Figure 7
Glandular structures in opisthobranch species. A Elysia crispata (Moerch, 1863) (Sacoglossa), subepithelial glandular cells in dorsal epithelium. B Plakobranchus ocellatus van Hasselt, 1824 (Sacoglossa), mantle dermal formation in the edge of the parapodia. C Berthellina citrina (Rüppell & Leuckart, 1828) (Pleurobranchoidea), median buccal gland in visceral cavity, producing sulphuric acid. D Berthella edwardsi (Vayssiére, 1896) (Pleurobranchoidea), acid glands lying in the notum tissue. E Thecacera pennigera (Montagu, 1815) (Nudibranchia, Anthobranchia), subepithelial glandular cells in dorsal epithelium. F Marionia blainvillea (Risso, 1818) (Nudibranchia, Dexiarchia, Dendronotoidea), epithelial glandular cells with unusual large vacuoles filled with homogenously stained contents. G Risbecia tryoni (Garrett, 1873) (Nudibranchia, Anthobranchia), mantle dermal formations (MDFs) along the posterior mantle rim.