Lectotype NHMNW 1853/0038/0080 a (original illustration from Laube 1867, pl. 2, fig. 1) from Mid Jurassic of Balin in ventral and lateral view.

Diagnoza

The shell is cone-shaped with slightly concave coils and sunk seams. The first recognizable sculpture consists of three strong, spiral ribs, the abapical being the most robust. The enlarged cusps of the adapical spiral rib become larger and less numerous than those of the other two. On the last coil, a much weaker one can be seen between the strong spiral ribs. Numerous weakly prosocline axial ribs run from the seam to seam. They are noticeably weaker than the three strong spiral ribs and, especially on the last coil, and are sometimes only reinforced growth lines. The base is convex. Umbilicus is narrow and the aperture is broad oval.

Porównanie

The species is imperfectly known and comparison with other species is hardly possible. Eucyclus gjeliensis Gerasimov, 1992, which is similar in sculpture, has no umbilicus.

Autekologia

Występowanie geograficzne

Only in type locality.

Zasięg czasowy

Mid Jurassic

Materiały muzealne

Only Lectotype NHMW 1853/0038/0080 a.

Literatura

Gründel, J. 2012. Neubearbeitung der von Laube 1867 beschriebenen Gastropoden fauna aus dem mittleren Jura von Balin/Polen. Annalen des Naturhistorischen Museums in Wien. Serie A, 114, 193–288.

Laube, G. C. 1867. Die Gastropoden des braunen Jura von Balin. Denkschriften der kaiserlichen Akademie der Wissenschaften, 28: 1–28.