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Isotomocrinus
Taxonomy
Isotomocrinus was named by Ulrich (1925). Its type is Isotomocrinus typus.
It was assigned to Heterocrinidae by Ulrich (1925); to Cincinnaticrininae by Frest et al. (1979); to Disparida by Sepkoski (2002); and to Cincinnaticrinidae by Ausich et al. (1998), Ausich (1998), Ausich et al. (2018).
It was assigned to Heterocrinidae by Ulrich (1925); to Cincinnaticrininae by Frest et al. (1979); to Disparida by Sepkoski (2002); and to Cincinnaticrinidae by Ausich et al. (1998), Ausich (1998), Ausich et al. (2018).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1925 | Isotomocrinus Ulrich |
| 1979 | Isotomocrinus Frest et al. p. 407 |
| 1998 | Isotomocrinus Ausich p. 26 |
| 1998 | Isotomocrinus Ausich et al. |
| 2002 | Isotomocrinus Sepkoski |
| 2018 | Isotomocrinus Ausich et al. |
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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. †Isotomocrinus Ulrich 1925
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†Isotomocrinus apheles Ausich et al. 1998
†Isotomocrinus typicalus Ulrich 1925
†Isotomocrinus typus Ulrich 1925
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: subc = subclass, c = class, p = phylum | |||||
| References: Aberhan et al. 2004, Kiessling 2004, Aberhan 1992 | |||||
Age range: base of the Whiterockian to the top of the Blackriveran or 471.30000 to 449.60000 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Whiterockian | Canada (Newfoundland) | I. apheles (196154 196162 196163) | |
| Blackriveran | USA (illinois) | I. minutus (195626) | |
| Blackriveran - Rocklandian | USA (Minnesota) | I. minutus (23400) | |
| Blackriveran - Rocklandian | USA (Illinois, Iowa) | I. minutus (23454) | |
| Trentonian | Canada (Ontario) | I. typicalus (173359) |