Biosystematic Studies on Nematoda Spinitectusgaruai sp.nov. from clupisoma garuai (Hamilton)

Abstract

The genetic diversity among the fascinating biota is the result of several thousand years of tough competition within an individual among species, with other organism and several biotic and abiotic environmental factors during the process of evolution. One of the new species has been added in this series described and figured from the small intestine of Clupisoma garuai (Hamilton). After going through the literature the present form comes closer to known valid sp. of the genus Spinitectus in having all the essential morphological characters as body medium, having annulations, annula bearing spines, oesophagus divided into parts muscular anterior and glandular posterior one, thin cuticle. Males are smaller than females, spicules unequal, tail curved in male, two ovaries situated at one anterior and other posterior one, tail pointed in females but differs due to three longitudinal cuticular ridges present at the posterior part of the body and well developed lateral alae in both the sexes, no. of caudal papillae 10 pairs, 6 pairs preanal,1 pair adanal and 3 pairs post-anal,spicule ratio 1:2.16 instead of 1:2.7.