Jayaramichthys, Marceniuk & Oliveira & Ferraris Jr, 2024

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 : 459-460

Jayaramichthys gen. nov.

( Figs 1–3 , 33 )

ZooBank registration: urn:lsid:zoobank.org:act:84D53B59-4ABB-4F76-B370-F9A510BB29F2 .

Type species: Arius leptonotacanthus Bleeker, 1849 .

Diagnosis

Bony bridge formed by lateral ethmoid and frontal equally represented (15, 0> 1); accessory tooth plates large, longitudinally elongate (60, 3> 4); face for articulation of transcapular process with basioccipital large and depressed (85, 0> 1); transcapular process at right angle to body axis (86, 0> 1); transcapular process depressed (88, 0> 1); bony blade connecting posterolateral processes of urohyal absent (159, 0> 1); median crest associated with neural spine of fourth vertebra very high (202, 0> 1). Ambiguous optimization: Space between transcapular process and otic capsule very small (89, 1> 2); contact area between interopercle and opercle no more than one-half of interopercle posterior face (131, 1> 0).

Etymology

Named for the Indian ichthyologist Kottore Chidambaram Jayaram (1926–2011) who contributed greatly to our understanding of the taxonomy, evolution, and biogeography of ariids from the Indian subcontinent. Gender: masculine.

Included species

Jayaramichthys leptonotacanthus Bleeker, 1849 .

Habitat and distribution: Brackish and marine waters, Southeast Asia ( Fig. 24 ).

Remarks

Jayaramichthys is established to accommodate Jayaramichthys leptonotacanthus , not examined in a previous morphological study (Marceniuk etal. 2012),buttreatedasvalid(as Ariusleptonotacanthus) in a previous molecular study in 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 24. Representative skulls, in dorsal view, and distribution of the subtribe Ariina.A, Arius maculatus, AUM 44875. B, Cephalocassis melanochir, CAS 49426. C, Cryptarius truncatus, AUM 50243. D, Hexanematichthys sagor, AUM 50242. E, Kyataphisa nenga, AUM 46280. F, Osteogeneiosus militaris, AUM 44880. G, Pseudosciades sona, AUM 44861. * marine, ** brackish water, *** freshwater.

Figure 33. Jayaramichthys leptonotacanthus, Indonesia and Thailand, photograph by Ricardo Betancur-R., type species of the genus.