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Eohemithyris
Taxonomy
Eohemithiris was named by Hertlein and Grant IV (1944) [Sepkoski's age data: T Eo R Sepkoski's reference number: 1]. It is not extant. Its type is Eohemithiris alexi.
It was corrected as Eohemithyris by Cooper (1959) and Williams et al. (2002).
It was assigned to Rhynchonellida by Sepkoski (2002); and to Basiliolinae by Cooper (1959) and Williams et al. (2002).
It was corrected as Eohemithyris by Cooper (1959) and Williams et al. (2002).
It was assigned to Rhynchonellida by Sepkoski (2002); and to Basiliolinae by Cooper (1959) and Williams et al. (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1944 | Eohemithiris Hertlein and Grant IV p. 55 |
| 1959 | Eohemithyris Cooper p. 30 |
| 2002 | Eohemithiris Sepkoski |
| 2002 | Eohemithyris Williams et al. p. 1199 |
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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. †Eohemithyris Hertlein and Grant IV 1944
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†Eohemithyris alexi Hertlein and Grant IV 1944
Eohemithyris colurnus Hedley 1905
†Eohemithyris gettysburgensis Cooper 1959
Eohemithyris grayi Woodward 1855
†Eohemithyris miriaensis Craig 1999
†Eohemithyris wildei Craig 1999
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 3 | 7.59 | 5.10 | 13.0 | 6.60 | 4.20 |
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| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Nesnidal et al. 2013 | |||||
Age range
Maximum range based only on fossils: base of the Santonian to the top of the Chattian or 86.30000 to 23.03000 Ma
Minimum age of oldest fossil (stem group age): 83.6 Ma
Minimum age of oldest fossil (stem group age): 83.6 Ma
Collections (12 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Santonian | Australia (Western Australia) | E. wildei (123005 153501 153502 153503 153504 153505 153506) | |
| Maastrichtian | Australia (Western Australia) | E. miriaensis (153499 153500) | |
| Ypresian | USA (California) | E. alexi (187474 187483) | |
| Chattian | USA (Washington) | E. gettysburgensis (187471) |