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Not much known about the genus and there is only one species so far identified.  The first Rosculus ithacus was isolated from the rectum of a european grass snake (Natrix natrix), and subsequently it was claimed to have been discovered  in Cambridge, England in a river and a ditch (Page, 1974), and on maize and a human throat in North America (Page, 1988).

Rosculus at the Protist Information Server

The phylogenetic position of the group is uncertain.

Rosculus ithacus (13-19mm long) eruptive like Vahlkamfida but inclined to adopt flabellate morphology and locomotory habit.


Hawes, R.S.J. (1963). "On Rosculus ithacus gen. n. sp. n. (Protozoa, Amoebida), with special reference to its mitosis and phylogenetic relations." J.Morph. 113: 139-150.

Page, F.C. (1974). "Rosculus ithacus Hawes, 1963 (Amoebida, Flabelluidae) and the amphizoic tendency in amoebae." Acta. Protozool.13: 143-155.

Page, F.C. (1988). "A new guide to Freshwater and Soil Gymnamoebae". Institute of Terrestrial Ecology. CCAP.

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