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Prososthenia undocostata
Taxonomy
Prososthenia undocostata was named by Neubauer et al. (2013). Its type specimen is NHMW 2011 ⁄ 0138 ⁄ 0123, a shell, and it is a 3D body fossil. Its type locality is Debris collection (unit 3), NW slope of Fatelj hill, which is in a Langhian lacustrine limestone in Bosnia and Herzegovina.
Synonymy list
| Year | Name and author |
|---|---|
| 2013 | Prososthenia undocostata Neubauer et al. p. 143 figs. 8A–B, F, H |
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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.
†Prososthenia undocostata Neubauer et al. 2013
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| T. A. Neubauer et al. 2013 | Conical shell with weak axial ribs and distinctly thickened ovoid aperture.
Conical shell with 6 weakly convex whorls. Maximum dimensions range around 5.5 mm in height and 2.5 mm in width. The protoconch measures about 300 lm and consists of about one high trochiform whorl. It displays a granular sculpture and a continuous transition into the teleoconch. Early teleoconch whorls are smooth except for weak growth lines. The last few whorls exhibit weak axial ribs, which form slight convexities at the upper suture. This results in the eponymous undulated pattern. The last whorl encompasses somewhat more than 50 per cent and forms a convex base. The ribs are strongest in its adapical part and tend to fade out towards the base. The aperture is ovoid and notably thickened, especially in its posterior part. No umbilicus is developed. In lateral view, a weak posterior emargination occurs on the outer lip. |
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Kiessling 2004, Bush and Bambach 2015 | |||||