North-East India Helminth Parasite Information Database

Icosiella sp. I Back


Nematoda »
              Onchocercidae (Leiper, 1911) Anderson et Bain, 1976 »
                     Icosiellinae Anderson, 1958 »
                            Icosiella Seurat, 1917 »
                                    Icosiella sp. I


Euphlyctis (cyanophlyctis), Polypedates (leucomystax), Rana (Sp.)




Dimapur (Nagaland)


Medium sized worm, stout, tapering at both ends, 11.99-13.17 mm in length, 0.31-0.33 mm in maximum width. Cuticular annulations or ridges well marked. Mouth small, with 3 lips, leaf-like extension on one lip. Mouth region separated by constriction, buccal cavity small. Oesophagus divided into 2 parts, short anterior muscular and long glandular posterior region; nerve ring in muscular region. Ovaries and uteri twisted or tangled. Vagina muscular directed backwards from vulva; vulva in anterior region of body at level of posterior region of glandular oesophagus. Ovejector absent. Eggs numerous, sub-elliptical, containing larva, 0.027-0.034 x 0.016-0.018 mm. Tail blunt.


On account of having an oesophagus with a distinct anterior muscular and a posterior glandular region and the opening of vulva located in the glandular region of the oesophagus, the present form is relegated to the genus Icosiella. Since only female specimens were recovered during the study, species status cannot be ascertained.Â

The genus Icosiella is being reported herein for the first time from the Indian subcontinent. P. leucomysytax, Rana sp.and E. cyanophlyctis are new host records for the genus. So far the members of this genus have been reported to occur in the connective, subcutaneous or inter - muscular tissues of frogs. The present form however, was recovered from the gastro-intestinal tract of the host.