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Loxophragmus
Taxonomy
Loxophragmus was named by Cooper and Grant (1974) [Sepkoski's age data: P Leon-m P Leon-u Sepkoski's reference number: 7].
It was assigned to Lyttoniinae by Williams et al. (2000); and to Strophomenida by Sepkoski (2002).
It was assigned to Lyttoniinae by Williams et al. (2000); and to Strophomenida by Sepkoski (2002).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1974 | Loxophragmus Cooper and Grant p. 432 |
| 1982 | Palaeoldhamina Liang p. 230 |
| 1990 | Juxoldhamina imparilisa Liang p. 236 figs. Pl 40, figs 13-17 |
| 1990 | Juxoldhamina spicula Liang p. 236 figs. Pl 40, fig 4 |
| 2000 | Loxophragmus Williams et al. p. 634 |
| 2002 | Loxophragmus Sepkoski |
| 2002 | Palaeoldhamina Sepkoski |
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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. †Loxophragmus Cooper and Grant 1974
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†Loxophragmus ellipticus Cooper and Grant 1974
†Loxophragmus kuzishanensis Liang 1982
Invalid names: Juxoldhamina imparilisa Liang 1990 [nomen dubium], Juxoldhamina spicula Liang 1990 [nomen dubium], Palaeoldhamina Liang 1982 [synonym]
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 12 | 6.77 | 5.50 | 9.60 | 6.50 | 1.25 |
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| Source: subo = suborder, c = class, p = phylum | |||||
| References: Aberhan et al. 2004, Williams et al. 2000 | |||||
Age range: base of the Kungurian to the top of the Changhsingian or 283.30000 to 251.90200 Ma
Collections (18 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Kungurian | Japan | L. ellipticus (181933) | |
| Kungurian | USA (Texas) | L. ellipticus (43491 43494 43498 43504 43510 43515 43516 81638 101811 105938) | |
| Roadian | China (Yunnan) | L. sp. (62456) | |
| Wordian | China (Zhejiang) | Palaeoldhamina kuzishanensis (120078) | |
| Capitanian | China (Zhejiang) | Juxoldhamina imparilisa (95519 111932 111934) Juxoldhamina imparilisa, Juxoldhamina spicula (111933) | |
| Changhsingian | China (Guizhou) | L. sp. (105173) |