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Akadocrinus
Taxonomy
Akadocrinus was named by Prokop (1962) [Sepkoski's age data: Cm uMid]. Its type is Akadocrinus jani.
It was assigned to Eocrinoidea by Sprinkle (1973); to Gogiida by Sepkoski (2002); and to Eocrinidae by Nohejlová and Fatka (2016), Nohejlová and Fatka (2017).
It was assigned to Eocrinoidea by Sprinkle (1973); to Gogiida by Sepkoski (2002); and to Eocrinidae by Nohejlová and Fatka (2016), Nohejlová and Fatka (2017).
Species
A. jani (type species)
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1962 | Akadocrinus Prokop |
| 1973 | Akadocrinus Sprinkle |
| 2002 | Akadocrinus Sepkoski |
| 2016 | Akadocrinus Nohejlová and Fatka p. 2 |
| 2017 | Akadocrinus Nohejlová and Fatka p. 156 |
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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
| Reference | Diagnosis | |
|---|---|---|
| J. Sprinkle 1973 | Eocrinoids having an elongate, flat-topped, irregularly multiplated calyx bearing epispires (sutural pores) medially, numerous biserial brachioles branching off the summit in groups, and a long, large-diameter stem having a few irregularly wedge-shaped columnals proximally, a large diameter lumen, and a rounded, irregularly plated, attachment disk at the distal end. Middle Cambrian (Paradoxides gracilis zone), Jince Beds, Czechoslovakia. | |
| M. Nohejlová and O. Fatka 2016 | Eocrinoids having an elongate, flat-topped, irregularly multiplated calyx bearing epispires (sutural pores) medially, numerous biserial brachioles branching off the summit in groups, and a long, large-diameter stem having a few irregularly wedge-shaped columnals proximally, a large diameter lumen, and a rounded, irregularly plated attachment disk at the distal end. |
Measurements
No measurements are available
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| Source: g = genus, c = class, p = phylum | |||||
| References: Aberhan 1992, Hendy et al. 2009, Aberhan et al. 2004 | |||||
Age range: Drumian or 504.50000 to 500.50000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Cambrian | Czechia (Litavka) | A. nuntius, A. jani (76455) | |
| Drumian | Czechia | A. jani (237960) | |
| Marjumian | Czechia (Středočeský) | A. knizeki, A. jani (186256 186257) |