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Taxonomy
Helieranella was named by Baldis and Gonzalez (1984) [Sepkoski's age data: O Trem Sepkoski's reference number: ZR87]. It is not extant.
It was assigned to Ptychopariida by Sepkoski (2002); and to Olenidae by Jell and Adrain (2002).
It was assigned to Ptychopariida by Sepkoski (2002); and to Olenidae by Jell and Adrain (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1984 | Helieranella Baldis and Gonzalez |
| 2002 | Helieranella Jell and Adrain p. 383 |
| 2002 | Helieranella Sepkoski |
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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. †Helieranella Baldis and Gonzalez 1984
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Diagnosis
No diagnoses are available