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Aulacostrepsis simplex
Taxonomy
Coelostylina (Aulacostrepsis) simplex was named by Perner (1907). It is a 3D body fossil. Its type locality is Area between the villages of Měňany and Koněprusy, which is in a Pragian marine horizon in the Praha Formation of the Czech Republic. It is the type species of Aulacostrepsis.
It was recombined as Aulacostrepsis simplex by Knight (1941), Jhaveri (1969) and Wagner (2023).
It was recombined as Aulacostrepsis simplex by Knight (1941), Jhaveri (1969) and Wagner (2023).
Synonymy list
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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.
†Aulacostrepsis simplex Perner 1907
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. B. Knight 1941 | Rather large, high-spired, minutely phaneromphalous, manywhorled gastropods with rather low whorls, and without a slit or selenizone; whorl profile moderately arched between sutures; sutures of moderate depth; base rounded, deeply phaneromphalous, the umbilicus surrounded by a rounded ridge; nucleus unknown; columellar lip straight, angulated below, the angulation giving rise to the ridge surrounding the umbilicus; parietal lip with a thin inductura; outer lip very gently concave forward; ornamentation, other than faint, widely spaced lines of growth, wanting; shell very thin, its structure unknown; earliest whorls abandoned and closed off, but method of closing unknown. The holotype must have measured something like 60 mm. in height before breakage. Its last six whorls measure 43 mm. in height, with a width of 21 mm. and a pleural angle of 23 degrees. |