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Hannatoma gesteri
Taxonomy
Melanatria gesteri was named by Hanna and Israelsky (1925). Its type specimen is CAS 1712, a shell, and it is a 3D body fossil. Its type locality is CAS Loc. 334, Punto Sal Chico [Negritos Fm], which is in an Eocene marine shale in the Negritos Formation of Peru.
It was recombined as Hannatoma gesteri by Olsson (1931).
It was recombined as Hannatoma gesteri by Olsson (1931).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1925 | Melanatria gesteri Hanna and Israelsky p. 42 figs. pl. 8, figs. 1-3 |
| 1931 | Hannatoma gesteri Olsson p. 80 figs. Plate 16, Figs. 2, 7 |
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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.
†Hannatoma gesteri Hanna and Israelsky 1925
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. D. Hanna and M. C. Israelsky 1925 | Shell, robust, spire turreted, composed of eight post-nuclear whorls; sutures deeply impressed, bordered above and below by an irregular, rounded, spiral, ridge; body whorl with these two ridges and three smaller ones below ; the uppermost of the three shows above the suture on the penultimate whorl ; columella twisted, and apparently heavily calloused in full-grown specimens; these (No. 1712, C.A.S. coll.) have a decided anal
sulcus in the upper angle of the aperture; peristome thin; canal of moderate length only. |
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Kiessling 2004, Hendy et al. 2009 | |||||
Age range: base of the Early/Lower Eocene to the top of the Late/Upper Oligocene or 56.00000 to 23.04000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Eocene | Peru | Melanatria gesteri (type locality: 93745) | |
| Early/Lower Oligocene | Peru (Piura) | Hannatoma gesteri (55433) | |
| Late/Upper Oligocene | Peru | Hannatoma gesteri (42794) |