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Oligorhachis
Taxonomy
Oligorhachis was named by Imbrie (1959) [Sepkoski's age data: D Fras-l Sepkoski's reference number: 25]. Its type is Oligorachis oligorachis.
It was corrected as Oligorachis by Muir-Wood and Cooper (1960), Sepkoski (2002).
It was assigned to Productacea by Imbrie (1959); to Heteralosiinae by Muir-Wood and Cooper (1960); to Donalosiinae by Williams et al. (2000); and to Strophomenida by Sepkoski (2002).
It was corrected as Oligorachis by Muir-Wood and Cooper (1960), Sepkoski (2002).
It was assigned to Productacea by Imbrie (1959); to Heteralosiinae by Muir-Wood and Cooper (1960); to Donalosiinae by Williams et al. (2000); and to Strophomenida by Sepkoski (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1959 | Oligorhachis Imbrie p. 403 |
| 1960 | Oligorachis Muir-Wood and Cooper p. 91 |
| 2000 | Oligorhachis Williams et al. p. 582 |
| 2002 | Oligorachis Sepkoski |
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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. †Oligorhachis Imbrie 1959
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: subo = suborder, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Williams et al. 2000, Aberhan et al. 2004 | |||||
Age range: base of the Early/Lower Givetian to the top of the Middle Givetian or 387.95000 to 383.40000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Givetian - Middle Givetian | USA (Michigan) | O. oligorhachis (231664) | |
| Givetian | USA (Michigan) | O. oligorhachis (206795) |