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Spirodentalium walcotti
Taxonomy
Hyolithes walcotti was named by Howell (1946). Its type specimen is USNM 23851, a shell, and it is a 3D body fossil.
It was recombined as Macluritella walcotti by Yochelson and Stinchcomb (1987); it was recombined as Spirodentalium walcotti by Wagner (2023).
It was recombined as Macluritella walcotti by Yochelson and Stinchcomb (1987); it was recombined as Spirodentalium walcotti by Wagner (2023).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1890 | Hyolithes curvatus Walcott pp. 269 – 270 figs. pl. 20 f. 7, 7a |
| 1946 | Hyolithes walcotti Howell p. 71 |
| 1987 | Macluritella walcotti Yochelson and Stinchcomb pp. 57 – 59 figs. 1.1, 1.2 |
| 2023 | Spirodentalium walcotti Wagner |
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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.
†Spirodentalium walcotti Howell 1946
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Invalid names: Hyolithes curvatus Walcott 1890 [replaced]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. L. Yochelson and B.L. Stinchcomb 1987 | Open-coiled, sinistral gastropods having a distinctly triangular whorl profile. Early growth stages unknown; body whorl widely open-coiled, the largest specimens completing about one-quarter of a whorl, and by inference the early stages are also open-coiled. Whorl profile that of an acute triangle, inclinations of inner and outer whorl faces nearly identical. Base of each face on interior flaring outward to form a narrow basal rim. Base of whorl on interior gently convex downward. Whorl profile essentially bilaterally symmetrical. Growth lines closely spaced on inner side of whorl and nearly vertical; growth lines on base curving gently prosocline; unknown on outer whorl face or crossing sharp keel. Ornamented on basal surface by numerous lirae. |
Measurements
No measurements are available
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| Source: f = family | |||||
| Reference: Kiessling 2004 | |||||
Age range: Trempealeauan or 492.50000 to 485.40000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Trempealeauan | USA (Nevada) | Hyolithes curvatus (93574) | |
| Trempealeauan | USA (Missouri) | Macluritella walcotti (93582) |