North-East India Helminth Parasite Information Database

Oxysomatium macintoshii (Karve Karve) Stewart 1914 Back


Nematoda »
              Cosmocercidae (Railliet, 1916) Travassos, 1925 »
                     Cosmocercinae Railliet, 1916 »
                            Oxysomatium Railliet et Henry, 1916 »
                                    Oxysomatium macintoshii (Stewart 1914), Karve 1927


Euphlyctis (cyanophlyctis), Hyla (annectans), Philautus (annandallii), Polypedates (leucomystax), Rhacophorus (gongshanensis)




Kohima (Nagaland), Mokokchung (Nagaland), Zunheboto (Nagaland), Balphakram (Meghalaya)


Small or medium-sized worms; cuticular striations present. Head retractile. Mouth with three simple inconspicous lips. Oesophagus long containing buccal cavity with three tooth-like structures and clearly separated sub-globular bulb with definite valvular apparatus. Intestinal diverticulum absent. Lateral alae absent.


Body 1.84-2.26 mm in length, 0.07-0.108 mm in maximum width. Spicules two, sub-equal, relatively long; accessory piece indistinguishable. Tail abruptly tapering to sharp point behind anus; caudal alae absent. Fairly numerous sessile pre-anal and post-anal papillae present; post-anal papillae 18 pairs, 8 sub-dorsal, 10 sub-ventral; pre-anal papillae 9 pairs, 3 forming sub-ventral group surrounding cloaca with 2  anterior most pairs of post-anal papillae, 6 forming sub-lateral row on each side of body.

< p>Female

Body 2.232-3.09 mm in length, 0.10-0.19 mm in maximum width. Ovaries two, short, producing relatively few large eggs Vulva at about middle of body or somewhat behind it . Vagina running anteriorly for a short distance, branching into two uterine branches (amphidelphic condition). Eggs large, irregular, asymmetrical, 0.124-0.202 x 0.078-0.155 mm. Viviparous condition. Tail elongated, tapering to a point.


Originally described by Stewart,(1914) from Bufo stomaticus and Rana tigrina from Uttar Pradesh, this species has also been reported from B. melanostictus and the Indian painted frog, Kaloula pulchra taprobanica in West Bengal (Soota and Chaturvedi, 1971) and R. tigrina in Bihar (Soota and Dey Sarkar, 1981). Besides India, this species also occurs in Burma (Karve,1927) and Africa (Baylis, 1936a).

Helminthological collections record


Specimen Type

Holotype: W7766/1 (male); W7767/1 (female) in Zoological survey of India, Kolkata.


Stewart, F. H. (1914). Studies in Indian Helminthology. No. I. Records of Indian Museum.10:pp 165-193.

Soota, T. D. and Chaturvedi, Y. (1971). Notes on some nematodes from the unnamed collections of the Zoological Survey of India. Proceedings  of Zoological Society Calcutta. 24:pp 13-24.

Soota, T.D. and Dey Sarkar, S.R. 1981. On some nematodes parasitic in vertebrates hosts from Bihar, India. Records of Zoological Survey of India, 78: pp 121-127.

Karve, J. N. (1927). A redescription of the species Oxysomatium macintoshii (Stewart,1914) (Nematoda). Annals and Magazine of Natural History. 20 : pp 620 - 628.

Baylis, H.A. (1936a) The Fauna of British India including Ceylon and Burma. Nematoda Vol. I (Ascaroidea and Strongyloidea). Originally published by Taylor and Francis, London (reprinted edition : Today