Results 201 to 210 of about 2,788 (258)

A standardized terminology of spines in the order Siluriformes (Actinopterygii: Ostariophysi) [PDF]

Zoological Journal of the Linnean Society, 2021
Abstract A standardized terminology for the anatomy of pectoral- and dorsal-fin spines in the order Siluriformes is proposed based on an extensive literature review and direct examination of representatives of the order. The adult anatomy of the spines is described in detail.
Gustavo A Ballen, Mario C C De Pinna
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On the diploid state of the fish order Ostariophysi

Chromosoma, 1968
Our previous study on the order Ostariophysi was limited to members of the family Cyprinidae, suborder Cyprinidea. It was shown that the carp and the goldfish with 104 chromosomes and a DNA value of 50% that of mammals are tetraploid, as the diploid species of this family has 50–52 chromosomes and a 25% DNA value. In order to obtain some idea as to how
Susumu Ohno, Niels B Atkin, N B Atkin
exaly   +3 more sources

Spermatic cell characteristics in Gymnotiformes (Teleostei: Ostariophysi) and their phylogenetic meaning [PDF]

Journal of Fish Biology, 2009
Spermatic characteristics were studied in representatives of the families Rhamphichthyidae, Sternopygidae and Apteronotidae, and compared with pre‐existent data from Gymnotidae and Hypopomidae. The spermatic characteristics found in Gymnotiformes were also compared with data from other Ostariophysi spermatic cells.
Franca, G. F., Oliveira, C., Quagio-Grassiotto, I.   +2 more
core   +8 more sources

Schreckreaktion und Schreckstoffzellen bei Ostariophysi und Gonorhynchiformes

Journal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology, 1967
1. Nach fruheren Erfahrungen mit 200 Fischarten (109 Ostariophysi, 91 Arten aus anderen Ordnungen, „Nicht-Ostariophysen“) sind Schreckreaktion, Schreckstoff und Schreckstoffzellen auf die Ostariophysi beschrankt und innerhalb dieser Ordnung sehr weit verbreitet.
Wolfgang Pfeiffer, Pfeiffer Wolfgang
exaly   +2 more sources

Microanatomy of the paired‐fin pads of ostariophysan fishes (Teleostei: Ostariophysi)

Journal of Morphology, 2012
AbstractMembers of the teleost superorder Ostariophysi dominate freshwater habitats on all continents except Antarctica and Australia. Obligate benthic and rheophilic taxa from four different orders of the Ostariophysi (Gonorynchiformes, Cypriniformes, Characiformes, and Siluriformes) frequently exhibit thickened pads of skin along the ventral surface ...
, Nathan K Lujan, John G Lundberg
exaly   +3 more sources

Speculation on the History of the Ostariophysi

Copeia, 1930
J T Nichols
exaly   +2 more sources

OSTARIOPHYSI

1933
exaly   +2 more sources

A Large, Freshwater Chanid Fish (Ostariophysi: Gonorynchiformes) from the Upper Cretaceous of Madagascar

Journal of Vertebrate Paleontology, 2023
Isolated fossil bones from freshwater Upper Cretaceous (Maastrichtian) deposits in the Mahajanga Basin of northwestern Madagascar are identified as belonging to a gonorynchiform fish.
Alison M. Murray, D. Brinkman, Matt Friedman, David W. Krause   +3 more
semanticscholar   +1 more source

Some characteristic otoliths of American ostariophysi

Journal of Morphology, 1940
exaly   +2 more sources