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Ophiletina bromidensis
Taxonomy
Oriostoma bromidensis was named by Rohr and Johns (1990). Its type specimen is USNM 446830, a shell, and it is a 3D body fossil. Its type locality is Strip quarry ~20 m west of road to Buckhorn Ranch house, ~25 km S. of Sulfur, which is in a Blackriveran offshore shale/limestone in the Bromide Formation of Oklahoma.
It was recombined as Ophiletina bromidensis by Wagner (1999) and Wagner (2023).
It was recombined as Ophiletina bromidensis by Wagner (1999) and Wagner (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1990 | Oriostoma bromidensis Rohr and Johns pp. 733 – 735 figs. 2.1 - 2.5 |
| 1999 | Ophiletina bromidensis Wagner p. 101 |
| 2023 | Ophiletina bromidensis Wagner p. 3388 |
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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.
†Ophiletina bromidensis Rohr and Johns 1990
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. M. Rohr and R. A. Johns 1990 | Small, low-spired, phaneromphalous shell with circular whorl profile, four strong spiral cords, and prosocline, collabral lamella.
Small (8 mm in diameter), low-spired (1550), widely phaneromphalous gastropod with four strong carina and crenulate growth lines; whorls circular, upper and lower sutures impressed; four carina present: at whorl crest, upper-outer edge, lower-outer edge, and base of whorl; whorl surface between cords broadly concave; strongly crenulated growth lines, slightly prosocline, flare outward when crossing upper carina; aperture not preserved, growth lines suggest it is regular in shape, proso-cline; presence of septa, operculum, and nacreous inner layer all unknown. | |
| P. J. Wagner 2023 | This species lacks any diagnostic features of Oriostoma, but shares several synapomorphies with Ophiletina including: 1) a weak V-shaped sinus at the top of the whorl, culminating in a broad dull selenizone; 2) a very strong left-ramp carina positioned above the LR:base border; 3) a “sigmoidal” aperture, with the aperture projecting forward from the base and then curving backward on the left ramp; 4) a strong, projecting (but dull) umbilical carina. |