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Exaesiodiscus
Discussion
Disarticulated columnals, according to Ubaghs, et al., 1978: T933
Taxonomy
Exaesiodiscus was named by Moore and Jeffords (1968). It is considered to be a form taxon.
It was assigned to Exaesiodiscidae by Moore and Jeffords (1968); and to Crinoidea by Stepanova (1990).
It was assigned to Exaesiodiscidae by Moore and Jeffords (1968); and to Crinoidea by Stepanova (1990).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1968 | Exaesiodiscus Moore and Jeffords |
| 1990 | Exaesiodiscus Stepanova |
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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. †Exaesiodiscus Moore and Jeffords 1968
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†Exaesiodiscus compositus Gluchowski 1993
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: c = class, p = phylum | |||||
| References: Kiessling 2004, Aberhan 1992 | |||||
Age range: base of the Ludlow to the top of the Late/Upper Frasnian or 426.70000 to 372.15000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ludlow - Pridoli | Russian Federation | E. sp. (24781) | |
| Early/Lower Frasnian | Russian Federation (Orenburgskaya Oblast) | E. minutus (83918) | |
| Middle Frasnian - Late/Upper Frasnian | Poland (Świętokrzyskie) | E. compositus (123052) |