Diagnoza

Protoconch slightly set off teleoconch, ornamented by pattern of  oblique, prosocline, opisthocline, spiral threads. Teleoconch ornamented with strong, prosocline axial ribs and much weaker spiral ribs.

Porównanie

Similar to Plocezyga turbinata Hoare & Sturgeon, 1980 but differs in having more inflated whorls  of the teleoconch and a partially reticulate pattern of the protoconch. The latter is similar to the protoconch ornament of Hemizyga decussata Yoo, 1988 but the Hemizyga teleoconch is ornamented exclusively by weak axial ribs.

Autekologia

Występowanie geograficzne

Only in type locality

Zasięg czasowy

Morrisiceras morrisi Zone, Bathonian (Mid Jurassic).

Materiały muzealne

ZPAL: Three shells.

Literatura

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