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Hypergonia attenuata
Taxonomy
Murchisonia attenuata was named by Hall (1856). It is a 3D body fossil.
It was recombined as Solenospira attenuata by Ulrich and Scofield (1897); it was recombined as Ectomaria attenuata by Yochelson and Saunders (1967); it was recombined as Hypergonia attenuata by Wagner (2023).
It was recombined as Solenospira attenuata by Ulrich and Scofield (1897); it was recombined as Ectomaria attenuata by Yochelson and Saunders (1967); it was recombined as Hypergonia attenuata by Wagner (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1856 | Murchisonia attenuata Hall p. 27 |
| 1882 | Murchisonia attenuata Whitfield pp. 88 - 89 figs. pl. 9 f. 13 |
| 1883 | Murchisonia attenuata Hall pp. 360 - 361 figs. pl. 32 f. 13 |
| 1897 | Solenospira attenuata Ulrich and Scofield p. 1022 |
| 1967 | Ectomaria attenuata Yochelson and Saunders p. 69 |
| 2023 | Hypergonia attenuata Wagner p. 3827 |
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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.
†Hypergonia attenuata Hall 1856
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Hall 1856 | Shell subulate, elongate; spire very gradually tapering; volutions nine or more, flattened, scarcely convex in the middle, and marked by a spiral band which is margined on either side by a strong elevated line; suture bounded on each side by a sharp elevated line which is smaller than those bordering the spiral band; aperture transverse; umbilicus none." |
Measurements
No measurements are available
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| Source: c = class | |||||
| Reference: Kiessling 2004 | |||||
Age range: Meramecian or 342.90000 to 335.40000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Meramecian | USA (Indiana) | Murchisonia attenuata (129910) |