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Quarterly Journal of Microscopical Science, Vol s2-81, 1-24, Copyright © 1938 by Company of Biologists

Memoirs: Polymastigote flagellates of the genus Foaina Janicki, and two new genera Crucinympha and Bullanympha

HAROLD KIRBY Jun. 1

1 University of California

1. Foaina gracilis does not have two parabasal bodies, as described by Janicki, but a single structure that partially encircles the nucleus and extends on both sides of the blepharoplast. It is the type species of a large genus of Devescovininae.

2. A similar flagellate, Foaina delicata new species, occurs in Glyptotermes iridipennis. It was included by Duboseq and Grassé in the supposed life-cycle of ‘Devescovina hilli’ as a young stage.

3. The larger forms typical of ‘Devescovina hilli’ do not belong in the genus Devescovina. A new genus, Crucinympha, is established.

4. The parabasal apparatus is very different from that of species of Devescovina. There is a proximal element bent in a hook on the anterior surface of the nucleus, with the blepharoplast closest to the bend, passing along the unclear membrane in a C- or U-form; and one or two, rarely three, distal elements attached to this so that the apparatus has the shape of an inverted T or a cross.

5. The supposed longitudinal fission of the parabasal apparatus of ‘Devescovina hilli’, described by Daboscq and Grassé, is not actually division; its description was due to misinterpretation of the normal structure.

6. A remarkable flagellate, Bullanympha silvestrii new genus, new species, is present in Neotermes erythraeus.

7. The parabasal apparatus of Bullanympha silvestrii is very unusual. It consists of a U-shaped proximal element of normal size and form comparable to the parabasal bodies of certain species of Foaina, and a voluminous, compressed, distal element attached to this at the bend and turned around the axostyle 1/2 to 3 1/2 times, having a form suggestive of a spiral, sloping shelf.

8. In the surface layer of cytoplasm of the whole body of all specimens are numerous, short, rod-shaped, deeply staining peripheral granules. Some show forms suggesting fission, and they are probably intracytoplasmic micro-organisms.






© The Company of Biologists Ltd 1938