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Tosacyprina
Taxonomy
Tosacyprina was named by Tashiro and Kozai (1989).
It was assigned to Arcticidae by Tashiro and Kozai (1989).
It was assigned to Arcticidae by Tashiro and Kozai (1989).
Synonymy list
| Year | Name and author |
|---|---|
| 1989 | Tosacyprina Tashiro and Kozai p. 121 |
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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. †Tosacyprina Tashiro and Kozai 1989
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| Tashiro and Kozai 1989 | Shell small, roundly ovate; umbo small, prosogyrate, pointed at anterior to mid-point of valve; hinge structure same with that of Isocyprina except for well developed cardinal 4b; external surface with very fine regularly spaced concentric striae; lunule and escutcheon indistinct; inner posterior slope or inner areal part with very fine numerous radial threads; inner margin very finely crenulated; pallial line rather shallow, simple with less developed pallial sinus. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| Reference: Aberhan et al. 2004 | |||||
Collections
No collection or age range data are available