Gastropoda - Cephalaspidea - Retusidae

Alternative combination: Volvulella micratracta

Full reference: A. P. Brown and H. A. Pilsbry. 1913. Fauna of the Gatun Formation, Isthmus of Panama: II. Proceedings of the Academy of Natural Sciences of Philadelphia 64:500-519

Belongs to Volvulella (Volvulella) according to W. P. Woodring 1970

Sister taxa: Volvulella (Volvulella) cylindrica, Volvulella (Volvulella) oxytata, Volvulella (Volvulella) phonicoides

Type specimen: ANSP (no number), a shell

Average measurements (in mm): shell 1.50 x 0.70