Figure 1

Cladogram depicting terapontid generic relationships derived from comparative morphology, adapted from Vari [42]. Cladogram depicting terapontid generic relationships derived from comparative morphology, adapted from [42], showing intestinal convolution and dentition characters used to differentiate genera. Note that Amniataba, Hannia and Variichthys form an unresolved trichotomy. Vari [42] also identified two distinct sub-clades within the genus Hephaestus – “genus a” which develops a “6-loop” intestinal pattern, and “genus b” which retains the plesiomorphic “2-loop” intestine.