Zalonema sesokoensis n. sp. (Nematoda: Desmodoridae), a new nematode species from subtidal sediments of Sesoko Island, Japan

抄録

Zalonema sesoskoensis n. sp. is described from shallow subtidal sediments of Sesoko Island. The new species is characterised by annulated cuticle with minute spines, male with ventral and lateral alae, circle of eight subcephalic setae between cephalic setae and anterior edge of amphideal fovea, amphideal fovea with 3.5 turns in male and 2.5 turns in females, buccal cavity with dorsal tooth and minute ventral tooth located further posteriorly in females than in male, spicules 1.1-1.7 cloacal body diameters long, and male with seven precloacal supplements, posteriormost supplement cup-shaped, cuticularized and conspicuous, other supplements small, pore-like. Zalonema sesokoensis n. sp. is the first Zalonema species to be described from Japanese waters. There are now 11 species in the genus worldwide.