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A possible chelonian egg from the Brazilian late cretaceous Anais da ABC (AABC)
AZEVEDO,SERGIO ALEX; GALLO,VALÉRIA; FERIGOLO,JORGE.
This paper describes a possible fossil egg proceeding from the Bauru Group, Late Cretaceous of Paraná Basin, Brazil. External morphology, dimensions, texture and shell ornamentation examined under electron microscopy show close resemblance to the Recent podocnemidid chelonian eggs. Association with bony material in the outcrop suggests that it is related to a species of Podocnemis. Computerized tomography reveals a high density outer region corresponding to the shell component layers, and successive layers with decreasing density towards the nucleus. An area of high density in the central region may represent remains of an embryo.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fossil egg; Chelonian; Late Cretaceous; Bauru Group.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652000000200007
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An overview of the Leptolepis-like fishes from the Santana Formation, Northeastern Brazil Anais da ABC (AABC)
FIGUEIREDO,FRANCISCO J. DE; GALLO,VALÉRIA.
Tipo: Info:eu-repo/semantics/other
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000200016
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Distributional patterns of Aptian-Albian paleoichthyofauna of Brazil and Africa based on Track Analysis Anais da ABC (AABC)
PARMÉRA,THAÍS C.C.; GALLO,VALÉRIA; SILVA,HILDA M.A. DA; FIGUEIREDO,FRANCISCO J. DE.
ABSTRACT The Aptian-Albian paleoichthyofauna in Brazil and Africa is quite diverse, yet their geographic patterns still require accounts. This work consists of a panbiogeographical analysis of paleoichthyofauna from Aptian-Albian through track analysis. Geographic coordinates were obtained and converted into paleocoordinates. Individual Tracks (ITs) and Generalized Tracks (GTs) were built with the aid of ArcView GIS v3.2 program using Trazos2004 extension. As a result, four GTs and tree Biogeographic Nodes (A, B and C) had been identified. GTs 1 and 2 shows two different faunas. GT3 indicates similarity between Brazil and Africa paleoichthyofauna suggesting the break-up of Gondwana as the event that separated it. GT4 represents a probable local seaway...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aptian-Albian; Gondwana Break-up; Historical biogeography; Track analysis..
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000400501
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Distributional patterns of †Mawsoniidae (Sarcopterygii: Actinistia) Anais da ABC (AABC)
MIGUEL,RAPHAEL; GALLO,VALÉRIA; MORRONE,JUAN J..
Mawsoniidae are a fossil family of actinistian fish popularly known as coelacanths, which are found in continental and marine paleoenvironments. The taxon is considered monophyletic, including five valid genera (Axelrodichthys, Chinlea,Diplurus, Mawsonia andParnaibaia) and 11 genera with some taxonomical controversy (Alcoveria, Changxingia,Garnbergia, Heptanema,Indocoelacanthus, Libys,Lualabaea, Megalocoelacanthus,Moenkopia, Rhipis andTrachymetopon). The genera restricted to the Northern Hemisphere (Diplurus and Chinlea) possess the oldest records (Late Triassic), whereas those found in the Southern Hemisphere (Mawsonia, Axelrodichthys, andParnaibaia) extend from Late Jurassic to Late Cretaceous, especially in Brazil and Africa. We identified...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mawsoniidae; Mesozoic; Evolutionary biogeography; Track analysis.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100159
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Remarks on the enchodontid fishes from the Atlântida Formation, Pelotas Basin Anais da ABC (AABC)
COELHO,PABLO M.; GALLO,VALÉRIA; FIGUEIREDO,FRANCISCO J. DE.
Tipo: Info:eu-repo/semantics/other
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000200015
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