Nemapteryx Ogilby, 1908

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 : 469-470

Nemapteryx Ogilby, 1908

MP 100, BI 1, ML 100

( Figs 1–3 , 47 )

Type species: Arius stirlingi Ogilby, 1898 .

Diagnosis (all of ambiguous optimization)

Posterior branches of mesethmoid narrow (6, 0> 1); posterior branches of mesethmoid parallel throughout (7, 0> 1); posterior branches of mesethmoid moderately long, delimiting between one-fourth and one-half of length of anterior cranial fontanel (8, 0> 1); fenestra delimited by lateral ethmoid and frontal very large (17, 1> 2); frontal mesial laminar projection absent (23, 1> 0); anterior portion of anterior cranial fontanel not delimited by dorsal expansion of orbitosphenoid (24, 1> 0); posterior cranial fontanel very wide and long (27, 1> 3); tooth plates associated with vomer present (55, 0> 1); lateral expansions of orbitosphenoid and pterosphenoid absent (64, 1> 0); optic foramen very reduced (67, 1> 2); ventral tip of subvertebral process spatulate (80, 2> 3); contact face for articulation of transcapular process with basioccipital large and depressed (85, 0> 1); transcapular process very short and thick (87, 2> 1); articulation of autopalatine with lateral ethmoid in middle of bone (111, 2> 1); premaxilla wide and moderately long, its length more than three times its width (120, 2> 1); dorsal crest of premaxilla beginning between lateral one-third or one-half of anterior margin (124, 0> 1); metapterygoid anterior process acute (138, 1> 0); dorsal crest of hyomandibula short and high (141, 0> 1); second basibranchial mushroom shaped (166, 0> 1); distal portion of uncinate process of third epibranchial truncate (183, 0> 1); Müllerian ramus bone blade inconspicuous (206, 2> 0); dorsal-fin spine prolonged into a filament (221, 0> 1); cleithrum lateral face very narrow (227, 0> 1).

Included species

Nemapteryx armiger De Vis, 1884 .

Nemapteryx aff. armiger .

Habitat and distribution: Brackish and marine waters, southern New Guinea and northern Australia ( Fig. 38 ).

Remarks

The total-evidence analysis supports the morphological and molecular distinctiveness of Nemapteryx ( Marceniuk and Menezes 2007, Marceniuk et al. 2012), with the addition of a currently unnamed species from New Guinea (Betancur-R. 2009).

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 47. Nemapteryx armiger (senior synonym of Arius stirlingi), northern Australia and central-southern New Guinea, photograph by Ricardo Betancur-R., type species of the genus.