Syringolaimus filicaudatus Vitiello, 1970

Tchesunov, Alexei V., 2017, Free-living nematodes of the genus Syringolaimus de Man, 1888 (Nematoda, Enoplida, Ironidae) from the Angola Basin, South-East Atlantic Abyss, Zootaxa 4306 (4), pp. 478-500 : 481

Syringolaimus filicaudatus Vitiello, 1970

Vitiello, 1970: p. 206–207, figs 51 a–j (Mediterranean, Gulf of Lion, 310–580 m). Body cuticle finely striated only in anterior and caudal regions. Ventral pore at 37% of pharynx length from anterior length. Caudal glands and spinneret present. Male gonads not described. No preanal supplementary papilla. Gubernaculum vestigial. Among other things, the species is distinguished from other species by fine striations of anterior cuticle and distinctly narrow arcuate spicules.

Syringolaimus gladiatus Bussau, 1993 nom. nud.

Bussau, 1993: p. 492–497, Abb. 211, 212, 213 ( South-East Pacific , Peru Basin, 4100–4200 m, dark brown ooze with manganese nodules), males and females. Body cuticle with fine annulations. Metanemes present. Ventral pore situated between buccal cavity base and nerve ring, in male at a distance 87 µm posterior to the anterior end; ventral gland cell body not found. Caudal glands and spinneret absent. Monorchic. No supplementary organs mentioned.

Syringolaimus ingens Bussau, 1993 nom. nud.

Bussau, 1993: p. 498–501, Abb. 214, 215 ( South–East Pacific , Peru Basin, 4100–4200 m, dark brown ooze with manganese nodules), male and females. The largest (by body length) species of the genus. Body cuticle with extremely fine annulations. Metanemes present. Neither ventral pore nor ventral gland cell body found. Spinneret evident but no caudal glands found. Monorchic. No supplementary organs mentioned.

Syringolaimus lichenii ( Nasira & Turpeenniemi, 2002) Tahseen & Mehdi, 2009 sp. inq.

Nasira & Turpeenniemi, 2002: p. 2–4, fig. 1 A–I, table 1 ( Trissonchulus lichenii ) (Pakistan, Karachi, beach, lichens), males and females. Unusual elongate cardia. Diorchic. Original diagnosis is very brief, anterior sensilla (besides amphid), supplementary papillae, caudal gland and spinneret are not mentioned. Tahseen & Mehdi (2009) noted that the species is inadequately described and better fits within the genus Syringolaimus on account of nonoffset lip region, presence of pharyngeal bulb and conical tail with caudal glands and terminal spinneret. However, presence of two testes does not correspond to the genus Syringolaimus .