Involutina cheradospira (Loeblich and Tappan, 1950)       

Class: Spirillinata  Subclass: Spirillinana  Order: Involutinida  Family: Involutinidae
Taxon Profile

found at an  unknown  
Carbon County, Montana  Midwestern USA   North America

Geological Time: Jurassic  Middle Jurassic  Callovian

holotype

classification and image courtesy of
Smithsonian Institution National Museum of Natural History

View of a specimen of Involutina cheradospira (Loeblich and Tappan, 1950)

The classification is published in:
SINMNH Department of Paleobiology Collections Online Catalog as USNM PAL 106014
accessed 2013