Doiichthys Weber, 1913

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 : 467-468

Doiichthys Weber, 1913

( Figs 1–3 , 44 )

Type species: Doiichthys novaeguineae Weber, 1913 .

Diagnosis

Lateral horn of lateral ethmoid long and posteriorly oriented (12, 1> 2); nasal not well defined ( 19, 0> 1); ventral crest of parieto-supraoccipital process weakly developed, restricted to base of process (48, 1> 0); three infraorbitals ( 95, 3> 1); articulation of autopalatine with lateral ethmoid slightly anterior to middle of bone (111, 2> 0); metapterygoid twice as deep as long in perpendicular section (135, 1> 0); first external branchiostegal ray proximally narrow and distally broad (147, 1> 0); posterior ceratohyal very long ( 153, 0> 2); urohyal very long ( 157, 1> 2); posterior end of urohyal bifurcate (158, 0> 1); urohyal posterolateral processes one-third as long as distal portion of bone (162, 2> 4); first and second epibranchials straight for entire length ( 178, 0> 1); mesial portion of first epibranchial very large and depressed ( 180, 0> 2); first pharyngobranchial on mesialendoffirstepibranchial (191, 1> 0); thirdpharyngobranchial funnel shaped (192, 1> 0); upper (pharyngeal) tooth plate long and narrow, its length three times its width (195,?> 2); transverse crest associated with neural spine of fourth vertebra low (200, 1> 0); median crest associated with neural spine of third vertebra low or absent (201, 1> 0).

Ambiguous optimization: Accessory tooth plates present (58, 0> 1).

Included species

Doiichthys novaeguineae Weber, 1913 .

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

Remarks

The total-evidence analysis supports a sister group relationship of Doiichthys plus Nedystoma , which was uncovered previously in independent molecular and morphological studies ( Kailola 2004, Marceniuk and Menezes 2007, Betancur-R. 2009, Marceniuk et al. 2012). The synonymy of Doiichthys with Nedystoma proposed by Kailola (2004) is rejected and Doiichthys is recognized as a valid genus following Marceniuk and Menezes (2007) and 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 44. Doiichthys novaeguineae, New Guinea, photograph by Ricardo Betancur-R., type species of the genus.