Morphotype III, Bonaparte & Novas, 1985

Morphotype III

This morphotype includes a series of teeth intermediate in morphology between morphotypes I and II and representing abelisaurid transitional teeth. Similar to the lateral teeth in terms of crown ornamentations and denticle size and morphology, they differ in that the crown is slightly thicker (CBR ranging from.55 to.7), sometimes lingually curved, and more asymmetrical. They have concave surfaces next to the mesial and/ or distal carinae on the lingual surface, conferring a transitional cross-sectional outline between the clear parlinon and the lenticular outline (e.g. salinon-shaped outline). The mesial carina can be straight or slightly twisted lingually.

Identification: The isolated dental material grouped in morphotype III is most likely to represent transitional crowns situated between the more mesial and lateral teeth of young, subadult to adult abelisaurids.

Specimens from Uberaba, Minas Gerais state, Marília Formation : CPP 020 , CPP 198 ( Fig. 11 View Figure 11 ), CPP 199 , CPP 205 , CPP 376 , and MCT.R. 1959 .

Specimens from Ibirá, São Paulo state, Adamantina Formation : LPP-PV 1107 , LPP-PV 1125 , LPP-PV 1110 , LPP-PV 1131 , and LPP-PV 1132 .

Specimen from Chapada dos Guimarães, Mato Grosso state, Marília Formation : MN 4567-V .

Specimen from Presidente Bernardes, São Paulo state, Adamantina Formation : MN 4990-V/A .

Specimens from Prata, Minas Gerais state, Adamantina Formation : MN 6264-V/A ( Fig. 12 View Figure 12 ), MN 6264-V/B , MN 6268-V , MN 6272-V , MN 6273-V , MN 6279-V , and MN 6280-V .

Specimens from Tesouro, Mato Grosso state, Marília Formation : MN 6816-V , MN 6824-V ( Fig. 13 View Figure 13 ), MN 6836-V , and MN 7231-V .

Specimens from Monte Alto, São Paulo state, Marília Formation : MPMA 4 , MPMA 5 , MPMA 7 , MPMA-12-00D3-97 , MPMA-12-00D8-97 , MPMA-12-0D10-97 , MPMA-12-0D11-97 , MPMA-12-0D12-97 , and MPMA-12-00D6-97 .

Specimen from Alfredo Marcondes, São Paulo state, Adamantina Formation : UFRJ-DG 376-Rd .