Potamosilurus Marceniuk & Menezes, 2007

Marceniuk, Alexandre Pires, Oliveira, Claudio & Ferraris Jr, Carl J., 2024, A new classification of the family Ariidae (Osteichthyes: Ostariophysi: Siluriformes) based on combined analyses of morphological and molecular data, Zoological Journal of the Linnean Society 200 (2), pp. 426-476 : 473

Potamosilurus Marceniuk & Menezes, 2007

MP 99, BI 1, ML 99

( Figs 1–3 , 38H and 53 )

Type species: Hemipimelodus macrorhynchus Weber, 1913 .

Diagnosis

Lateral ethmoid as main component of bony bridge formed by lateral ethmoid and frontal (15, 1> 0); accessory tooth plates absent (58, 1> 0); contact face for articulation of transcapular process with basioccipital large and depressed (85, 0> 1).

Ambiguous optimization: Mesethmoid medial notch indistinct, obscured by bone deposition (1, 1> 2); mesethmoid median portion moderately wide (2, 2> 1); dorsal crest of hyomandibula short and high (141, 0> 1); adipose-fin base moderately long (222, 1> 2).

Included species

Potamosilurus coatesi Kailola, 1990

Potamosilurus macrorhynchus Weber, 1913

Potamosilurus robertsi Kailola, 1990 * sedis mutabilis Potamosilurus velutinus Weber, 1907 .

Habitat and distribution: Freshwater, southern New Guinea ( Fig. 38 ).

Remarks

Potamosilurus is recognized as a valid genus, as defined by Marceniuk and Menezes (2007) excluding Papuarius latirostris , which is assigned to a new genus based on the results of the total-evidence analysis.

Figures

Figure 1. MP analysis.Subfamilies (SF) Galeichthyinae (pink), Bagreinae (bright blue), and Ariinae (dark blue). Tribe (T) Ariini (blue), Cathopsini (orange), Genidentini tribe nov. (brown), and Sciadeini tribe nov. (light green).Subtribe (ST) Ariina (light blue) and Doiichthyina (green). Incertae sedis taxa (IS) (red). Numbers over branches correspond to the bootstrap support.

Figure 2. ML analysis. Subfamilies (SF) Galeichthyinae (pink), Bagreinae (bright blue), and Ariinae (dark blue). Tribe (T) Ariini (blue), Cathopsini (orange), Genidentini tribe nov. (brown), and Sciadeini tribe nov. (light green). Subtribe (ST) Ariina (light blue) and Doiichthyina (green). Incertae sedis taxa (IS) (red). Numbers over branches correspond to the bootstrap support.

Figure 3. BI analysis.Subfamilies (SF) Galeichthyinae (pink), Bagreinae (bright blue), and Ariinae (dark blue). Tribe (T) Ariini (blue), Cathopsini (orange), Genidentini tribe nov. (brown), and Sciadeini tribe nov. (light green).Subtribe (ST) Ariina (light blue) and Doiichthyina (green). Incertae sedis taxa (IS) (red). Numbers over branches correspond to the bootstrap support.

Figure 38. Representative skulls, in dorsal view, and distribution of the subtribe Doiichthyina.A, Brustiarius nox, AUM 47488. B, Paracinetodus carinatus, AUM 47550.C, Cochlefelis spatula, AUM 50296. D, Nedystoma dayi, AUM 47500. E, Aceroichthys dioctes, AUM 47507. F, Pachyula crassilabris, AUM 47509. G, Pararius proximus, AUM 47486.H, Potamosilurus velutinus, AUM 47489.* marine, ** brackish waters, *** freshwater.

Figure 53. Potamosilurus macrorhynchus, ZMA 111086, New Guinea, type species of the genus.