Youngoides minor (Broom and Robinson 1948). Lower and wider than other specimens named Youngoides, RC91 was derived from a sister to Orovenator and the BPI 8539 specimen of Youngina. It was basal to three clades: Protorosaurus (Protorosauria), Youngina AMNH 5561 (Pararchosauriformes) and Youngoides UC 1528 (Euarchosauriformes).
Distinct from other Youngina/Youngoides specimens, the skull of the RC91 specimen of Youngoides minor has slightly constricted rostrum in dorsal view. The jawline is convex. The orbit enters the anterior half of the skull. The supratemporal and postorbital contact and the posterior jugal descends. It is among the smallest specimens.
Other Youngina/Youngopsis/Youngoides specimens are also shown above, all known from skulls and partial skulls.
RC = Rubidge Collection, Wellwood, Graaff Reinet, South Africa. |
