Schrader, F. 1931 The chromosome cycle of Protortonia primitiva (Coccidae) and a consideration of the meiotic division apparatus in the male.. Zeitschrift für Wissenschaftliche Zoologie 138: 386-408.
Schrader, F. 1931 The chromosome cycle of Protortonia primitiva (Coccidae) and a consideration of the meiotic division apparatus in the male.. Zeitschrift für Wissenschaftliche Zoologie 138: 386-408.