Abstract
AbstractA new nematode species,Raphidascaris mundeswariensisn. sp. (Raphidascarididae), is described from male and female specimens found in the intestines of the mudskipperApocryptes bato(Hamilton, 1822) (Gobiidae) from the Mundeswari River of West Bengal, India. This species is distinguished from its congeners by 214–255-μm-long spicules, 14 pairs of preanal papillae of two markedly different sizes, one pair of adanal papillae, six pairs of postanal papillae and the absence of lateral alae. Phylogenetic analyses using partial sequences of the 28S ribosomal RNA gene place the new species in a clade containingRaphidascaris gigi,Raphidascaris lophii,Raphidascaris longispiculaand two species ofHysterothylacium. The molecular analyses also corroborate results of previous studies that have foundRaphidascarisandHysterothylaciumto be paraphyletic. The finding ofR.mundeswariensisinA.batois the firstRaphidascarisspecies described from a mudskipper anywhere.
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