North-East India Helminth Parasite Information Database

Oswaldocruzia goezei (Skrajabin et Schulz Skrajabin et Schulz) Back


Nematoda »
              Molineidae (Skrjabin et Schulz, 1937) Durette-Desset et Chabaud, 1977 »
                     Molineinae Skrjabin et Schulz, 1937 »
                            Oswaldocruzia Travassos, 1917 »
                                    Oswaldocruzia goezei, Skrajabin et Schulz 1952


(Ascaris filliformis Goeze, 1782 ; Oswalocruzia filiformis (Goeze, 1782) Travassos, 1917; O. indica Lal, 1944; O. melanosticti Gupta, 1960)


Bufo (melanostictus), Euphlyctis (cyanophlyctis), Ichthyophis (glutinosa)




Shillong (Meghalaya), Sumer (Meghalaya), Byrnihat (Meghalaya), Khliehriat (Meghalaya), Anogiri (Meghalaya), Kohima (Nagaland), Dimapur (Nagaland)


Body very slender, white or whitish grey in colour, tapering at both ends. Cuticle of head end inflated, with transverse striations, longitudinal ridges, i.e., synlophe, present. Mouth small, with indistinct lips. Buccal cavity small, with chitinous lips. Oesophagus club shaped.


Body 4.66-5.63 mm in length, 0.108-0.132 mm in maximum width. Spicules two, long, bluntly pointed, equal; divided distally into 4 or 5 branches; gubernaculum absent. Bursa well developed with large lobes; ventral rays of bursa close together, equal in size; lateral rays equal, antero-lateral rays divergent from other two which are closely apposed; externo-dorsal rays rising from base of dorsal ray, proximally parallel to trunks of lateral rays but distally diverging from postero-lateral rays; dorsal ray long, stout, cleft distally into two pairs of small accessory branches, again into several short, terminal digitations.


Body 9.183-12.364 mm in length, 0.116-0.196 mm in maximum width. Ovaries two, amphidelphic condition of uterus. Vulva post-equatorial in posterior half of body. Eggs numerous, small, oval, a few containing embryos, 0.072-0.095 x 0.044-0.054 mm. Tail tapering to bluntly rounded point with terminal, spike-like filament.


Skrjabin and Schulz (1952) gave a new name O. goezei to the species described by Travassos, (1917) from B. bufo and other amphibians by the name of Oswaldocruzia filiformis (Goeze, 1782) Travassos,1917. (According to Skrajabin et al, (1954), who revised the genus Oswaldocruzia, the original description of Ascaris filiformis, owed to Goeze (1782), has insufficient content and lacks species diagnostic indications. Therefore, in their opinion O. filiformis (Goeze, 1782) is a species inquirenda. However, in literature this species has been re-described or recorded under the same name i.e., O. filiformis by many authors (ref.  1954).From India, Baylis and Daubney (1923) reported it from B. melanostictus from Nicobar Islands. Lal (1944) described a new species, O. indica from B. melanostictus and R. cyanophlyctis from Uttar Pradesh, which was not considered to be valid by Skrjabin et al,  (1954). Gupta (1960) described yet another species, O. melanosticti from erstwhile East Pakistan (now Bangladesh). Both these species are considered con-specific with O. filiformis.

Helminthological collections record

NEHU/Z - TA/12

Specimen Type

Holotype: W7768/1 (male); W7769/1 (female) in Zoological survey of India, Kolkata.


Skrjabin, K. I., Shikhobalova, N. P., Schul'ts, R. S., Popova, T. I., Boev, S. N. and Delyamure, S. L. (1952) Descriptive catalogue of parasitic nematodes. Vol. 3. Strongylata (in Russian), Izdatelstvo Akademii Nauk SSSR, Moscow.

Travassos, L. P. (1917). Trichostrongylidae brazileiras. Oswaldocruzia n. gen. Memorias do Instituto Oswalds Cruz.31:pp 73.

Skrjabin, K. I. Shikhobalova, N. P. and Schul'ts, R. S. (1954). Essentials of Nematology. Vol. III, Trichostrongylids of Animals .

Goeze, J. A. E. (1782). Versuch einer Naturgeschichte der Eigeweidewurmer thierischer Korper. xi 471 pp. Blankingburg.

Baylis, H. A. and Daubney, R. (1923). A further report on parasitic nematodes in the collection of the Zoological Survey of India. Records of Indian Museum. 25: pp 551-578.

Lal, M. B. (1944). A new amphibian trichostrongylid. Current Science, 13 (4): pp 104-105.

Gupta, S. P. (1960). Nematode parasites of vertebrates of East Pakistan. VI. Amplicaecum cacopi, Thelandros sp., Rhabdias ranae  and Oswaldocruzia melanosticti sp. nov. from frogs. Canadian Journal of Zoology.38:pp 748 - 750 .