Dentodiaptomus Shen & Tai, 1964

Sanoamuang, Laorsri & Watiroyram, Santi, 2021, A new species of copepod (Copepoda: Calanoida) from the floodplain of the lower Mekong River Basin in Thailand and Cambodia, with an amended diagnosis of the genus Dentodiaptomus Shen & Tai, 1964, Raffles Bulletin of Zoology 69, pp. 414-427 : 416

Dentodiaptomus Shen & Tai, 1964

Type species. Dentodiaptomus javanus ( Grochmalicki, 1915) .

Other included species. Dentodiaptomus orientalis , new species.

Amended diagnosis. Moderate body size, longer than 1 mm excluding caudal setae. Cephalothorax with fused suture dorsally indicating incomplete incorporation. Antennule reaches distal end of caudal setae or shorter.

Male: Right antennule 22-segmented. Pedigers 4 and 5 separated, asymmetrical. Genital somite asymmetrical, with a tiny spine on distal outer corner of right side; urosomites 2–5 and caudal rami without ornamentation. P5 intercoxal sclerite unproduced at distal margin. Right P5: coxa produced at distal outer corner into a large lobe, coxal spine reduced; Exp-2 with a principal spine on distal outer margin, and a longitudinal ridge on posterior surface terminated nearby insertion of principal spine; Enp one-segmented, elongated. Left P5: Exp-2 with inner roundish prominence, apex with one seta; and 1–10 denticles on distal inner margin.

Female: Antennule 25-segmented. Pedigers 4 and 5 fused, with suture laterally; lateral wings asymmetrical, with dorsal and posterior spines. Genital double-somite more asymmetrical than symmetrical. P5 slightly asymmetrical, Exp-3 with two spines on small segment, Enp with row of spinules on distal end.