Results 161 to 170 of about 1,575 (199)

Herpetichthyes, Amphibioidei, Choanichthyes or Sarcopterygii? [PDF]

Nature, 1955
DURING recent decades, our ideas on the classification of fishes have changed greatly. In the early years of the century, it was believed that among the higher bony fishes (Osteichthyes), the ray-finned forms and crossopterygians were closely allied, and that the lungfishes were remote from the two, representing a presumably primitive if aberrant group.
N B Marshall, Ethelwynn Trewavas
exaly   +3 more sources

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
Vincent Dupret, Daniel F. Goujet, Gael Clement   +2 more
exaly   +3 more sources

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The Oldest Known Stegocephalian (Sarcopterygii: Temnospondyli) From Spain

Journal of Vertebrate Paleontology, 2006
ABSTRACT More data are provided on the recently described temnospondyl Iberospondylus schultzei from the Upper Carboniferous (Stephanian C) of the Spanish Puertollano Basin. It represents the only known occurrence of a Paleozoic stegocephalian in a Spanish basin.
Michel Laurin, Rodrigo Soler-Gijón
exaly   +3 more sources

Sarcopterygii

2006
exaly   +2 more sources

Diversity of Extinct and Living Actinistian Fishes (Sarcopterygii)

Environmental Biology of Fishes, 1991
A total of 121 actinistian species belonging to 47 genera and 17 undetermined actinistians is reported from the literature. There are 69 valid species with fair assessment of their phylogenetic position; 21 valid species with poor assessment of their phylogenetic position; 31 actinistian incertae sedis; and 18 taxa that had been identified incorrectly ...
Richard Cloutier, Peter L. Forey
openaire   +1 more source

IV SARCOPTERYGII, Fleischflosser

2014
Unter den rezenten und fossilen Fischen sind die Sarcopterygier durch fleischige Loben an den paarigen Flossen charakterisiert. Fossil gehen sie bis in das Obere Silur (vor 420 Mio. Jahren) zuruck.
Wilfried Westheide, Gunde Rieger
openaire   +1 more source

Paired Fin Skeletons and Relationships of the Fossil Group Porolepiformes (Osteichthyes: Sarcopterygii)

Zoological Journal of the Linnean Society, 1989
Paired fin skeleton and relationsships of the fossil group Porolepiformes (Osteichtyes: Sarcopterygii).
Per E. Ahlberg
exaly   +2 more sources

Ultrastructure of Spermatozoa: Sarcopterygii

2009
exaly   +2 more sources

Sarcopterygii and the Origin of Tetrapods

1977
The affinities of land vertebrates have been discussed many times, the history of the issue in itself being an interesting subject. It is not necessary at the moment to go into details; let us only recall that the important paper of Jarvik (1942), as well as the long series of later publications by this author (e.g.
openaire   +1 more source