1976] 
Kukalova-Peck and Peck — Calvertiellidae 
93 
1971. Morphological features and the way of life of Palaeodictyoptera. Dokl. 
24, tschtenii pam. N.A. Cholodkowskogo. Akad. Nauk SSSR. Moscow: 
49-63. 
Tillyard, R. J. 
1925. Kansas Permian Insects. Part 5. The orders Protodonata and Odonata. 
Amer. Jr. Sci. 10: 41-73. 
WOOTTON, R. J. 
1972. Nymphs of Palaeodictyoptera (Insecta) from the Westphalian of England. 
Palaeontology 15: 662-675. 
