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Yakovlevia hessorum
Taxonomy
Yakovlevia hessorum was named by Cooper and Grant (1975). Its type specimen is USNM 153980h, a valve (Ventral valve), and it is not a trace fossil.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1975 | Yakovlevia hessorum Cooper and Grant p. 1181 figs. Pl 434, figs 1-8; pl 452, figs 29-34; pl 473, figs 1-17; pl 474, figs 1-24 |
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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.
†Yakovlevia hessorum Cooper and Grant 1975
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 15 | 12.5 | 3.60 | 19.7 | 14.4 | 4.68 |
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| Source: subo = suborder, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004, Williams et al. 2000 | |||||
Collections (9 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Roadian | USA (Texas) | Yakovlevia hessorum (43548 43553 81645 102605 102614 105592 105887) | |
| Roadian - Wordian | USA (Texas) | Yakovlevia hessorum (106046) | |
| Wordian | USA (Texas) | Yakovlevia hessorum (43557) |