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Pachycheles
Taxonomy
Pachycheles was named by Stimpson (1858). It is extant.
It was assigned to Porcellanidae by Rathbun (1918), Schweitzer et al. (2010), De Angeli and Ceccon (2017), Luque et al. (2017), Beschin et al. (2018) and Schweitzer et al. (2023).
It was assigned to Porcellanidae by Rathbun (1918), Schweitzer et al. (2010), De Angeli and Ceccon (2017), Luque et al. (2017), Beschin et al. (2018) and Schweitzer et al. (2023).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1858 | Pachycheles Stimpson |
| 1862 | Pisosoma Stimpson |
| 1918 | Pachycheles Rathbun p. 134 |
| 2010 | Pachycheles Schweitzer et al. p. 51 |
| 2017 | Pachycheles De Angeli and Ceccon p. 18 |
| 2017 | Pachycheles Luque et al. p. 29 |
| 2018 | Pachycheles Beschin et al. p. 146 |
| 2023 | Pachycheles Schweitzer et al. p. 21 |
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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. Pachycheles Stimpson 1858
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†Pachycheles cristatus Beschin et al. 2018
†Pachycheles dorsosulcatus Beschin et al. 2007
Pachycheles granti Haig 1965
†Pachycheles latus Rathbun 1918
†Pachycheles multituberculatus Beschin et al. 2018
Pachycheles riisei Stimpson 1859
†Pachycheles semiornatus Beschin et al. 2018
Pachycheles stevensii Stimpson 1858
Invalid names: Pisosoma Stimpson 1862 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, o = order, c = class | |||||
| References: Aberhan 1992, Turnsek 1997, Valdez and Clapham 2023 | |||||
Age range
Maximum range based only on fossils: base of the Ypresian to the top of the Holocene or 56.00000 to 0.00000 Ma
Minimum age of oldest fossil (stem group age): 47.8 Ma
Minimum age of oldest fossil (stem group age): 47.8 Ma
Collections (9 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ypresian | Italy | P. dorsosulcatus (140158 226528) | |
| Priabonian | Italy | P. cristatus, P. multituberculatus, P. semiornatus (207550) | |
| Early/Lower Pliocene - Late/Upper Pliocene | Costa Rica | P. stevensii (124270) | |
| Piacenzian - Gelasian | Costa Rica | P. latus (135452) | |
| Holocene | USA (Califormia) | P. rudis (146589) | |
| Holocene | USA (Virgin Islands) | Pisosoma riisei (146588) | |
| Holocene | USA (California) | P. rudis (146590 146591) |