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Oxytoma (Palmoxytoma)
Taxonomy
Palmoxytoma was named by Cox (1961) [Sepkoski's age data: J Hett J Plie-u Sepkoski's reference number: 93]. It is not extant.
It was reranked as Oxytoma (Palmoxytoma) by Cox (1961), Arp and Seppelt (2012).
It was assigned to Pterioida by Sepkoski (2002); to Oxytoma by Cox (1961), Arp and Seppelt (2012); and to Oxytomidae by Ros-Franch et al. (2014).
It was reranked as Oxytoma (Palmoxytoma) by Cox (1961), Arp and Seppelt (2012).
It was assigned to Pterioida by Sepkoski (2002); to Oxytoma by Cox (1961), Arp and Seppelt (2012); and to Oxytomidae by Ros-Franch et al. (2014).
Subtaxa
Species lacking formal opinion data
Oxytoma arizonensis, Oxytoma articostata, Oxytoma censorius, Oxytoma czekanovskii, Oxytoma dumortieri, Oxytoma expansa, Oxytoma ferrugineum, Oxytoma inaequivalis, Oxytoma inaequivalve, Oxytoma intermedia, Oxytoma jacksoni, Oxytoma laevicostata, Oxytoma multistriatum, Oxytoma oppeli, Oxytoma semiradiata, Oxytoma trechmanni
Synonymy list
| Year | Name and author |
|---|---|
| 1961 | Oxytoma (Palmoxytoma) Cox |
| 1961 | Palmoxytoma Cox |
| 2002 | Palmoxytoma Sepkoski |
| 2012 | Oxytoma (Palmoxytoma) Arp and Seppelt p. 46 |
| 2014 | Palmoxytoma Ros-Franch et al. |
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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.
Subg. †Oxytoma (Palmoxytoma) Cox 1961
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†Oxytoma (Palmoxytoma) cygnipes Young and Bird 1822
†Oxytoma (Palmoxytoma) longicostata Stutchbury 1839
†Oxytoma (Palmoxytoma) magnifica Lundgren 1881
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| valve height | 4 | 48.8 | 37.0 | 65.0 | 48.5 | 11.6 |
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| Source: g = genus, o = order, c = class | |||||
| References: Aberhan et al. 2004, Kiessling 2004 | |||||
Age range: base of the Rhaetian to the top of the Margaritatus or 205.70000 to 184.20000 Ma
Collections (43 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Rhaetian | USA (Nevada) | Palmoxytoma sp. (76612) | |
| Angulata | Argentina (Mendoza) | Palmoxytoma sp. (42767) | |
| Early/Lower Hettangian | Chile | Oxytoma cygnipes (95556) | |
| Hettangian | Argentina (Mendoza) | Palmoxytoma cygnipes (36939 50819) | |
| Hettangian | Chile | Oxytoma sp. (58536) | |
| Hettangian - Pliensbachian | New Zealand | Palmoxytoma sp. (38928) | |
| Early/Lower Jurassic | Canada (Alberta) | Oxytoma cygnipes (53415) | |
| Early/Lower Sinemurian | Canada (British Columbia) | Oxytoma cygnipes (53362) | |
| Early/Lower Sinemurian | Germany | Oxytoma cygnipes (28897) | |
| Semicostatum | Canada (Alberta) | Oxytoma cygnipes (133090) | |
| Sinemurian | Canada (Alberta) | Oxytoma cygnipes (53291 53292 53393 53410 53414 53417 53419 53902) | |
| Sinemurian | Canada (British Columbia) | Oxytoma cygnipes (53416) | |
| Sinemurian | Japan (Yamaguchi) | Oxytoma cygnipes (40560) | |
| Sinemurian - Pliensbachian | Canada (Alberta) | Oxytoma cygnipes (53391 53901) | |
| Sinemurian - Pliensbachian | Canada (Northwest Territories) | Oxytoma cygnipes (34221) | |
| Sinemurian - Pliensbachian | Russian Federation | Oxytoma cygnipes (39332) | |
| Late/Upper Pliensbachian | Germany (North Rhine-Westphalia) | Palmoxytoma cygnipes (225390 225401) | |
| Margaritatus | Germany | Oxytoma cygnipes (112790) | |
| Margaritatus | Germany (Niedersachsen) | Oxytoma cygnipes (126924) | |
| Pliensbachian | United Kingdom | Palmoxytoma cygnipes (213635 213637 213648 213649 213650 213651 213652 213655) | |
| Pliensbachian | Greenland | Oxytoma cygnipes (162052) | |
| Pliensbachian | Canada (Yukon) | Oxytoma cygnipes (34222) | |
| Spinatum | Germany | Palmoxytoma cygnipes (159446 228498) | |
| Late/Upper Pliensbachian - Early/Lower Toarcian | Canada (British Columbia) | Oxytoma cygnipes (53418) | |
| Pliensbachian - Early/Lower Toarcian | Russian Federation | Oxytoma cygnipes (129766) |