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Xysila astaca
Taxonomy
Xysila astaca was named by Copper (1995). It is not extant. Its type specimen is Gs85109, a shell (complete shell). Its type locality is A379, which is in a Katian carbonate mudstone in the Vaureal Formation of Canada. It is the type species of Xysila.
Synonymy list
| Year | Name and author |
|---|---|
| 1995 | Xysila astaca Copper p. 849 figs. 3, 4, 5.1-5.10 |
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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.
†Xysila astaca Copper 1995
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. Copper 1995 | Small, elongate, globose, rectimarginate-bisul-cate shells; hypercline area; minute pedicle opening; medially directed spiralia with -four whorls; long jugum arising anteriorly. |