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Geffenina posterodorsospina
Taxonomy
Geffenina posterodorsospina was named by Chitnarin (2012). Its type specimen is SUT-09-1451, a carapace, and it is a 3D body fossil. Its type locality is 07PB03-3, Khao Kana, Phetchabun, which is in an Asselian/Sakmarian carbonate wackestone in the Pha Nok Khao Formation of Thailand.
Synonymy list
| Year | Name and author |
|---|---|
| 2012 | Geffenina posterodorsospina Chitnarin p. 814 fig. 8A |
| 2015 | Geffenina posterodorsospina Zazzali et al. p. 304 figs. 15A, B |
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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.
†Geffenina posterodorsospina Chitnarin 2012
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| valve height | 3 | 0.415 | 0.380 | 0.460 | 0.410 | 0.040 |
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| Source: o = order, c = class | |||||
| References: Alvarez et al. 2008, Kiessling 2004 | |||||
Age range: base of the Asselian to the top of the Wuchiapingian or 298.90000 to 254.14000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Asselian - Sakmarian | Thailand | Geffenina posterodorsospina (137895 type locality: 137896 137897 137898) | |
| Wuchiapingian | China (Sichuan) | Geffenina posterodorsospina (189472) |