Results 41 to 50 of about 1,490 (199)

The Tatuí Formation (Early Permian, Paraná Basin), Brazil: Paleontology and Paleoenvironmental Considerations

Earth Sciences Research Journal, 2015
The Tatuí Formation, one of the Brazilian Paraná Basin geological units, is developed solely in the State of São Paulo, southeast Brazil. It is studied herein, through outcrops at the eastern border of the basin, which are siltstones and fine sandstones,
Artur Chahud, Setembrino Petri
doaj   +1 more source

An onychodont fish (Osteichthyes, Sarcopterygii) from the Early Devonian of China, and the evolution of the Onychodontiformes [PDF]

Proceedings of the Royal Society B: Biological Sciences, 2009
Although the superbly preserved specimens ofOnychodus jandemarraihave greatly advanced our understanding of the Onychodontiformes, a primitive sarcopterygian group with large parasymphysial tooth whorls, the scarcity of the otoccipital material in the group hampers further morphological comparisons between onychodonts and other sarcopterygian groups ...
Jing, Lu, Min, Zhu
openaire   +3 more sources

Confocal Characterization of Intestinal Dendritic Cells from Myxines to Teleosts

Biology, 2022
Dendritic cells (DCs) are antigen-presenting cells (APCs) that regulate the beginning of adaptive immune responses. The mechanisms of tolerance to antigens moving through the digestive tract are known to be regulated by intestinal DCs.
Alessio Alesci, Gioele Capillo, Angelo Fumia, Emmanuele Messina, Marco Albano, Marialuisa Aragona, Patrizia Lo Cascio, Nunziacarla Spanò, Simona Pergolizzi, Eugenia Rita Lauriano   +9 more
doaj   +1 more source

Evolutionary history of glucose-6-phosphatase encoding genes in vertebrate lineages: towards a better understanding of the functions of multiple duplicates

BMC Genomics, 2017
Background Glucose-6-phosphate (G6pc) is a key enzyme involved in the regulation of the glucose homeostasis. The present study aims at revisiting and clarifying the evolutionary history of g6pc genes in vertebrates.
Lucie Marandel, Stéphane Panserat, Elisabeth Plagnes-Juan, Eva Arbenoits, José Luis Soengas, Julien Bobe   +5 more
doaj   +1 more source

First Devonian dipnoans (Vertebrata, Sarcopterygii) from Spitsbergen

Comptes Rendus Palevol, 2006
For the first time, dipnoan remains are described from the Devonian of Spitsbergen. According to the stratigraphy and the associated vertebrate fauna, they are considered as Late Emsian–Early Eifelian in age. Unfortunately remains are too sketchy and non-diagnostic to be referred or compared to a known Devonian dipnoan. This new material, determined as
Clément, G., Dupret, V., Goujet, D., Pernègre, V., Roy, J.-C.   +4 more
openaire   +2 more sources

The first draft genome assembly and data analysis of the Malaysian mahseer (Tor tambroides)

Aquaculture and Fisheries, 2023
The Malaysian mahseer (Tor tambroides), one of the most valuable freshwater fish in the world, is mainly targeted for human consumption. The mitogenomic data of this species is available to date, but the genomic information is still lacking.
Melinda Mei Lin Lau, Leonard Whye Kit Lim, Hung Hui Chung, Han Ming Gan   +3 more
doaj   +1 more source

On the type material of Lepidosiren paradoxa Fitzinger, 1837 (Sarcopterygii, Dipnoi)

Comptes Rendus. Biologies, 2010
Lepidosiren paradoxa , the first living dipnoan to be discovered, was first described from two specimens collected by Johann Natterer during his 18-year expedition in Brazil. Those specimens were first studied by Fitzinger and Bischoff, but few data are available to identify the syntypes of L.
Lúcio Paulo, Machado, Helmut, Wellendorf, Paulo M, Brito   +2 more
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(Sarcopterygii; Porolepiformes) from eastern Gondwana

, 2013
Porolepiformes (Sarcopterygii) are poorly represented in the Devonian of Australia and eastern Gondwana as a whole. New cosmine-covered lower jaws from the Mulga Downs Group, western New South Wales (?Pragian-Emsian or Eifelian), represent the first ...
Zerina Johanson, Ritchie, Alex, Ahlberg, Per Erik,, Alex Ritchie, Johanson, Zerina, Per Erik Ahlberg   +5 more
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Sarcopterygii do Eopermiano da Bacia do Paraná, Estado de São Paulo [PDF]

, 2012
This contribution comprises a review of Early Permian Sarcopterygii (Coelacanthimorpha - coelacanths; Tetrapodomorpha - Osteolepimorpha and tetrapods) of the Paraná Basin in the state of São Paulo.
Chahud, Artur, Petri, Setembrino
core   +1 more source

Evolution and differential expression of a vertebrate vitellogenin gene cluster

BMC Evolutionary Biology, 2009
Background The multiplicity or loss of the vitellogenin (vtg) gene family in vertebrates has been argued to have broad implications for the mode of reproduction (placental or non-placental), cleavage pattern (meroblastic or holoblastic) and character of ...
Kongshaug Heidi, Kolarevic Jelena, Finn Roderick, Nilsen Frank   +3 more
doaj   +1 more source