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Fig. 6 | Zoological Letters

Fig. 6

From: New insights into the morphology and evolution of the ventral pharynx and jaws in Histriobdellidae (Eunicida, Annelida)

Fig. 6

Fine structure of the ventral pharyngeal organ (VPO) of Histriobdella homari. Parasagittal section, TEM images. a. Ultrastructure of the ventral carrier retractor. Arrows indicate the position of mitochondria. b. Fine structure of the dorsal rod. c. Structure of the posterior zone of the median invagination. Arrows indicate very thin pharyngeal epithelial cells. dr, dorsal rod; drf, dorsal rod flexor; mi, median VPO invagination; sh, mandibular shaft; vcr, ventral carrier retractor

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