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Leptoptygma
Taxonomy
Leptoptygma was named by Knight (1936) [Sepkoski's age data: C Serp C Step Sepkoski's reference number: 1,797]. It is not extant.
It was assigned to Subulitinae by Knight et al. (1960); to Neotaenioglossa by Sepkoski (2002); to Strobeidae by Bandel (2002); to Subulitidae by Nützel et al. (2000) and Ketwetsuriya et al. (2020); and to Soleniscidae by Wagner (2023).
It was assigned to Subulitinae by Knight et al. (1960); to Neotaenioglossa by Sepkoski (2002); to Strobeidae by Bandel (2002); to Subulitidae by Nützel et al. (2000) and Ketwetsuriya et al. (2020); and to Soleniscidae by Wagner (2023).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1936 | Leptoptygma Knight |
| 1960 | Leptoptygma Knight et al. p. 320 |
| 2000 | Leptoptygma Nützel et al. p. 595 |
| 2002 | Leptoptygma Bandel |
| 2002 | Leptoptygma Sepkoski |
| 2020 | Leptoptygma Ketwetsuriya et al. p. 70 |
| 2023 | Leptoptygma Wagner p. G657 |
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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. †Leptoptygma Knight 1936
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†Leptoptygma carrizoensis Kues 2004
†Leptoptygma fountainensis Weller 1916
†Leptoptygma golconda Thein and Nitecki 1974
†Leptoptygma gremechaensis Mazaev 2015
†Leptoptygma laetus Pan and Erwin 2002
†Leptoptygma newtonensis Whitfield 1882
†Leptoptygma oligospira Winchell 1863
†Leptoptygma simplex Knight 1931
†Leptoptygma subtilistriatum Knight 1931
†Leptoptygma virgatum Knight 1931
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 3.65 | 1.28 | 10.4 | 5.84 | 6.45 |
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| Source: f = family, o = order | |||||
| References: Bambach et al. 2007, Wagner 2023 | |||||
Age range: base of the Famennian to the top of the Changhsingian or 372.20000 to 252.17000 Ma
Collections (20 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Famennian | USA (Iowa) | Loxonema oligospira (146537) | |
| Brigantian | USA (Alabama) | L. sp. (6769) | |
| Chesterian | USA (Illinois) | Holopea fountainensis (68188) L. golconda (59825) | |
| Chesterian | USA (Ohio) | Holopea newtonensis (128018 128054) | |
| Arnsbergian | China (Ningxia) | L. golconda (671) | |
| Alportian | United Kingdom (England) | L. sp. A, L. sp. B, L. virgatum (182841) L. virgatum (182844) | |
| Kashirian - Myachkovian | USA (New Mexico) | L. sp., L. virgatum, L. subtilistriatum (46548) | |
| Desmoinesian | USA (New Mexico) | L. simplex, L. virgatum, L. subtilistriatum (46536) | |
| Kasimovian | Japan (Gifu) | L. sp. (217899) | |
| Kasimovian | USA (Texas) | Auriptygma subtilistriatum (128580) | |
| Virgilian | USA (New Mexico) | L. carrizoensis (156693 156715) L. virgatum (146828) | |
| Roadian | Russian Federation (Kirov) | L. gremechaensis (126335) | |
| Wordian | Thailand (Ratchaburi) | L. sp. (40954) | |
| Changhsingian | China (Sichuan) | L. laolongdongense (116227) | |
| Changhsingian | China (Guangxi) | L. laetus (56895) |