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Free keywords:
Cyanophyta, Cyanonephron styloides, new genus, new species, plankton, brackish lake
Abstract:
Cyanonephron styloides sp. nov. is described and allocated to a new
genus of planktic cyanophytes (Order: Chroococcales). It is characterized 1)
by the possession of elongate, slightly curved cells which form a hollow sphere,
one cell in thickness, interconnected by radiating gelatinous strands, and 2) by
the mode of cell division in one plane perpendicular to the surface of the
colony. The free floating colonies are small, more or less globose or ellipsoidal.
Cyanonephron is allied with:. Gomphosphaeria by colony form with radiating
strands of gelatinous material linking the bases of the cells to the centre of the
colony. However, its mode of reproduction, fundamental criterion for chroococcal cyanophyte systematics at the generic level, reveals its relationship with
Synechococcus. Cyanonephron styloides is common in a shallow, hypertrophic
brackish lake (North Germany) in early summer.
