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Quadrithyris
Taxonomy
Quadrithyris was named by Havlicek (1957) [Sepkoski's age data: D Gedi-u D Give-l Sepkoski's reference number: 25]. It is not extant. It is the type genus of Quadrithyridinae.
It was reranked as Delthyris (Quadrithyris) by Havlicek (1959).
It was assigned to Delthyris by Havlicek (1959); to Spiriferida by Sepkoski (2002); and to Quadrithyridinae by Williams et al. (2006).
It was reranked as Delthyris (Quadrithyris) by Havlicek (1959).
It was assigned to Delthyris by Havlicek (1959); to Spiriferida by Sepkoski (2002); and to Quadrithyridinae by Williams et al. (2006).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1957 | Quadrithyris Havlicek |
| 1959 | Delthyris (Quadrithyris) Havlicek |
| 2002 | Quadrithyris Sepkoski |
| 2006 | Quadrithyris Williams et al. p. 1863 |
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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. †Quadrithyris Havlicek 1957
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†Quadrithyris minuens Barrande 1879
†Quadrithyris vijaicus Khodalevich 1951
Diagnosis
No diagnoses are available