Observation on sp. nov. (Apicomplexa: Eugregarinida) from an Indian earthworm (Annelida: Oligochaeta).

A survey to know the diversity of endoparasitic protozoan parasites of the earthworms of West Bengal, revealed a new species of the genus Stein, 1848, that resides in the seminal vesicle of the earthworm Perrier. sp. nov.

Observation on Nematocystis kailashi sp. nov. (Apicomplexa: Eugregarinida) from an Indian earthworm Glyphidrilus tuberosus Stephenson (Annelida: Oligochaeta).

Surveys on aseptate gregarines in earthworm hosts in different districts of West Bengal state of India revealed the existence of one new species of aseptate gregarine of the genus Nematocystis Hesse, 1909 have been identified from the seminal vesicles of the earthworm, Glyphidrilus tuberosus Stephenson, 1916 in the district of Purba Midnapur, West Bengal of India. Gamonts of the organism are very much elongated, cylindrical, nematoid and without mucron. The terminal end adjacent to the nucleus rounded and the distal end pointed.

Nematocystis vinodae n. sp. (Protozoa, Apicomplexa, Eugregarinida), a monocystid gregarine from Eutyphoeus nicholsoni (Beddard).

Objective: Biodiversity studies in search of endoparasitic acephaline gregarines revealed a new species under the genus Nematocystis Hesse, 1909.

Methods: The species has been obtained from the seminal vesicles of the earthworm, Eutyphoeus nicholsoni (Beddard).

Results And Conclusion: Gamonts of this species are solitary and bear a perfect nematoid appearance with smoothly curved terminals, especially in mature forms.

Monocystis metaphirae sp. nov. (Protista: Apicomplexa: Monocystidae) from the earthworm Metaphire houlleti (Perrier).

Biodiversity studies in search of endoparasitic acephaline gregarines revealed a new species of the genus Monocystis Stein, 1848 in the seminal vesicles of the earthworm Metaphire houlleti (Perrier) residing in alluvial soil of the district of North 24 Parganas. The new species is characterized by having bean-shaped gamonts measuring 94.0-151.

Monocystis apporectodae sp. nov. (Protozoa: Apicomplexa: Eugregarinida), from an Indian earthworm Apporectodea trapezoides Duges.

A survey aimed at exploring the endoparasitic acephaline gregarine diversity in South-western Bengal, detected a new species of the genus Monocystis Stein, 1848, that resides in the seminal vesicles of the earthworm, Apporectodea trapezoides Duges collected in the district of Bankura from alluvial soil. Monocystis apporectodae sp. nov.