Corononema


Corononema is a genus of coastal xyalid nematodes. The three known species are distributed in Australia, Thailand, and Vietnam.

Description

There are eight prominently annulated longitudinal ridges on the cuticle. The lips are high and deeply incised. Around the head, there is a deep groove posterior to the six inner labial setae and anterior to the outer labial and cephalic setae, which sets the labial parts apart from the slightly tapered pharyngostoma. The pharyngostoma is spacious and cylinder-shaped with strongly cuticularized walls. Amphidial fovea circle-shaped, located at the level of the pharyngostoma. The spicules are strongly curved ventrally, cephalated. The gubernaculum is small and without dorsal apophyses. Precloacal supplements absent.

Species

The following three species are included as of 2023: