Results 191 to 200 of about 5,200 (218)

Complete mitochondrial genome of the Ictiobus cyprinellus (Actinopterygii: Ostariophysi)

Mitochondrial DNA Part A, 2015
The complete mitochondrial genome of Ictiobus cyprinellus was first determined by a polymerase chain reaction-based sequencing method in this study. The mitochondria was 16,611 bp in length, including 13 protein genes, 2 ribosomal RNA (rRNA) genes, 22 transfer RNA (tRNA) genes and 1 control region.
Xueqing, Liu, Hejun, Du, Chuan, Wu, Kan, Xiao, Huantao, Qu, Xu, Zhang, Yong, Gao, Lei, Chen   +7 more
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Molecular phylogeny of the armored catfish family Callichthyidae (Ostariophysi, Siluriformes)

Molecular Phylogenetics and Evolution, 2004
The family Callichthyidae comprises eight genera of fishes widely distributed across the Neotropical region. In the present study, sequences of the mitochondrial genes 12S rRNA, 16S rRNA, ND4, tRNAHis, and tRNASer were obtained from 28 callichthyid specimens.
Shimabukuro-Dias, C. K., Oliveira, C., Reis, R. E., Foresti, F.   +3 more
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Ontogeny and homology of the claustra in Otophysan Ostariophysi (Teleostei)

Journal of Morphology, 2006
We studied the ontogeny of the claustrum comparatively in representatives of all otophysan subgroups. The claustrum of cypriniforms has a cartilaginous precursor, the claustral cartilage, which subsequently ossifies perichondrally at its anterior face and develops an extensive lamina of membrane bone.
Ralf, Britz, Matthias, Hoffmann
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Pressure perception inOstariophysi

Experientia, 1960
Blinde, malleuslose Elritzen beantworten unter gunstigen Umstanden schon Schwankungen von 4–7 cm Wasserdruck mit spontanen Reflexbewegungen. Druckzunahme lost — nach bestimmter Latenzzeit — Aufwartsbewegung aus, Druckabnahme Abwartsbewegung. Auch in langfristigen Dressurversuchen wurde entsprechende Reaktion auf Schwankungen bis zu 5–6 cm Wasserdruck ...
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Higher-level Names for Catfishes (Actinopterygii: Ostariophysi: Siluriformes)

1999
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Ferraris, Carl J., Pinna, Mário C. C. de   +1 more
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The pectoral anatomy of selected ostariophysi I. The characiniformes

Journal of Morphology, 1976
AbstractThe muscles and bones of the pectoral fin of Serrasalmus nattereri, the piranha, resemble those of generalized, lower teleosts with specializations related to a body shape adapted for high‐speed carnivory; the pectoral fins being highly mobile with strong ligaments to the rays.
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Analyse de la paléodiversification des Siluriformes (Osteichthyes, Teleostei, Ostariophysi)

Geobios, 1999
Understanding the evolution of the Siluriformes (osteichthyans, teleosts, ostariophysans) and their diversification is achieved through critical interpretation of the role of certain innovations in recognition of the fossil taxa and in the process of the radiation of the group.
Mireille Gayet, Olga Otero
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Spermiogenesis and spermatozoal ultrastructure in Trichomycteridae (Teleostei: Ostariophysi: Siluriformes)

Acta Zoologica, 2010
AbstractSpadella, M.A., Oliveira, C. and Quagio‐Grassiotto, I. 2009. Spermiogenesis and spermatozoal ultrastructure in Trichomycteridae (Teleostei: Ostariophysi: Siluriformes). —Acta Zoologica (Stockholm) 91: 373–389.Siluriformes comprises the most diverse and widely distributed ostariophysan group, a fish assemblage that includes about three quarters ...
Spadella, Maria Angelica, Oliveira, Claudio, Quagio-Grassiotto, Irani   +2 more
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A new Eocene citharinoid fish (Ostariophysi: Characiformes) from Tanzania

Journal of Vertebrate Paleontology, 2003
Abstract A single specimen of the anterior portion of a small fish was collected from the Eocene Mahenge site of Tanzania in 1996. The specimen, preserved as part and counterpart natural mold, is identified as belonging to a characiform fish, although the presence of a Weberian apparatus has not been confirmed beyond doubt.
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Phylogenetic Interrelationships and Reductive Evolution in Neotropical Characidiin Fishes (Characiformes, Ostariophysi)

Cladistics, 1993
Abstract—Miniaturization, which results in the presence of numerous apparently paedomorphic characters associated with reduced size, is a common phenomenon among neotropical fishes, with over 85 miniature species distributed among the five major ordinal groups. Eleven species are recognized as miniatures within the Characidiinae, a monophyletic subunit
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