Holotype ZPAL Ga.9/259 from the Valanginian (Early Cretaceous) of Wąwał in lateral and apical view.

Diagnoza

Broadly cone-shaped shell, 1.30 times as high as broad. Protoconch almost  coaxial, smooth. Teleoconch starting with four spiral ribs. Medial rib becoming keel on first teleoconch whorl. Other ribs lost. Spiral ribs crossed by weakly opisthocyrtic axial ribs (about 60 ribs per whorl), poorly developed in latest known part of shell. Remnants of axial ribs present on keel surface. Surface of teleoconch covered by spiral microornamentation.

Porównanie

E. krawczynskii differs from the other species of Erratothilda in the reduction of ornamentation similar to that observed among the species of Gymnothilda.

Autekologia

Występowanie geograficzne

Only in type locality.

Zasięg czasowy

Sample M1, Tirnovella pertransiens Zone, Early Valanginian (Early Cretaceous).

Materiały muzealne

ZPAL: one shell

Literatura

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