Rough-skinned newts produce tetrodotoxin or TTX, a deadly neurotoxin that is also present in some pufferfish, octopuses, crabs, starfish, flatworms, frogs, and toads. It remains a mystery why so many ...

A standard lineage-through-time (LTT) plot was constructed using the R package ape (Paradis et al., 2004) to graphically visualize and evaluate the temporal pattern of lineage diversification in ...