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Hemicyclaspis
Taxonomy
Hemicyclaspis was named by Lankaster (1870) [Sepkoski's age data: S Ludl-l S Prid Sepkoski's reference number: 672].
It was assigned to Atelaspidiformes by Sepkoski (2002); to Osteostraci by Sansom (2009); and to Ateleaspididae by Tinn and Märss (2018).
It was assigned to Atelaspidiformes by Sepkoski (2002); to Osteostraci by Sansom (2009); and to Ateleaspididae by Tinn and Märss (2018).
Species
Species lacking formal opinion data
Entered
by J. Sepkoski on 2003-01-23; modified by P. Novack-Gottshall on 2026-05-31
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1870 | Hemicyclaspis Lankaster |
| 1945 | Hemiteleaspis Westoll |
| 2002 | Hemicyclaspis Sepkoski |
| 2009 | Hemicyclaspis Sansom p. 112 |
| 2018 | Hemicyclaspis Tinn and Märss p. 4 |
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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. †Hemicyclaspis Lankaster 1870
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†Hemicyclaspis murchisoni Lankester 1870
Invalid names: Hemiteleaspis Westoll 1945 [synonym]
Diagnosis
No diagnoses are available