Specimen ZPAL Ga.9/83 from the Bathonian (Mid Jurassic) of Faustianka (Częstochowa region) in lateral and apical view.

Diagnoza

Protoconch 2 conical with two ribbon-like spiral keels. Shell conical with incised sutures. Teleoconch ornamented with strong prosocline axial ribs  (14 on first whorl of teleoconch) and weaker spiral ribs (about six on second whorl of teleoconch). Later in ontogeny, axial ribs getting weaker. Peristome with short anterior and weak posterior channels.

Porównanie

Very similar in shell morphology to A. conspicuus and differs only in the presence of rich pustulose ornamentation on the early part of the protoconch

Autekologia

Występowanie geograficzne

Poland and Germany.

Zasięg czasowy

Bathonian (Mid Jurassic).

Materiały muzealne

Material from Germany and Poland including 20 shells from Bathonian of Faustianka and about 20 shells from Bathonian of Gnaszyn, both Częstochowa region, Poland.

Literatura

Gründel, J. 1977. Gastropoden aus dem Dogger. V. Juvenile Exemplare. Zeitschrift  für  Geologische Wissenschaften 5,187–201.

Gründel, J. 2001. Nerithimorpha und weitere Caenogastropoda (Gastropoda) aus dem  Dogger Norddeutschlands und desnordwestlischen Polens. Berliner Geowissenschaftliche Abhandlungen, Reihe E36, 45–99.

Kaim, A. 2004. The evolution of conch ontogeny in Mesozoic open sea gastropods. Palaeontologia Polonica 62, 3–183.