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Pachylasmatidae
Taxonomy
Pachylasmatidae was named by Utinomi (1968). It is extant. Its type is Pachylasma.
It was assigned to Chionolasmatoidea by Jones (2007); to Pachylasmatoidea by Chan et al. (2010); and to Chthamaloidea by Chan et al. (2021).
It was assigned to Chionolasmatoidea by Jones (2007); to Pachylasmatoidea by Chan et al. (2010); and to Chthamaloidea by Chan et al. (2021).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1968 | Pachylasmatidae Utinomi |
| 2007 | Pachylasmatidae Jones p. 293 |
| 2010 | Pachylasmatidae Chan et al. p. 41 |
| 2021 | Pachylasmatidae Chan 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.
Fm. Pachylasmatidae Utinomi 1968
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G. Eutomolasma Jones 2000
Subfm. Pachylasmatinae Utinomi 1968
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G. Atetralasma Newman and Jones 2011
G. Eurylasma Jones 2000
G. Microlasma Jones 2000
G. Pachylasma Darwin 1854
G. Pseudoctomeris Poltarukha 1996
G. Tetrapachylasma Foster 1988
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: c = class | |||||
| Reference: Kiessling 2004 | |||||
Age range
Maximum range based only on fossils: base of the Waipawan to the top of the Calabrian or 56.00000 to 0.77400 Ma
Minimum age of oldest fossil (stem group age): 52.0 Ma
Minimum age of oldest fossil (stem group age): 52.0 Ma
Collections (8 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Waipawan | New Zealand (Chatham Islands) | Pachylasma veteranum (52559 52561) | |
| Waipawan | New Zealand | Eolasma maxwelli (52447) | |
| Bortonian - Kaiatan | New Zealand | Pachylasma distortum (52129 63107) | |
| Aquitanian | New Zealand | Pachylasma southlandicum (146341) | |
| Messinian | Spain | Pachylasma sp. (56687) | |
| Calabrian | Greece | Pachylasma giganteum (190371) |