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Distephanosira
Taxonomy
Distephanosira was named by Glezer et al. (1992). It is not extant.
It was assigned to Paraliaceae by Glezer et al. (1992).
It was assigned to Paraliaceae by Glezer et al. (1992).
Synonymy list
| Year | Name and author |
|---|---|
| 1992 | Distephanosira Glezer et al. p. 128 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. †Distephanosira Glezer et al. 1992
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| Z. I. Glezer et al. 1992 | Colonies straight tight cells are connected by linking spines of various morphologies, usually forming two rings. The terminal valve does not have marginal spines. The frustule is a shallow cylinder, the valves are connected by their ring diaphragm. The valves are round and flat with a weakly convex face, in the centre there are small bumps surrounding small depressions. Relatively sparse areolae. The marginal part is wide, occupying roughly half the valve area, with radial rows of areolae. On the mantle the areolae are in short, straight, vertical and horizontal rows. On their internal surface the valve face has no structure, small rimoportulae form a ring in a margin near the ring diaphragm. |
Measurements
No measurements are available
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| Source: c = class | |||||
| Reference: Kiessling 2004 | |||||