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Borestus texanus
Taxonomy
Borestus texanus was named by Batten (1995). Its type specimen is AMNH 44926, a shell, and it is not a trace fossil. Its type locality is AMNH locality 2015, Powwow Canyon, which is in a Morrowan offshore shelf limestone in the Magdalena Limestone Formation of Texas.
Synonymy list
| Year | Name and author |
|---|---|
| 1995 | Borestus texanus Batten p. 17 figs. 21a-b |
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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.
†Borestus texanus Batten 1995
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. L. Batten 1995 | Turbiniform shells without surficial ornament.
DESCRIPTION: Turbiniform, moderately low spired shells with a relatively low axial translation and rapid whorl expansion rates. Whorls embracing on spiral cord forming lower margin ofouter whorl face. Upper whorl surface flat to slightly convexo-concave; terminates at periphery in well-developed spiral cord. Vertical outer whorl face narrow with flat selenizone occupying most of face. Selenizone margins are equal size spiral troughs. Narrow, shallow troughs adjacent to selenizone make up rest of outer whorl face. Lower margin of outer whorl face has spiral cord equal in size to upper margin. Base flattened with slightly reinforced growth lines and very faint spiral threads. Phaneromphalus. Aperture unknown. |