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Pachymyonia
Taxonomy
Pachymyonia was named by Dun (1932) [Sepkoski's age data: P Sakm P Guad-u]. Its type is Maeonia morrisii.
It was reranked as Myonia (Pachymyonia) by Clarke (1992).
It was assigned to Sanguinolitinae by Morris et al. (1991); to Myonia by Clarke (1992); to Pholadomyoida by Sepkoski (2002); and to Vacunellinae by Biakov (2022).
It was reranked as Myonia (Pachymyonia) by Clarke (1992).
It was assigned to Sanguinolitinae by Morris et al. (1991); to Myonia by Clarke (1992); to Pholadomyoida by Sepkoski (2002); and to Vacunellinae by Biakov (2022).
Synonymy list
| Year | Name and author |
|---|---|
| 1932 | Pachymyonia Dun p. 411 |
| 1991 | Pachymyonia Morris et al. p. 94 |
| 1992 | Myonia (Pachymyonia) Clarke p. 30 |
| 2002 | Pachymyonia Sepkoski |
| 2022 | Pachymyonia Biakov p. 154 |
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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. †Pachymyonia Dun 1932
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†Pachymyonia bulkurensis Astafieva-Urbajtis 1976
†Pachymyonia corrugata Fletcher 1932
†Pachymyonia elata Popow 1957
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Invalid names: Myonia (Pachymyonia) bicarinata Astafieva-Urbaitis 1976 [synonym]
†Pachymyonia etheridgei Dun 1932
†Pachymyonia morrisi Etheridge Jr. 1919
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Invalid names: Myonia davidis Dun 1932 [synonym], Myonia farleyensis Dun 1932 [synonym]
†Pachymyonia occidentalis Dickins 1957
†Pachymyonia triangulata Waterhouse 1969
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 11 | 34.7 | 19.0 | 44.0 | 33.0 | 8.27 | |
| valve height | 17 | 36.9 | 18.0 | 74.7 | 36.7 | 17.0 |
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| Source: g = genus, c = class | |||||
| References: Aberhan et al. 2004, Clapham 2015 | |||||
Age range: base of the Bashkirian to the top of the Changhsingian or 323.20000 to 252.17000 Ma
Collections (60 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Bashkirian - Moscovian | Argentina | P. sp. (64621) | |
| Sakmarian | Australia (Western Australia) | P. occidentalis (87352 107347) P. sp. (88214) | |
| Sakmarian | Australia (New South Wales) | Maeonia morrisii (62908 133333) P. etheridgei (133742) P. morrisii, P. etheridgei (134517) | |
| Sakmarian | India | P. sp. (89378) | |
| Sakmarian | Australia (Tasmania) | Myonia morrisi (105481 105484 105490 105493 131773) | |
| Artinskian | Australia (Queensland) | Myonia morrisi (85046 85047 85855 135928 135929 135931 135932) P. sp. (39937) | |
| Artinskian | Australia (New South Wales) | Maeonia morrisii (132307) Myonia davidis (132321 136669) Myonia farleyensis (101324) | |
| Roadian | New Zealand (Southland) | P. sp. A (41781) | |
| Roadian | Australia (New South Wales) | Myonia corrugata (120243) | |
| Wordian | Australia (Tasmania) | Myonia corrugata (135938) | |
| Wordian | New Zealand (Southland) | P. triangulata (41767) | |
| Wordian | Australia (Queensland) | Myonia corrugata (116735) | |
| Wordian | Russian Federation | P. bulkurensis (102218) P. sp. (221249) | |
| Capitanian | Russian Federation | Myonia bulkurensis (113985 198795 198805) Myonia elata (114416) P. elata (198790 221258 221259 221260) | |
| Capitanian | New Zealand (Southland) | P. corrugata, P. triangulata (41777) P. triangulata (41788 41789) | |
| Wuchiapingian | Australia (Queensland) | Myonia corrugata (83192 83216 83265 135933 135934 135937) P. corrugata (103955) P. triangulata (98098 104763 120329 120336 120340 120341 120342) | |
| Wuchiapingian | Russian Federation | P. bicarinata (102205) | |
| Changhsingian | Russian Federation | P. bicarinata (102210) |