Two new nematode species: Axonolaimus rushanensis sp. nov. (Axonolaimidae) and Trichromadora spheribulba sp. nov. (Chromadoridae) from the Yellow Sea, China

Abstract

Two new free-living nematode species, Axonolaimus rushanensis sp. nov. and Trichromadora spheribulba sp. nov. are described from Rushan, Yellow Sea, China. Axonolaimus rushanensis sp. nov. is characterized by two cervical setae, amphidial fovea loop-shaped with rounded outline at the level of buccal cavity, spicules short and arcuate, cuticularised and with straight capitulum, gubernaculum with dorso-caudal apophyses and tail conical.

Trichromadora spheribulba sp. nov. is characterized by long and slender body, buccal cavity with one large hollow dorsal tooth and two small subventral teeth, pharynx with an obvious posterior bulb, spicules long and arc-shaped, gubernaculum boat-shaped and swollen in the middle part, seven unequidistant cup-shaped supplements and tail conical. An identification key to valid species of the genus Trichromadora is also given.