ammonites
Hystriculina hystricula Dunbar and Condra 1932

Strophomenata - Productida - Productellidae

Alternative combinations: Marginifera histricula, Marginifera hystricula

Belongs to Hystriculina according to H. Muir-Wood and G. A. Cooper 1960

Sister taxa: Hystriculina convexa, Hystriculina dugoutensis, Hystriculina minima, Hystriculina orbignyana, Hystriculina pumila, Hystriculina sinica, Hystriculina sulcata, Hystriculina ventroplana, Hystriculina wabashensis

Average measurements (in mm): valve 8.80 x 15.21