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Nisusia howelli
Taxonomy
Nisusia howelli was named by Shaw (1957). Its type specimen is MCZ 9353, a shell, and it is not a trace fossil. Its type locality is SA-C-8, which is in a St Davids carbonate limestone/shale in the Parker Slate Formation of Vermont.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1957 | Nisusia howelli Shaw pp. 786 - 789 figs. pl. 99 f. 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.
†Nisusia howelli Shaw 1957
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. B. Shaw 1957 | The shell is transverse, faintly sulcate, with a well developed apsacline interarea. The xenidium is present as in all Nisusiae. The distinctive feature of the shell is its regular costellate ribbing, which is unlike the irregular, rough, coarser ribbing of the other species in the Parker. |