Edestus

Already another 'clades' post, but this time one with a few more figures at least! This one will be Euchondrocephali--a group of shark-like chondrichthyan fish that are more closely related to the holocephalans (the modern ratfish Chimaera and elephantnose fish Callorhinchus). The funny thing is that for the longest time, these fish were assumed to be part of the true shark lineage (elasmobranchs)...or somehow basal to them, or a sister group to them. Then further research and some better fossil…