Kjaerina typa was named by Bancroft (1929) [Lectotype, BB 14383, a ventral internal mould, selected by Cocks (1978, p. 113) and reillustrated by Cocks and Rong (2000, fig. 149.1b) and here (Pl. 4, fig. 13),]. Its type specimen is BB 14383, a valve (ventral internal mould), and it is a 3D body fossil.