Genus

Thoronetia Brönniman, Caron et Zaninetti, 1972

Taxon description

Knaust, 2020c

Diagnosis (revised after Blau et al. 1997). Favreinidae with a circular to sub-circular outline in cross-section, a ventral cap, and internal canals circular, sub-circular, tearshaped or combinations in cross-section.