Abstract
Se describen dientes aislados de terópodos referidos a Abelisauridae indet. y Carcharodontosauridae cf., procedentes de la Formación Presidente Prudente del Campaniano-Maastrichtiano, en el oeste del estado de San Pablo, Brasil. Los materiales son comparados con dientes de dinosaurios gondwánicos del Cretácico tardío, y cuyas afinidades son aquí discutidas. Estos dientes de dinosaurios carnívoros son significativos debido a que su presencia es pobremente conocida en el Cretácico tardío del oeste del estado del San Pablo, excepto por unos pocos huesos.
Highlights
Theropod teeth are well-documented elements in the fossil record of dinosaurs
Teeth are the most common fossils recovered in any vertebrate site due to their structure - an internal soft pulp inside a dentine which is covered by an outer layer of hard enamel
Bone fragments are quite common in Alfredo Marcondes (São Paulo State, Brazil), most of them are too fragmentary for identification down to generic or specific levels
Summary
Theropod teeth are well-documented elements in the fossil record of dinosaurs. Teeth are the most common fossils recovered in any vertebrate site due to their structure - an internal soft pulp inside a dentine which is covered by an outer layer of hard enamel. This layer is more resistant to intemperism than the outer layers of bones, the periosteum, allowing a better preservation on the fossil record compared to bones. Cretaceous theropod record in Brazil is scarce, being composed of five known species: Irritator challengeri Martill, Cruickshank, Frey, Small & Clarke, 1996, Santanaraptor placidus Kellner, 1999; Mirischia asymmetrica Naish & Frey, 2004;.
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