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Platyschisma
Taxonomy
Platyschisma was named by M'Coy (1844) [Sepkoski's age data: D Eife-u P Leon Sepkoski's reference number: 36,797,1004]. It is not extant. Its type is Ampullaria helicoides. It is the type genus of Platyschismatinae.
It was assigned to Archaeogastropoda by Sepkoski (2002); to Platyschismatinae by Knight et al. (1960), Bouchet et al. (2005); and to Platyceratidae by Wagner (2023).
It was assigned to Archaeogastropoda by Sepkoski (2002); to Platyschismatinae by Knight et al. (1960), Bouchet et al. (2005); and to Platyceratidae by Wagner (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1844 | Platyschisma M'Coy |
| 1960 | Platyschisma Knight et al. p. 198 |
| 2002 | Platyschisma Sepkoski |
| 2005 | Platyschisma Bouchet et al. p. 134 |
| 2023 | Platyschisma Wagner p. G163 |
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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. †Platyschisma M'Coy 1844
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†Platyschisma ambiguum Walcott 1884
†Platyschisma applanatum Sandberger and Sandberger 1855
†Platyschisma barrisi Winchell 1863
†Platyschisma cirroides M'Coy 1844
†Platyschisma depressa Weller 1900
†Platyschisma depressum Dana 1847
†Platyschisma helicoides Sowerby 1826
†Platyschisma infima Perner 1903
†Platyschisma laudoni Rollins 1975
†Platyschisma lingua Yoo 1994
†Platyschisma missouriensis Weller 1899
†Platyschisma ovoidea Phillips 1836
†Platyschisma rotundatum Morris 1845
†Platyschisma vitrea Yoo 1994
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| height | 2 | 28.4 | 23.0 | 35.0 | 29.0 | 8.49 |
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| Source: f = family, superf = superfamily, c = class | |||||
| References: Batten 1984, Knight et al. 1960, Kiessling 2004 | |||||
Age range: base of the Pridoli to the top of the Wuchiapingian or 423.00000 to 254.17000 Ma
Collections (25 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Pridoli | Czech Republic | P. infima (58978) | |
| Eifelian | USA (Nevada) | P. sp. (3827) | |
| Frasnian | USA (California) | Orecopia ambiguum (225958 225959) | |
| Famennian | USA (Iowa) | P. depressa, P. barrisi (146537) | |
| Famennian | Germany (Nordrhein-Westfalen) | P. sp. (38302) | |
| Hastarian | Australia (New South Wales) | P. lingua (43901) | |
| Kinderhookian | USA (Iowa) | P. laudoni (49824 49825) | |
| Tournaisian | Australia (New South Wales) | P. lingua (43904 44079) P. vitrea (44088) | |
| Tournaisian | USA (Iowa) | P. depressa (3309) | |
| Mississippian | USA (Alaska) | P. spp. (112174) | |
| Arundian | Poland (Swietokrzyskie) | P. cirroides (60116) P. helicoides (60115) | |
| Asbian | United Kingdom (England) | P. helicoides (5995) | |
| Brigantian | Ireland (Cork) | P. helicoides (184504) | |
| Brigantian | United Kingdom (England) | P. ovoidea (67670) | |
| Asselian | Australia (Western Australia) | P. sp. (95410) | |
| Sakmarian | Australia (New South Wales) | P. rotundatum (133748 134055) | |
| Wordian | Australia (New South Wales) | P. depressum (133336) P. rotundatum (133337) | |
| Wuchiapingian | Pakistan | P. sp. (126268) |