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Aspectos do desenvolvimento ovocitário no peixe-pulmonado Sul-americano, Lepidosiren paradoxa Fitzinger (Dipnoi) Zoologia
Chaves,Paulo de Tarso da Cunha.
Histological changes in the oocyte development of South American lungfish are described. During maturation, pre-vitellogenic and vitellogenic phases could be distinguished, and they are similar to those of teleost fishes.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Reproduction; Amazonian; Lepidosiren paradoxa; Dipnoi; Osteichthyes.
Ano: 1992 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751992000100011
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The clavobranchialis musculature in sarcopterygian fishes, and contribution to osteichthyan feeding and respiration Naturalis
Johanson, Zerina.
Various fossil lungfish taxa preserve distinct depressions on the smooth postbranchial lamina of the dermal pectoral girdle. These depressions are largely unknown in other sarcopterygian fishes, but are present in the rhizodont sarcopterygian Strepsodus. Comparisons with extant actinopterygian fishes suggest these depressions mark the point of origin for the clavobranchialis musculature, extending anterodorsally into the gill chamber to insert on the ventral surface of the ceratobranchial(s). Studios examining feeding and respiratory mechanisms of bony fishes (Osteichthyes) have emphasised the role of mandibular depression in generating negative pressures within the oral cavity to draw in water/air/food via suction. However, phylogenetically basal...
Tipo: Article / Letter to the editor Palavras-chave: Clavobranchiales; Sarcopterygii; Actinopterygii; Chondrichthyes; Coracobranchiales; Dipnoi.
Ano: 2003 URL: http://www.repository.naturalis.nl/record/534410
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The Permo-Carboniferous genus Sagenodus and the beginning of modern lungfish Naturalis
Schultze, H.-P.; Chorn, J..
were present in North America ( The lungfish Sagenodus is a widespread Permo-Carboniferous genus found in Europe and North America. Important localities in the U.S.A. include Middle Pennsylvanian coals near Linton, Ohio, Upper Pennsylvanian deposits near Robinson and Hamilton, Kansas, and Peoria, Illinois; Lower Permian sediments near Cameron, Ohio; and Lower Permian “Red Beds” of Texas and Oklahoma. At least three species of Sagenodus S. copeanus, S. periprion, S. serratus). S. ohiensis is represented solely by one skull. Knowledge of the osteology of Sagenodus is enhanced by the study of well-preserved but disassociated elements from Robinson, Kansas ( S. copeanus) and Little Bitter Creek, Texas (S. serratus). The orbital series is now known to be...
Tipo: Article / Letter to the editor Palavras-chave: Dipnoi; Sagenodus; Permo-Carboniferous; Systematics; Paleoecology; Phylogeny.
Ano: 1997 URL: http://www.repository.naturalis.nl/record/534319
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