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Protostylus
Taxonomy
Protostylus is a genus. It is not extant. Its type is Protostylus lantenoisi.
It was assigned to Procerithiidae by Batten (1985); to Neotaenioglossa by Sepkoski (2002); to Orthonematidae by Nützel and Ketwetsuriya (2016); and to Coelostylinidae by Ketwetsuriya et al. (2020).
It was assigned to Procerithiidae by Batten (1985); to Neotaenioglossa by Sepkoski (2002); to Orthonematidae by Nützel and Ketwetsuriya (2016); and to Coelostylinidae by Ketwetsuriya et al. (2020).
Species
P. exiguus, P. lantenoisi (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1985 | Protostylus Batten p. 22 |
| 2002 | Protostylus Sepkoski |
| 2016 | Protostylus Nützel and Ketwetsuriya p. 505 |
| 2020 | Protostylus Ketwetsuriya et al. p. 71 |
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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. †Protostylus
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†Protostylus exiguus Wang 1980
†Protostylus lantenoisi Mansuy 1914
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 14 | 3.23 | 1.60 | 8.20 | 3.05 | 2.32 | |
| shell diameter | 14 | 1.28 | 0.800 | 2.80 | 1.00 | 0.676 |
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| Source: c = class | |||||
| Reference: Kiessling 2004 | |||||
Age range: base of the Kungurian to the top of the Changhsingian or 283.30000 to 251.90200 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Kungurian | Malaysia (Perak) | P. lantenoisi (62131) | |
| Roadian | Thailand | P. sp. (103565) | |
| Wordian | Thailand | P. sp. (181783) | |
| Wordian | Thailand (Ratchaburi) | P. sp. (40954) | |
| Capitanian | Cambodia | Trypanostylus cerithiformis (107282) | |
| Capitanian | Japan | P. sp. 1, P. sp. 2 (109667) | |
| Changhsingian | China (Guizhou) | P. exiguus (112091) |