The pictures are taken at a lower magnification and dont show detailed needed to ID it to the genus level but looking at the overall structural detail at the level I can and it looks to me a Rhabditid. But a more enlarged and preferably video clips should be provided so that mouth parts, reproductive structures and if males are available supplement and copulatory structures are studied.
There are very important facts about nematode ID. 1. Where was it obtained or extracted from is the type of specimen eg soil,.animal specimen (mention), plant tissue,water etc 3. The anterior and posterior must very clear 4. You must capture oesophagus to distinguish whether it is a Tylenchidae or Dorylaimida based on these few it will be easy eliminate analogies and close homologies.Thank you. If you place these details on paper then ID would be Easy
Dear Colleagues, many thanks for your comments. This species was recognized as Panagrolaimus rigidus, however, The Reviewer suggest misidentyfication due to posterior vulva position. So we are a little bit confused. I will add more detailed photos as soon as possible.
Despite the slight increase of photographs, specimens belonging to seem to see some kind of entomopathogenic nematodes (Steinernema Heterorhabditis or, for example)