Cretaceous–Tertiary boundary ostracodes from the Poty quarry, Pernambuco, northeastern Brazil

New dyrosaurid crocodylomorph and evidences for faunal turnover at the K–P transition in Brazil

“…The lower portion of the sedimentary sequence is formed by the Maastrichtian Gramame Formation that is overlain by the Early Palaeocene Maria Farinha Formation. Guarinisuchus munizi was found 11 m above the K-P boundary in layers whose age, established based on microfossils, is regarded as the P2 biozone of the Late Danian (Fauth et al 2005) New dyrosaurid from the K-P transition in Brazil J. A.…”

“…Casts at the Museu Nacional Type locality, horizon and age. The Poty Quarry is located in the region of Paulista (7854 0 47 00 S,34851 0 00 00 W), north of Recife, Pernambuco State; Maria Farinha Formation, Paraíba Basin; Early Palaeocene (Late Danian; Albertão et al 1994;Stinnesbeck & Keller 1995;Fauth et al 2005).…”

Ostracoda and foraminifera from Paleocene (Olinda well), Paraíba Basin, Brazilian Northeast

“…In the lower portion, it consists mostly of limestone and, in the upper, the incidence of siliciclastic rocks is higher. For this study, samples were chosen from the Paleocene, which was correlated using the distribution of the ostracod fauna of Fauth et al (2005) and the international foraminiferal biostratigraphical framework by Gradstein et al (2012) 1979 Cytherella piacabucuensis. Neufville, p. 137-138, Pl.…”

“…Oxygen isotope data corroborate this interpretation, showing a slight increase of temperature during the Cretaceous-Paleogene transition, followed by a slight temperature decrease in the Paraíba Basin (Nascimento et al 2011). The Paleogene deposits of the Paraíba Basin are interpreted as shallow marine environments connected with a regressive event (lowstand system tract) (e.g., Mabesoone et al 1991, Barbosa et al 2003, Fauth et al 2005, Córdoba et al 2007). This event is interpreted as a regression forced by the combination of eustatic sea level fall (Haq 2014) and local rising tectonic processes (Barbosa et al 2003).…”

“…and Soudanella laciniosa Apostolescu 1961. A more comprehensive study, carried out by Fauth et al (2005), reported abundant and diverse ostracod assemblages composed of 17 species, with three of them described as new. According to Fauth (2002), the Paleocene ostracod fauna has strong affinities with north, central and southern of South America, and west, north and central Africa.…”