Last September I spent a day in the LACM Herpetology collections with Jessie Atterholt, looking at weird features in crocs, lizards, snakes, and salamanders. I’ll have more to say about the specific things we were looking for in a month or so, after Jessie’s given her talk at SVPCA. This was just an incidental hit. We were looking at cryptobranchid (literally “hidden gill”) salamanders, because they’re big enough that you don’t need a microscope to see all their weird features. Cryptobranchids include the North American hellbender, Cryptobranchus alleganiensis, and the giant salamanders of China and Japan, Andrias davidianus and Andrias japonicus, respectively, plus a raft of fossil taxa.

This is the mandible of LACM 162475, a specimen of Andrias davidianus, in right lateral view. I’d never spent quality time with the skeleton of a giant salamander, and I was impressed with how evil their teeth are. Just in terms of general outline, these little murder-sticks wouldn’t look out of place in the jaw of a dromaeosaur. Click to enfangenate.

Jessie did an Instagram post on the upper jaw of Cryptobranchus a few months ago, and as long as you’re over there, have a look at the half a pig head that she just plastinated for our colleagues in WesternU’s College of Veterinary Medicine. It’s not the same pig as the one we hemisected last December, but I think it got cut at the same time.