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Crepicephalus
Taxonomy
Crepicephalus was named by Owen (1852). Its type is Dikelocephalus iowensis.
It was reranked as Arionellus (Crepicephalus) by Meek and Hayden (1861).
It was assigned to Arionellus by Meek and Hayden (1861); to Crepicephalidae by Westrop (1992) and Jell and Adrain (2002); and to Ptychopariida by Sepkoski (2002).
It was reranked as Arionellus (Crepicephalus) by Meek and Hayden (1861).
It was assigned to Arionellus by Meek and Hayden (1861); to Crepicephalidae by Westrop (1992) and Jell and Adrain (2002); and to Ptychopariida by Sepkoski (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1852 | Crepicephalus Owen |
| 1861 | Arionellus (Crepicephalus) Meek and Hayden p. 436 |
| 1992 | Crepicephalus Westrop |
| 2002 | Crepicephalus Jell and Adrain p. 361 |
| 2002 | Crepicephalus 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. †Crepicephalus Owen 1852
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†Crepicephalus australis Palmer 1954
†Crepicephalus ceratopygoides Raymond 1925
†Crepicephalus comus Walcott 1916
†Crepicephalus iowensis Owen 1952
†Crepicephalus thoosa Walcott 1916
Diagnosis
No diagnoses are available