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Trachydomia
Taxonomy
Trachydomia was named by Meek and Worthen (1866) [Sepkoski's age data: C Mosc-l P Tatr Sepkoski's reference number: 797,1258]. It is not extant.
It was corrected as Trachydoma by Knight (1933).
It was assigned to Neritidae by Knight (1933); to Neritopsinae by Knight et al. (1960), Batten (1995); to Archaeogastropoda by Sepkoski (2002); and to Trachyspiridae by Nützel et al. (2007), Nützel and Ketwetsuriya (2016).
It was corrected as Trachydoma by Knight (1933).
It was assigned to Neritidae by Knight (1933); to Neritopsinae by Knight et al. (1960), Batten (1995); to Archaeogastropoda by Sepkoski (2002); and to Trachyspiridae by Nützel et al. (2007), Nützel and Ketwetsuriya (2016).
Species
Trachydoma variata (syn. Naticopsis (Naticopsis) mammillaris), T. dussaulti, T. gemmulata, T. gobbetti, T. imbricata, T. minuta, T. newelli, T. nodosa (syn. T. deprati), T. nodulosum, T. oweni, T. raymondi, T. shkurkoi, T. suwanneeae, T. takhliensis, T. turbonitella, T. verrucosa, T. wheeleri, T. whitei
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1866 | Trachydomia Meek and Worthen |
| 1889 | Platychilus Gemmellaro p. 118 |
| 1933 | Trachydoma Knight pp. 363 – 364 |
| 1960 | Trachydomia Knight et al. p. 277 |
| 1995 | Trachydomia Batten pp. 27 – 28 |
| 2002 | Trachydomia Sepkoski |
| 2007 | Trachydomia Nützel et al. p. 220 |
| 2016 | Trachydomia Nützel and Ketwetsuriya p. 502 |
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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. †Trachydomia Meek and Worthen 1866
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†Trachydoma variata Phillips 1836
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Invalid names: Naticopsis (Naticopsis) mammillaris de Koninck 1881 [synonym]
†Trachydomia dussaulti Mansuy 1913
†Trachydomia gemmulata Batten 1979
†Trachydomia gobbetti Batten 1979
†Trachydomia imbricata Batten 1979
†Trachydomia minuta Pan and Erwin 2002
†Trachydomia newelli Knight 1933
†Trachydomia nodosa Meek and Worthen 1860
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Invalid names: Trachydomia deprati Mansuy 1914 [synonym]
†Trachydomia nodulosum Knight 1933
†Trachydomia oweni Knight 1933
†Trachydomia raymondi Sturgeon 1964
†Trachydomia shkurkoi Mazaev 2019
†Trachydomia suwanneeae Ketwetsuriya et al. 2020
†Trachydomia takhliensis Nützel and Ketwetsuriya 2016
†Trachydomia turbonitella Batten 1995
†Trachydomia verrucosa Yin 1932
†Trachydomia wheeleri Swallow 1860
†Trachydomia whitei Knight 1933
Invalid names: Platychilus Gemmellaro 1889 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. B. Knight 1933 | Littoriniform gastropods with thick shell, moderately low spire and anomphalous base; volutions rapidly increasing in size, the body whorl forming most of the shell; sutures well marked, but not deep, a somewhat collarlike unornamented area just below the suture; plane of the aperture somewhat oblique; outer lip thin; columellar lip arcuate, thickened and with a well marked groove within; parietal inductura thick, flattened and extended in the plane of the aperture; a channel at the juncture of the outer lip with the parietal wall, probably excurrent; nuclear whorls smooth, simple and dextral; nepionic ornamentation for about one whorl fine transverse lirae parallel to growth lines, the lirae breaking up into rows of nodes or pustules, which are in some species small and fine but in others very coarse; inner whorls not resorbed; operculum unknown although, because of the evident close relationship to Naticopsis, an operculum similar to that of Naticopsis may be assumed with reasonable safety. | |
| R. L. Batten 1995 | In the initial examination of the Magdalena Neritopsinae, I isolated two groups of specimens. One group has a subsutural and a lower outer whorl face row of spiral nodes; I assigned it to the genus Turbonitella. The other group has multiple spiral rows of nodes on the outer whorl face and it obviously belongs to the genus Trachydomia. As the study progressed, I noted that the Trachydomia species is relatively high-spired, revealing more of the early whorl outer whorl face. The early whorls have two rows of nodes on the outer whorl face, the same as the species of Turbonitella. Further examination showed that the Turbonitella species was, in fact, merely immature specimens of Trachydomia.
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Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 31 | 10.1 | 2.66 | 47.4 | 9.80 | 11.4 | |
| shell diameter | 31 | 11.0 | 4.30 | 52.0 | 9.00 | 14.3 |
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| Reference: Kiessling 2004 | |||||
Age range: base of the Kinderhookian to the top of the Changhsingian or 358.86000 to 251.90200 Ma
Collections (57 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Kinderhookian | USA (Iowa) | Naticopsis variata (49823 49824 49825) | |
| Arundian | Poland (Swietokrzyskie) | Naticopsis variata (60116) | |
| Asbian | Isle of Man | Naticopsis variata (147189) | |
| Brigantian | United Kingdom (England) | Naticopsis variata (57131) | |
| Morrowan | USA (Texas) | T. turbonitella (79966) | |
| Bashkirian | China (Nei Mongol) | Naticopsis variata (673) | |
| Middle Pennsylvanian | USA (Colorado) | T. sp. (276070) | |
| Moscovian | USA (Missouri) | Trachydoma nodosum (69772 69773) | |
| Vereian | Ukraine | T. wheeleri (156384) | |
| Kashirian - Myachkovian | USA (New Mexico) | T. sp., T. whitei (46548) | |
| Desmoinesian | USA (Ohio) | T. spp. (64935 64951) | |
| Desmoinesian | USA (Kansas) | Trachydoma sp. (937 987) Trachydoma wheeleri (991 1008 1018) | |
| Desmoinesian | USA (Missouri) | Trachydoma nodosum (69770 69771) T. oweni (70256 70307 70482) | |
| Desmoinesian | USA (New Mexico) | T. spp., T. raymondi, T. turbonitella, T. nodosa (46536) | |
| Desmoinesian | USA (Pennsylvania) | T. wheeleri (184079 184098) | |
| Missourian | USA (Texas) | T. sp. (156737) | |
| Virgilian | USA (Texas) | T. nodulosa (218010) | |
| Gzhelian - Asselian | China (Hopei) | T. verrucosa (149177) | |
| Asselian | Russian Federation (Bashkortostan) | T. shkurkoi (202158 202159 204134 220885 220899) | |
| Asselian - Sakmarian | Laos | T. dussaulti (233571) | |
| Sakmarian | Russian Federation (Bashkortostan) | T. shkurkoi (220898) | |
| Sakmarian | USA (New Mexico) | T. whitei (39154 39155) | |
| Artinskian | USA (Nevada) | T. sp. (10471 39157) | |
| Kungurian | Mexico (Sonora) | T. sp. (52096) | |
| Kungurian | Malaysia (Perak) | T. gobbetti, T. dussaulti, T. imbricata, T. gemmulata (62131) | |
| Kungurian | USA (Nevada) | T. sp. (10472) | |
| Roadian | Thailand | T. suwanneeae, T. nodosum (103565) | |
| Roadian | Japan | T. nodulosum (132815) | |
| Wordian | Thailand | T. sp. (167694) T. takhliensis (181783) | |
| Wordian | USA (Wyoming) | T. sp. (11225) | |
| Capitanian | Japan | T. nodosa (109667) | |
| Capitanian | Cambodia | T. dussaulti (107276) T. nodosa (107282) | |
| Wuchiapingian | Greece | T. sp. (64171 64174) | |
| Changhsingian | China (Guangxi) | T. minuta (56891) T. sp. (50024) |