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Archaeocothurnus bifida
Taxonomy
Cothurnocystis bifida was named by Ubaghs and Robison (1988). Its type specimen is USNM 41580 (whole animal) and is a 3D body fossil. Its type locality is Carpoid Quarry, which is in a Marjumian deep subtidal ramp mudstone in the Wheeler Formation of Utah. It is the type species of Archaeocothurnus.
It was recombined as Archaeocothurnus bifida by Sumrall et al. (1997).
It was recombined as Archaeocothurnus bifida by Sumrall et al. (1997).
Synonymy list
| Year | Name and author |
|---|---|
| 1988 | Cothurnocystis bifida Ubaghs and Robison pp. 7 - 16 figs. 4-10 |
| 1997 | Archaeocothurnus bifida Sumrall et al. p. 1098 |
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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.
†Archaeocothurnus bifida Ubaghs and Robison 1988
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. Ubaghs and R. A. Robison 1988 | Theca having very elongate posterior lobe; inferior face of right and left anterior marginal plates with simple denticulate thickenings (no spikes); spinal process large, glossal moderately large, digital small, a mere outgrowth of left posterior marginal; integument within marginal frame of inferior thecal face a nonplated sheet of extremely thin retiform stereom; adoral plates two or, more likely, three; cothurnopores probably present. Aulacophore about one-third longer than theca; proximal region having 8 rings; inferior face of ossicles in distal region flat or slightly concave; cover plates with forked tips. |