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Codosiga botrytis.
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Portrait of choanoflagellate, Codosiga botrytis. Cells are clustered on simple, terminally branching stalk. Circumferential collar of microvilli can be seen. Single long flagellum directs food particles to the outside surface of the microvilli along which they move to be ingested at the apex of the cell. Adhering food particles are seen in these images. From a freshwater pond near Boise, Idaho. Phase contrast.
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Portrait of choanoflagellate, Codosiga botrytis. Cells are clustered on simple, terminally branching stalk. Circumferential collar of microvilli can be seen. Single long flagellum directs food particles to the outside surface of the microvilli along which they move to be ingested at the apex of the cell. Adherent food particles are seen in these images. From a freshwater pond near Boise, Idaho. Oblique illumination.
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Codosiga gracilis (Kent, 1880) De Saedeleer, 1927. Cell elongate-ovate, broadest anteriorly, narrowing posteriorly, about two and a half as long as broad, seated on a pedicel of from three to four times the cell length, distal end of the pedicel retaining its original plastic state for a length nearly equalling that of the cell. Length 6.4 microns
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Codosiga pyriformis Kent, 1880. Cells subpyriform, attached in small clusters by distinct rigid stalks, which equal their own bodies in length, individual stalks in turn attach to the apex of a long, simple, and slightly sinuous primary pedicel. Length of cells 6.4 microns
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Diaphanoeca fiordensis (Scagel and Stein, 1961) Norris, 1965. Choanoflagellates with a hyaline ribbed lorica, said by some to have a faintly pigmented pale green portion ovoid, 5 microns wide by 8 microns long, single flagellum 15-17 microns long. Enclosed in transparent, slightly flattened, basket-like lorica 16 microns wide by 24 microns long (including spines), lorica invaginated where flagellum emerges, tapering to a point opposite closed end. The lorica usually ornamented with three peripheral ridges transverse to longitudinal axis, and 10 emergent longitudinal ridges that merge at closed end but extend freely a distance of 10 microns to form a fringe of spines beyond open end.
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Acanthocorbis nana Thomsen et al, 1997. Cells solitary, attached to the substratum by means of single costal strips projecting from the posterior lorica end. Lorica funnel shaped, about 10 x 5 microns, and with anterior long spines (10-14) that continue downwards as longitudinal costae. Numerous, obliquely oriented transverse costal strips (>20) encircle the lorica at the level of or just below the joins between the anterior most longitudinal costal strips. The posterior part of the lorica encompasses numerous transverse costal strips that do not form distinct costae. Costal strips are rod-shaped, and 3-4 microns long. The cell body, about 4.5x3.5 microns, is posteriorly located within the lorica. The single flagellum is about 5 microns long, surrounded by a ring of tentacles (each about 2microns long), and with a conspicuous hairpoint. Division tectiform.
