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Difficilicrinus
Taxonomy
Difficilicrinus was named by Fres et al. (1979) [Sepkoski's age data: O Cara-l Sepkoski's reference number: 251]. It is not extant. Its type is Difficilicrinus coneyi.
It was assigned to Apodasmocrinidae by Frest et al. (1979); to Homocrinidae by Ausich (1998); and to Disparida by Sepkoski (2002).
It was assigned to Apodasmocrinidae by Frest et al. (1979); to Homocrinidae by Ausich (1998); and to Disparida by Sepkoski (2002).
Species
D. coneyi (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1979 | Difficilicrinus Fres et al. |
| 1979 | Difficilicrinus Frest et al. p. 413 |
| 1998 | Difficilicrinus Ausich p. 26 |
| 2002 | Difficilicrinus 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.
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: subc = subclass, c = class, p = phylum | |||||
| References: Aberhan 1992, Aberhan et al. 2004, Kiessling 2004 | |||||
Age range: Blackriveran or 457.30000 to 449.60000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Blackriveran | USA (Virginia) | D. coneyi (202066) |