Tiunova T.M.
Egg structure of some representatives of the family Palingeniidae (Insecta: Ephemeroptera)
Number: 536, Pages: 26 - 32
Egg of two East Palaearctic species, Anagenesia paradoxa Buldovsky and Chankagenesia natans Buldovsky, from the Russian Far East were studied by scanning electron microscopy. Our studies for representatives of genera Anagenesia Eaton and Chankagenesia Buldovsky, as well as literature data for genera Palingenia Burmeister, Cheirogenesia Demoulin, and Mortogenesia Lestage were analysed. It was noted that eggs of all known species of the family Palingeniidae have: 1) a lens shape, biconvex in lateral projection and oval in dorsal one; 2) thin adhesive membrane film covering the egg; 3) rough or smooth surface of the chorion; 4) micropyle characterized by funnel-shaped type. The largest sizes of eggs were noted in Mortogenesia mesopotamica (Morton) and smallest in Anagenesia paradoxa.