Diagnoza

Shell cone-shaped, 1.76 times as high as broad. Protoconch weakly medioaxial, smooth. Teleoconch starting with two spiral ribs. Adapical rib becoming keel on first teleoconch whorl. Some remnants of spiral microornamentation present, otherwise teleoconch smooth.

Porównanie

Has the most reduced ornamentation among the known gymnothildids. It also differs from other gymno- and carinathildids in developing the keel from the adapical spiral rib, not from the abapical one.

Autekologia

Występowanie geograficzne

Only in type locality.

Zasięg czasowy

Saynoceras verrucosum Zone, Late Valanginian (Early Cretaceous).

Materiały muzealne

ZPAL: 17 shells.

Literatura

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