Morphotype V, Bonaparte & Novas, 1985

Morphotype V

Teeth grouped in this morphotype resemble those from the mesial dentition of noasaurid theropods. They are similar to typical abelisaurid mesial teeth, but differ from them in their very small size (<1 cm), strongly lingually deflected mesial carina, which faces lingually (the mesial denticles point lingually), a single concave surface adjacent to the distal carina on the lingual surface, and a cross-sectional outline between a salinon and a D-shaped outline.

Identification: A tooth of this morphotype is identified as belonging to the mesialmost dentition of a juvenile abelisaurid. It differs from noasaurid mesial teeth in having a DSDI close to one and the absence of a constriction between the crown and root, flutes on the lingual surfaces, and poorly developed mesial denticles or an unserrated mesial carina, making the referral to this clade unlikely.

Specimen from Ibirá, São Paulo state, Adamantina Formation : LPP-PV 1150 ( Fig. 17 View Figure 17 ).