A new genus and two new species of nematodes(Nematoda:Thelastomatoidea)from Ceracupes fronticornis(Westwood)(Insecta:Passalidae)in China

A new genus and two new species of thelastomatoid nematodes are reported here,which were collected from Ceracupes fronticornis(Westwood,1842)from Yunnan Province,China.Hystrignathus baihualingensis sp.nov.differs from its closely related species by having a very short stoma,the length of tail and egg size,and the arrangement of the cervical spines.Paralepidonema baoshanensis gen.&sp.nov.differs from its similar genera by having a disk-like first cephalic annule,sub-cylindrical procorpus,20 elements in the first row of spines,and a didelphic-amphidelphic reproductive system.