Osteology and myology of the cephalic region and pectoral girdle of Cetopsis coecutiens Spix & Agassiz, 1829, comparison with other cetopsids, and comments on the synapomorphies and phylogenetic position of the Cetopsidae (Teleostei : Siluriformes)

Diogo, Rui; Chardon, Michel; Vandewalle, Pierre

Article (Scientific journals)

Diogo, Rui; Chardon, Michel; Vandewalle, Pierre

2006 • In Belgian Journal of Zoology, 136 (1), p. 3-13

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Keywords :

catfish; cephalic region; Cetopsidae; Cetopsis; comparative morphology; pectoral girdle; phylogeny; Siluriformes

Abstract :

[en] The cephalic and pectoral girdle structures of the cetopsid Celopsis coecutiens (Cetopsinae) are described and compared with those of another species of the subfamily Cetopsinae, Hemicetopsis candiru, and of one species of the single genus of the subfamily Helogeninae, Helogenes marmoratus, as well as of several other catfishes. Our observations and comparisons support Me's 1991 and de Pinna's 1998 phylogenetic hypothesis, according to which the cetopsids occupy a rather basal position within the Siluriformes. In addition, our observations and comparisons pointed out three new, additional characters to diagnose the family Cetopsidae, namely : 1) presence of a muscle 6 of the mandibular barbels; 2) medial branchiostegal rays long and Stout; 3) mandibular barbels originate on the posteroventral Surface of their irregularly shaped basal cartilages.

Disciplines :

Zoology

Author, co-author :

Diogo, Rui; Université de Liège - ULiège

Chardon, Michel ; Université de Liège - ULiège > Services généraux (Faculté des sciences) > Relations académiques et scientifiques (Sciences)

Vandewalle, Pierre ; Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Morphologie fonctionnelle et évolutive

Language :

English

Title :

Publication date :

January 2006

Journal title :

Belgian Journal of Zoology

ISSN :

0777-6276

eISSN :

2295-0451

Publisher :

Societe Royale Zoologique De Belgique, Diepenbeek, Belgium

Volume :

136

Issue :

Pages :

3-13

Available on ORBi :

since 30 March 2020

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