A Review of the Genus Pseudoproleptus (Nematoda: Physalopteridae) with Description of New Species Pseudoproleptusbhartii sp. nov.from Fresh Water Fish Notopterusnotopterus (Pallas)

Nematodes are the most specifically diversified group next to insect. To get acknowledge of role of
nematodes in biodiversity a sound knowledge and understanding of its taxonomy together with details of its
biology is essential. Because of difficulties in studying fish nematodes, associated with their morphological
and biological peculiarities, most species of these parasites are poorly known The present study is one step
ahead to disclose the existence of new species of Pseudoproleptus collected from fresh water fish
Notopterusnotopterus (Pallas) from U.P. (India) characterised due to the presence of cephalic cuticular
helmet like structure, described as a cuticular fold or collar is distinguish itself from its conspecies on the
basis of position of caudal papillae (4 pairs preanal, one pair adanal and 4 pairs postanal), absence of
transverse cuticularisation in left spicule and spicule length ratio 1:4.2.