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Acirsa (Hemiacirsa)
Taxonomy
Hemiacirsa was named by de Boury (1890) [Sepkoski's age data: K Sant R Sepkoski's reference number: 909].
It was reranked as Scalaria (Hemiacirsa) by Tate (1890); it was reranked as Acirsa (Hemiacirsa) by Palmer and Brann (1966) and Kase (1984).
It was assigned to Scalaria by Tate (1890); to Acirsa by Palmer and Brann (1966) and Kase (1984); and to Neotaenioglossa by Sepkoski (2002).
It was reranked as Scalaria (Hemiacirsa) by Tate (1890); it was reranked as Acirsa (Hemiacirsa) by Palmer and Brann (1966) and Kase (1984).
It was assigned to Scalaria by Tate (1890); to Acirsa by Palmer and Brann (1966) and Kase (1984); and to Neotaenioglossa by Sepkoski (2002).
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1890 | Scalaria (Hemiacirsa) Tate |
| 1890 | Hemiacirsa de Boury |
| 1966 | Acirsa (Hemiacirsa) Palmer and Brann p. 475 |
| 1984 | Acirsa (Hemiacirsa) Kase p. 165 |
| 2002 | Hemiacirsa 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.
Subg. †Acirsa (Hemiacirsa) de Boury 1890
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†Acirsa (Hemiacirsa) americana Wade 1926
†Acirsa (Hemiacirsa) gracilior Meyer 1886
†Acirsa (Hemiacirsa) whitneyi Palmer 1937
Diagnosis
No diagnoses are available