A new crested maniraptoran dinosaur from the Santana Formation (Lower Cretaceous) of Brazil

The record of dinosaur body-fossils in the Brazilian Mesozoic is restricted to the Triassic of Rio Grande do Sul and Cretaceous of various parts of the country. This includes 21 named species, two of which were regarded as nomina dubia, and 19 consensually assigned to Dinosauria. Additional eight supraspecific taxa have been identified based on fragmentary specimens and numerous dinosaur footprints known in Brazil. In fact, most Brazilian specimens related to dinosaurs are composed of isolated teeth and vertebrae. Despite the increase of fieldwork during the last decade, there are still no dinosaur body-fossils of Jurassic age and the evidence of ornithischians in Brazil is very limited. Dinosaur faunas from this country are generally correlated with those from other parts of Gondwana throughout the Mesozoic. During the Late Triassic, there is a close correspondence to Argentina and other south-Pangaea areas. Mid-Cretaceous faunas of northeastern Brazil resemble those of coeval deposits of North Africa and Argentina. Southern hemisphere spinosaurids are restricted to Africa and Brazil, whereas abelisaurids are still unknown in the Early Cretaceous of the latter. Late Cretaceous dinosaur assemblages of south-central Brazil are endemic only to genus or, more conspicuously, to species level, sharing closely related taxa with Argentina, Madagascar, Indo-Pakistan and, to a lesser degree, continental Africa.

Section: Araripe Basinmentioning

confidence: 99%

Mesozoic dinosaurs from Brazil and their biogeographic implications

Bittencourt

Langer

2011

“…Outcrops around Santana do Cariri (Campos & Kellner 1991). Theropoda, Spinosauridae Irritator challengeri Martill et al 1996(see also Kellner 1996b Angaturama limai Kellner and Campos 1996 Theropoda, Coelurosauria Santanaraptor placidus Kellner 1999 Dinosauria indet. One fragmentary bone (Leonardi & Borgomanero 1981, Kellner 1996b Incomplete sacrum (Frey & Martill 1995, Kellner 1996b 8.…”

Section: State Of Cearámentioning

confidence: 99%

“…The result is a very limited number of publications about this subject and only two formally described species (Staurikosaurus pricei Colbert 1970 and"Antarctosaurus" brasiliensis Arid &Vizotto 1971). In the last five years dinosaur studies in Brazil got some impulse with the discovery of several new taxa, increasing known dinosaur diversity up to eight species (Irritator challengeri Martill et al 1996, Angaturama limai Kellner & Campos 1996, Guaibasaurus candelarai Bonaparte et al 1999, Gondwanatitan faustoi Kellner & Azevedo 1999, Saturnalia tupiniquim Langer et al 1999, & Santanaraptor placidus Kellner 1999. But this is still very little compared to other parts of the world with the same outcrops of Mesozoic (especially Cretaceous) strata.…”

Section: Final Remarksmentioning

confidence: 99%

Brief review of dinosaur studies and perspectives in Brazil

Kellner

Campos

2000

Dinosaur research is developing at very high rates around the world resulting in several new discoveries that are improving our understanding of this terrestrial reptilian clade. Except for the last couple years, the studies of Brazilian dinosaurs have not followed this expansive trend, despite the high potential of several dinosaur localities. So far there are only eight described taxa, four in the last year, representing theropod, sauropod, and one possible prosauropod taxa. Except for footprints, there are no records of ornithischian dinosaurs in the country what is at least partially explainable by the lack of continuous vertebrate fossil collecting program in the country. More funding is necessary to improve the research activities in this field.

“…The Romualdo Member, the upper unit in the Santana Formation, stands out for the quality and tridimensional preservation of its fossils in calcareous concretions, belonging to different taxonomic groups, such as Gymnosperms and Angiosperms leaves and trunks (Saraiva et al 2003, Lima et al 2012; Gastropods (Beurlen 1964); Crustaceans (Martins Neto 1987 andPinheiro et al 2013); Conchostracans (Carvalho and Viana 1993); Ostracods (Carmo et al 2004) and, especially, vertebrates: Chondrichthyes Actinopterygii (Agassiz 1841, Brito and Ferreira 1989); Testudines (Hirayama 1998, Oliveira and; Dinosauria (Kellner 1999, Kellner and Campos 1996, Martill et al 1996, Naish et al 2004; Pterosauria (Kellner 1984, Wellnhofer 1985, Kellner and Tomida 2000, Witton 2009, Bantim et al 2014andCrocodilia (Price 1959, Kellner 1987) and no insect has yet been attributed to this unit in the literature, which limits paleo-ecological inferences, since insects (especially Orthoptera) are excellent bioindicators of paleoenvironments (Martins Neto 2006).…”

Section: Introductionmentioning

confidence: 99%

First Occurrence and Paleo-Ecological Implications of Insects (Orthoptera: Ensifera Gryllidae) in the Romualdo Member of the Santana Formation, Eo-Cretaceous of the Araripe Basin

Freitas

Moura

Saraiva

2016

The Romualdo Member of the Santana Formation, a lithostatigraphic unit attributed to a marine intrusion, is famous for its preserved fossils in calcareous concretions, which stand out for their diversity and excellent preservation levels. This paper aims to record the first occurrence of the Class Insecta in the Romualdo Member of the Santana Formation of the Araripe Basin, as well as to describe and discuss the paleoecological implications of such finding. The first occurrence of the order Orthoptera (family Gryllidae) is presented for this unit. This new species is attributed to the genus Araripegryllus, that lasted throughout the deposition of the Crato Member, which is under the Romualdo Member. In reference to its statigraphic origin, the specimens was named Araripegryllus romualdoi sp. nov.