MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
New lizard record (Diapsida, Lepidosauria) from the Upper Cretaceous Adamantina Formation, Brazil
CARLOS RA CANDEIRO, WILLIAM NAVAS, AGUSTÍN G. MARTINELLI, ANALÍA M. FORASIEPI, CARLOS A. SCANFERLA, PAULA MUZZOPAPPA
Bulletin of Geosciences
Año: 2009 vol. 84 p. 573 - 573
A new record of a Late Cretaceous lizard-like non-serpentiansquamate from Adamantina Formation (Bauru Group;Turonian-Santonian) southeast of Brazil is based on a specimenfound about 10 km south of Marília city (São Paulo State). Thematerial consists of 10 articulated dorsal vertebrae with a totallength of 14 mm and seven incomplete right ribs. Vertebrae aregracile, procoelous, with a broad intervertebral foramen, withoutevidence of intercentra, and with a single synapophysis; ribs areunicapitate. The specimen is assigned to the Squamata because ofthe presence of procoelous vertebrae, absence of intercentra in thedorsal vertebrae, and the presence of slender and elongate single-headed ribs. In addition, the material is excluded from theSerpentes owing to the absence of separated diapophyses andparapophyses, the lack of clearly triangular centra in ventral view,presence of anteroposterior short and well posteriorly-inclinedneural spines, and, if it is present, the weakly developedzygosphene-zygantrum articular complex. Despite retaining anopen taxonomic identification, the material represents the firstnon-serpentian squamate from the Adamantina Formation, enlargingthe record of squamates in the Bauru Group of Brazil, andindicates the presence of minute lizard taxa, which are sparse inthe South American Cretaceous fossil record.