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Trochotoma
Taxonomy
Trochotoma was named by Eudes-Deslongchamps (1843) [Sepkoski's age data: Tr Olen-u J Tith-u Sepkoski's reference number: 1130]. It is the type genus of Trochotomidae.
It was assigned to Archaeogastropoda by Sepkoski (2002); and to Trochotomidae by Cox (1960), Bouchet et al. (2005).
It was assigned to Archaeogastropoda by Sepkoski (2002); and to Trochotomidae by Cox (1960), Bouchet et al. (2005).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1843 | Trochotoma Eudes-Deslongchamps |
| 1960 | Trochotoma Cox p. 220 |
| 2002 | Trochotoma Sepkoski |
| 2005 | Trochotoma Bouchet et al. p. 176 |
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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. †Trochotoma Eudes-Deslongchamps 1843
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Subg. †Trochotoma (Discotoma)
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†Discotoma planoconvexa Yu et al. 1974
†Trochotoma (Discotoma) gansuensis Tong and Erwin 2001
†Trochotoma (Discotoma) multipleura Pan 1977
†Trochotoma (Discotoma) yunnanensis Pan 1977
Subg. †Trochotoma (Trochotoma) Eudes-Deslongchamps 1843
†Trochotoma (Trochotoma) affinis Eudes and Deslongchamps 1843
†Trochotoma clypeus Terquem 1855
†Trochotoma elegans Gemmellaro 1889
†Trochotoma maubertense Terquem and Piette 1865
†Trochotoma orbita Pan 1982
†Trochotoma prisca Gemmellaro 1889
†Trochotoma striatum Hornes 1853
†Trochotoma vetusta Terquem 1855
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Invalid names: Trochotoma brocastellensis Moore 1867 [synonym]
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 26 | 12.9 | 4.00 | 26.5 | 16.8 | 6.98 |
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| Source: superf = superfamily, c = class | |||||
| References: Bambach et al. 2007, Kiessling 2004 | |||||
Age range: base of the Wordian to the top of the Late/Upper Oxfordian or 266.90000 to 154.80000 Ma
Collections (22 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Wordian | Italy | T. elegans, T. prisca (108672) | |
| Smithian | China (Guizhou) | T. orbita (137825) | |
| Anisian | China (Gansu) | T. gansuensis (119266) | |
| Anisian | China (Guizhou) | Discotoma planoconvexa (98055) | |
| Carnian | China (Yunnan) | T. yunnanensis, T. multipleura (165315) | |
| Alaunian | China (Yunnan) | T. yunnanensis (165402) | |
| Rhaetian | Austria (Vienna) | T. praecursor (233865) | |
| Angulata | Luxembourg | T. clypeus (149761) T. vetusta (149756) | |
| Angulata | France (Lorraine) | T. vetusta, T. clypeus (53947) | |
| Bucklandi - Semicostatum | Hong Kong | Discotoma sp. (275835) | |
| Late/Upper Sinemurian | Hungary | Discotoma sp. (118984) | |
| Sinemurian | Italy | T. vetusta (80016) | |
| Davoei | Hungary | T. striatum (109159) | |
| Jamesoni | Türkiye | T. striatum (200773) | |
| Margaritatus | Hungary (Veszprém Megye) | T. striatum (45472) | |
| Margaritatus | Hungary | T. striatum (108895) | |
| Early/Lower Bajocian - Late/Upper Oxfordian | Romania (Brasov) | T. affinis (81442) | |
| Bathonian | France | T. tabulata, T. petrariae (38738) | |
| Bathonian | United Kingdom (England) | T. obtusa (36556) | |
| Middle Oxfordian | France | T. amata, T. mastoidea (11084) T. mastoidea (11085) |