Paramonohystera weihaiensis sp. nov.(Xyalidae, Nematoda) from the intertidal beach of the Yellow Sea, China

摘要

A new species of free-living marine nematode of the genus Paramonohystera was described from the intertidal beach, Weihai. Paramonohystera weihaiensis sp. nov. is characterized by cervical region with a circle of long setae;tail sexual dimorphism, male tail angled dorsally with sharp narrowed of the body at the cloaca, female tail ordinary conico-cylindrical;spicules slender, 2.5 abd long;gubernaculum plate, enlarged distal end with two teeth, without apophysis;precloacal supplements absent;Four caudal gland cells obviously extended to tail. The new species differs from the other fourteen known valid congeners by the combination of its characteristics:a circle of long cervical setae, tail sexual dimorphism, spicules slender, 2.5 abd long, gubernaculum plate with a distal pair of teeth.