Basionym Name:Microthyriacites fimbriatus Cookson, Proc. Linn. Soc. N.S.W. 72: 210 + pl. xiii, fig. 17 (1947)
Homotypic synonyms:Phragmothyrites fimbriatus (Cookson) Selkirk, Proc. Linn. Soc. N.S.W. 100(1): 78 (1975)