Fig. 3 in BSeptal compass^ and Bseptal formula^: a new method for phylogenetic investigations of the middle ear region in the squirrel-related clade (Rodentia: Mammalia)

Fig. 3 Patterns of Bprimary septa^ and Bsecondary septa^ in the epitympanic recess and the tympanic cavity in the squirrel-related clade, †Palaeosciurus feignouxi, †Ischyromys typus, and investigated outgroups: pmd posterior medial diverticulum, filled square character present, white square character absent, question mark character not preserved. Species of investigated glirids: group I:= Glis glis; group II= Dryomys nitedula intermedius, Eliomys quercinus, and Graphiurus parvus; group III= Muscardinus avellanarius. Schemas of septal compass