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Taxonomy
Chionella was named by Cossmann (1886) [Sepkoski's age data: T Eo-u T Ol-l Sepkoski's reference number: 814].
It was replaced with Paradione by Dall (1886); it was reranked as Macrocallista (Chionella) by Vaughn (1921) and Mansfield (1940); it was reranked as Pitar (Chionella) by Mandic and Steininger (2003).
It was assigned to Macrocallista by Vaughn (1921) and Mansfield (1940); to Veneroida by Sepkoski (2002); and to Pitar by Mandic and Steininger (2003).
It was replaced with Paradione by Dall (1886); it was reranked as Macrocallista (Chionella) by Vaughn (1921) and Mansfield (1940); it was reranked as Pitar (Chionella) by Mandic and Steininger (2003).
It was assigned to Macrocallista by Vaughn (1921) and Mansfield (1940); to Veneroida by Sepkoski (2002); and to Pitar by Mandic and Steininger (2003).
Subtaxa
Species lacking formal opinion data
Macrocallista sobrina, Pitar aldrichi, Pitar californiana, Pitar cosanguineus, Pitar kavranensis, Pitar matheroni, Pitar megacostata, Pitar nuttalliopsis, Pitar obliquata, Pitar poulsoni, Pitar protena, Pitar ripleyanus, Pitar sciena, Pitar sculpturata, Pitar semeliformis, Pitar soledadensis, Pitar stantoni, Pitar striata, Pitar subnasuta, Pitar subpellucidum, Pitar swedani, Pitar thompsoni, Pitar turneri, Pitar turneri
Synonymy list
| Year | Name and author |
|---|---|
| 1886 | Chionella Cossmann |
| 1921 | Macrocallista (Chionella) Vaughn |
| 1940 | Macrocallista (Chionella) Mansfield p. 196 |
| 2002 | Chionella Sepkoski |
| 2003 | Pitar (Chionella) Mandic and Steininger p. 278 |
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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. †Pitar (Chionella) Cossmann 1886
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†Macrocallista (Chionella) perduensis Mansfield 1940
†Pitar (Chionella) despecta Deshayes 1857
†Pitar (Chionella) lunularia Deshayes 1825
†Pitar (Chionella) ovalina Deshayes 1857
Diagnosis
No diagnoses are available