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A new angiosperm from the Crato Formation (Araripe Basin, Brazil) and comments on the Early Cretaceous Monocotyledons Anais da ABC (AABC)
LIMA,FLAVIANA J. DE; SARAIVA,ANTÔNIO A.F.; SILVA,MARIA A.P. DA; BANTIM,RENAN A.M.; SAYÃO,JULIANA M..
The Crato Formation paleoflora is one of the few equatorial floras of the Early Cretaceous. It is diverse, with many angiosperms, especially representatives of the clades magnoliids, monocotyledons and eudicots, which confirms the assumption that angiosperm diversity during the last part of the Early Cretaceous was reasonably high. The morphology of a new fossil monocot is studied and compared to all other Smilacaceae genus, especially in the venation. Cratosmilax jacksoni gen. et sp. nov. can be related to the Smilacaceae family, becoming the oldest record of the family so far. Cratosmilax jacksoni is a single mesophilic leaf with entire margins, ovate shape, with acute apex and base, four venation orders and main acrodromous veins. It is the first...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Araripe Basin; Cratosmilax jacksoni; Cretaceous; Fossil leaf; Gondwana; Monocots.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000401657
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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 Anais da ABC (AABC)
FREITAS,LUÍS C.B.; MOURA,GERALDO J.B. DE; SARAIVA,ANTÔNIO A.F..
ABSTRACT 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 paleo-ecological 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...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Araripegryllus; Grylloidea; Calcareous concretions; Araripegryllus romualdoi.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000602113
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The largest flying reptile from Gondwana: a new specimen of Tropeognathus cf. T. mesembrinusWellnhofer, 1987 (Pterodactyloidea, Anhangueridae) and other large pterosaurs from the Romualdo Formation, Lower Cretaceous, Brazil Anais da ABC (AABC)
KELLNER,ALEXANDER W. A.; CAMPOS,DIOGENES A.; SAYÃO,JULIANA M.; SARAIVA,ANTÔNIO A.F.; RODRIGUES,TAISSA; OLIVEIRA,GUSTAVO; CRUZ,LILIAN A.; COSTA,FABIANA R.; SILVA,HELDER P.; FERREIRA,JENNYFER S..
A very large pterosaur (MN 6594-V) from the Romualdo Formation (Aptian/Albian), Santana Group, Araripe Basin, is described. The specimen is referred to Tropeognathus cf. T. mesembrinus mainly due to the presence of a low and blunt frontoparietal crest, the comparatively low number of teeth and the inclined dorsal part of the occipital region. Two distinct wingspan measurements for pterosaurs are introduced: the maximized wingspan (maxws), which essentially consists of doubling the addition of all wing elements and the length of the scapula or the coracoid (the smaller of the two), and the normal wingspan (nws), which applies a reducing factor (rfc) to the maximized wingspan to account for the natural flexures of the wing. The rfc suggested for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pterosauria; Anhangueridae; Tropeognathus; Cretaceous; Gondwana.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000100113
Registros recuperados: 3
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