. | venomous snakes often display extensive variation in venom composition both between and within species. however, the mechanisms underlying the distribution of different toxins and venom types among populations and taxa remain insufficiently known. rattlesnakes (crotalus, sistrurus) display extreme inter- and intraspecific variation in venom composition, centered particularly on the presence or absence of presynaptically neurotoxic phospholipases a₂ such as mojave toxin (mtx). interspecific hybri ... | 2016 | 27322321 |