Synonyms: Architomocerura crassicauda (heterotypic); Macrotoma celer (heterotypic); Macrotoma ferruginosa (heterotypic); Macrotoma flavescens; Macrotoma lepida (heterotypic); Macrotoma nigra (heterotypic); Pogonognathellus arcticus; Pogonognathellus flavescens (heterotypic); Pogonognathellus flavescens arcticus; Pogonognathellus flavescens separatus; Pogonognathellus flavescens var. americanus; Pogonognathellus nigirtus; Tomocerus alba; Tomocerus americanus; Tomocerus arcticus; Tomocerus celer (heterotypic); Tomocerus elongatus; Tomocerus flavescens (heterotypic); Tomocerus flavescens var. separatus; Tomocerus lepida (heterotypic); Tomocerus niger (heterotypic); Tomocerus pallidus; Tomocerus plumbea (heterotypic)