Cyclotron Rushton, 1969

Olempska, Ewa, Maas, Andreas, Waloszek, Dieter & Eriksson, Mats E., 2019, Exceptionally well-preserved Orsten-type phosphatocopid crustaceans from the Cambrian of Poland, Acta Palaeontologica Polonica 64 (1), pp. 19-39 : 22

Genus Cyclotron Rushton, 1969

Type species: Polyphyma lapworthi Groom, 1902 ; Malvern Hills, England; Cambrian, Furonian, Olenus Biozone ( Groom 1902).

Remarks.—Phosphatocopid taxonomy was for a long time based on external shield features, such as the occurrence and location of lobes and spines, and the general outline of the shield (e.g., Maas et al. 2003). Although minute details also of the ventral appendage morphology have been described ( Müller 1979, 1982; Maas et al. 2003; Maas and Waloszek 2005; Zhang et al. 2010), such features remain unknown for most species.