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Xestosia
Taxonomy
Xestosia was named by Cooper and Grant (1975) [Sepkoski's age data: P Leon-m P Leon-u Sepkoski's reference number: 7]. Its type is Xestosia obsolescens.
It was assigned to Paucispiniferini by Williams et al. (2000); to Strophomenida by Sepkoski (2002); and to Rugatiini by Lazarev (2011).
It was assigned to Paucispiniferini by Williams et al. (2000); to Strophomenida by Sepkoski (2002); and to Rugatiini by Lazarev (2011).
Species
X. obsolescens (type species), X. schucherti
Entered
by J. Sepkoski on 2003-01-23; modified by M. Clapham on 2013-10-27
Synonymy list
| Year | Name and author |
|---|---|
| 1975 | Xestosia Cooper and Grant p. 1063 |
| 2000 | Xestosia Williams et al. p. 449 |
| 2002 | Xestosia Sepkoski |
| 2011 | Xestosia Lazarev p. 31 |
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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. †Xestosia Cooper and Grant 1975
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†Xestosia obsolescens Cooper and Grant 1975
†Xestosia schucherti King 1931
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 8 | 19.0 | 15.3 | 29.5 | 18.8 | 4.42 |
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| Source: subo = suborder, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Nesnidal et al. 2013, Williams et al. 2000 | |||||
Age range: base of the Artinskian to the top of the Wordian or 290.10000 to 264.28000 Ma
Collections (42 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Artinskian | USA (Texas) | Productus schucherti (150792) | |
| Kungurian | USA (Texas) | Productus schucherti (113192 113193 113195 121457 121458 149780 149785 149787 149823 149832 149860 149932 149949 149986 149994 149997 150245 150246 150554 150556 150557 150845 150862 150863) X. obsolescens (43491 43510) X. schucherti (43574 43595 43602 44519 44565 101785 105687 105880 105883 106034 106174) | |
| Kungurian - Roadian | USA (Texas) | Productus schucherti (149824) | |
| Roadian | Mexico (Coahuila) | Productus schucherti (133173) | |
| Roadian | USA (Texas) | Productus schucherti (149786) | |
| Wordian | USA (Texas) | Productus schucherti (150261) |