Osteogeneiosus

Alexandre P. Marceniuk & Naércio A. Menezes, 2007, Systematics of the family Ariidae (Ostariophysi, Siluriformes), with a redefinition of the genera., Zootaxa 1416, pp. 1-126 : 85-87

publication ID

z01416p001

publication LSID

lsid:zoobank.org:pub:FFC65592-D8DB-41BE-AEAC-A41EAB6C6185

DOI

https://doi.org/10.5281/zenodo.6237026

persistent identifier

https://treatment.plazi.org/id/E6EBDF42-0EFD-7E6F-9173-D71C4F4EF82A

treatment provided by

Thomas

scientific name

Osteogeneiosus
status

 

Osteogeneiosus View in CoL View at ENA   ZBK Bleeker, 1846

(fig. 71)

Osteogeneiosus   ZBK Bleeker, 1846: 173. Type species: Arius militaris Valenciennes, 1840 (= Silurus militaris   ZBK Linnaeus, 1758). Type by subsequent designation by Bleeker (1862: 8; 1863: 93). Gender: Masculine.

Diagnosis. Osteogeneiosus   ZBK can be differentiated from all other members of the Ariidae by the combination of the following exclusive (1 to 9) and shared (10 to 15) characters: (1) nasal anterior portion notably curved; (2) bony blade anteriorly connecting nasal tubules absent; (3) lachrymal with three anterior and one lateral branches (fig. 72); (4) maxillary thin and very elongate (fig. 73); (5) maxillary condyles very large (fig. 73); (6) palatine cylindrical very thick and short (fig. 74); (7) posterior cartilage of palatine vestigial; (8) metapterygoid low and elongate, its greatest depth three times in its length (fig. 75); (9) mental barbels absent; (10) vomer posterior process very thin from its base [shared with Plicofollis   ZBK (with exception of P. tenuispinis and P. platystomus )]; (11) fenestra delimited by lateral ethmoid and frontal bones well developed (shared with Amphiarius , Cathorops , Cephalocassis   ZBK , Cryptarius   ZBK , Doiichthys   ZBK , Hemiarius   ZBK , Nedystoma   ZBK and Nemapteryx   ZBK ); (12) mesial laminar projection on frontal bones absent (shared with Amphiarius , Arius   ZBK , Aspistor   ZBK , Cathorops , Cephalocassis   ZBK , Cryptarius   ZBK , Doiichthys   ZBK , Galeichthys   ZBK , Hemiarius   ZBK , Nedystoma   ZBK , Nemapteryx   ZBK , Potamarius   ZBK and Potamosilurus latirostris ); (13) anterior cartilage of palatine short, less than 1/3 on bone length (fig. 74) (shared with Bagre and Galeichthys   ZBK ); (14) urohyal medial process short (shared with Galeichthys   ZBK ); (15) space limited by posterior epioccipital process and crests associated with fourth vertebra very reduced, restricted to anterior portion [shared with Arius   ZBK , Carlarius , Brustiarius   ZBK , Cochlefelis   ZBK , Genidens   ZBK , Neoarius   ZBK , Netuma , Plicofollis   ZBK (with exception of P. platystomus and P. tenuispinis ), Potamarius grandoculis , Potamosilurus and Sciades (with exception of S. platypogon )].

Supplementary morphological characters. Cephalic shield granulated visible under the skin; a large fenestra limited by lateral ethmoid and frontal visible under the skin; medial groove of neurocranium very distinct, limited by frontal bones and/or on supraoccipital; posterior cranial fontanel moderately developed, long and narrow; fenestra limited by supraoccipital, pterotic and sphenotic absent; fossa limited by pterotic, supracleithrum and extrascapular relatively large; epioccipital not invading dorsal portion of cephalic shield; occipital process triangular, moderately long and narrow, progressively narrower toward its posterior part; anterior and median nuchal plates fused and indistinct, forming a structure of semi-lunar aspect; tooth plates associated with vomer absent; accessory tooth plates longitudinally elongate, bearing molar-like teeth; maxillary barbel cylindrical and bony along its entire extension; base of adipose fin moderately long, about half as long as anal-fin base; lateral line bifurcated at caudal region, reaching base of caudal-fin upper and lower lobes; cleithrum wide, with second dorsal process on its upper portion; posterior cleithral process moderately long and distinct from second dorsal process of cleithrum.

Distribution and habitat. South and southeast Asia, marine and brackish waters.

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