Name: Andvakia boninensis
Reference: Daly M. and Goodwill R. H., 2009, Page 266 , fig. 1
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Caption: "Anatomy and histology of *Andvakia boninensis* Carlgren, 1943. A. Partially expanded living specimen. Note large mouth atop hypostome. B. Longitudinal section through distal column, showing mesogleal marginal sphincter muscle. Scale bar = 150 µm. C. Columnar tenaculum. The epidermis has been damaged by the removal of adherent material. Scale bar = 25 µm. D. External anatomy, partially expanded preserved specimen. Scale bar = 10 mm. E. Cross section through perfect mesentery showing parietal muscle. Scale bar = 25 µm. F. Cross section through perfect mesentery showing retractor muscle. Scale bar = 100 µm. G. Cross section through column at proximal end of actinopharynx, showing perfect and imperfect mesenteries. Scale bar = 150 µm. H. Longitudinal section through oral crown showing musculature of oral disk (OD) and a longitudinal section through a tentacle (Te). Scale bar = 150 µm. I. Longitudinal section through proximal column, showing junction of mesentery and base. Note absence of musculature. Scale bar = 25 µm. J. Cross section through column below actinopharynx, showing perfect (Ma) and imperfect (Mi) mesenteries. Retractor muscles (Ret) are on perfect mesenteries only; parietal muscles are not visible at this magnification. Although much of the epidermis has sloughed off, mesoglea of tenaculum (Ten) remains visible. Scale bar = 250 µm." Permission to display granted by copyright holder.