A preliminary report of egg chorion features in dragonflies (Anisoptera)
Odonatologica , Volume 17 - Issue 4 p. 393- 399
Scanning electron microscopy was used to examine surface chorionic features in selected odon. spp. Aphylla williamsoni (Gloyd) and Gomphus exilis Sel. (Gomphidae) have thick-shelled, elaborately sculptured eggs which exhibit multiple micropyles on a micropylar stalk. Several libellulid spp. display simply sculptured, thin-shelled eggs which have an apical disc surmounted by an extrachorionic nippledike structure. Anax junius (Dru.) (Aeshnidae) eggs are elongate, smooth, and have an apical whorl of 6 micropyles surrounding a short stalk.
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