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Fig. 5 | BMC Evolutionary Biology

Fig. 5

From: The nervous system of the lophophore in the ctenostome Amathia gracilis provides insight into the morphology of ancestral ectoprocts and the monophyly of the lophophorates

Fig. 5

Ultrastructure of the cerebral ganglion and circum-oral nerve ring in Amathia gracilis. a Longitudinal section of the cerebral ganglion. The oral side is to the upper left corner, and the anal side is to the lower right corner. The color indicates distal (violet), central (blue), and proximal (cyan) neuropiles. b Part of the proximal neuropil of the cerebral ganglion. Arrowheads indicate the neurites of large diameters and with thick microtubules. c Part of the circum-oral nerve ring, including the perikarya and the neuropil with neurites of large diameter (arrowheads). d Part of the circum-oral nerve ring with the perikaryon (magenta) and the apical projection extending into the neuropil. Abbreviations: cc - coelomic cavity; mv - muscles of vestibulum; np - neuropil; phr - pharynx; pk - perikaryon; ppk - proximal perikarya; vw - wall of vestibulum

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BMC Ecology and Evolution

ISSN: 2730-7182

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