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Pachyrisma
Taxonomy
Pachyrisma was named by Morris and Lycett (1850) [Sepkoski's age data: J Bath Sepkoski's reference number: 1066]. It is not extant. Its type is Pachyrisma grande.
It was assigned to Hippuritoida by Sepkoski (2002); to Pachyrismatidae by Bouchet et al. (2010); and to Megalodontidae by Kiessling (2003) and Ros-Franch et al. (2014).
It was assigned to Hippuritoida by Sepkoski (2002); to Pachyrismatidae by Bouchet et al. (2010); and to Megalodontidae by Kiessling (2003) and Ros-Franch et al. (2014).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1850 | Pachyrisma Morris and Lycett |
| 2002 | Pachyrisma Sepkoski |
| 2003 | Pachyrisma Kiessling |
| 2010 | Pachyrisma Bouchet et al. |
| 2014 | Pachyrisma Ros-Franch et al. |
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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. †Pachyrisma Morris and Lycett 1850
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Subg. †Pachyrisma (Pachymegalodon) Gümbel 1862
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†Pachymegalodus nimassicus Krumbeck 1923
†Pachymegalodus timorensis Wanner 1910
Subg. †Pachyrisma (Pachyrismella)
†Pachyrisma grande Morris and Lycett 1850
†Pachyrisma rimosum Münster 1841
Diagnosis
No diagnoses are available