Turrilites has three subgenera. •
Turrilites (Turrilites) Lamarck, 1801 •
Turrilites (Turrilites) acutus Passy, 1832 •
Turrilites (Turrilites) costatus Lamarck, 1801 •
Turrilites (Turrilites) scheuchzerianus Bosc, 1801 •
Turrilites (Euturrilites) Breistroffer, 1953 •
Turrilites (Mesoturrilites) Subgenus
Turrilites has weak ribs and strong tubercles. Subgenus
Euturrilites has strong ribs, commonly depressed in middle, especially on early whorls, and no tubercles. Subgenus
Mesoturrilites has almost no ribs and clavate tubercles that tend to form spiral ridges. == References ==