Just because I work on archosaurs does not make me immune to the charms of other fossils (well, not quite all of them anyway). Who, after all, could be anything but charmed and intrigued by the lower jaw of Helicoprion? This ancient shark has perhaps the oddest dental arrangement of any vertebrate and probably had the most expensive dental bills.
While we are on aquatic non-tetrapodan vertebrates do also check out the news on the new giant filter-feeding fish that’s just out. Featuring research by the wonderful Jeff Liston and art from Musings buddy Bob Nicholls.