|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|C. F. Kammerer and K. D. Angielczyk 2009||Autapomorphies of Geikiinae recognized in common by Angielczyk (2007), Fröbisch (2007), and Fröbisch & Reisz (2008) are: 1) transverse ridge across snout at level of prefrontals present; (2) parietal foramen surrounded by a strong, often rugose boss; (3) parietals exposed on skull roof and postorbitals steeply placed on the lateral sides of the skull and concave laterally.|