Epsilonema, STEINER, 1927

Leduc, Daniel & Zhao, Zeng, 2016, Phylogenetic relationships within the superfamily Desmodoroidea (Nematoda: Desmodorida), with descriptions of two new and one known species, Zoological Journal of the Linnean Society (Zool. J. Linn. Soc.) 176 (3), pp. 511-536 : 523-524

EPSILONEMA STEINER, 1927

Diagnosis (from Gourbault & Decraemer, 1996)

Body epsilon-shaped with widest regions at level of pharynx and reproductive system. Ambulatory setae slender, straight or bent, arranged in four to five longitudinal rows in anterior half of posterior body region; pre- and postvulvar in females but only one or two pairs of setae being posterior to vulva (none in Epsilonema meunierorum Decraemer & Gourbault, 1987 , and Epsilonema oodamphis Decraemer & Gourbault, 1987 ).

524 D. LEDUC AND Z. ZHAO

Supporting setae present. Rostrum with eight subcephalic setae (six in Epsilonema espeeli and Epsilonema lasium and 16 setae at base of head in Epsilonema enigmaticum ). Amphideal fovea spiral, cryptospiral, or almost circular, with possible sexual dimorphism in size.

Type species

Epsilonema cygnoides (Metschnikoff, 1867)

Remarks

See Gourbault & Decraemer (1996) for a revision of the genus. Epsilonema anulosum (Verschelde & Vincx, 1992) was synonymized with Epsilonema pustulatum (Gerlach, 1952) by Karssen, Van Aelst & De Deyn (2000).

Valid species

Epsilonema byssicola Lorenzen, 1973

Epsilonema costeriatum (Murphy, 1963)

Epsilonema cryptamphis Decraemer & Gourbault, 1987 Epsilonema cygnoides (Metschnikoff, 1867) Epsilonema cyrtum Steiner, 1931

Epsilonema dentatum Lorenzen, 1973

Epsilonema docidocricum (Steiner, 1931)

Epsilonema enigmaticum Gourbault & Decraemer, 1994 Epsilonema espeeli Verschelde & Vincx, 1994 Epsilonema exoticum Gourbault & Decraemer 1994 Epsilonema fernandinense Clasing, 1984

Epsilonema lasium Lorenzen, 1973

Epsilonema longispiculum Decraemer, 1982 Epsilonema magnospinosum Clasing, 1981 Epsilonema mangrovense Clasing, 1984

Epsilonema margaritatum Decraemer & Gourbault, 1987 Epsilonema meunierorum Decraemer & Gourbault, 1987 Epsilonema multispiratum Raes et al., 2003 Epsilonema oodamphis Decraemer & Gourbault, 1987 Epsilonema paralasium Decraemer & Gourbault, 1987 Epsilonema parvospina Decraemer, 1982

Epsilonema pustulatum (Gerlach, 1952)

Epsilonema serrulatum Lorenzen, 1973

Epsilonema spinulosum (Lorenzen, 1993)