Chondrophellia orangina internal anatomy

A, cross-section of the mesenteries below actinopharynx, showing diffuse retractor muscles and abundant ova;

B, cross-section of the mesenteries below actinopharynx, showing parietobasilar muscles;

C, longitudinal section through distal column, showing mesogleal marginal sphincter (arrows);

D, detail of the marginal sphincter muscles fibres embedded in the mesoglea;

E, cross-section through a tentacle showing longitudinal ectodermal muscles;

F, cross-section of the pedal disc showing basilar muscles (arrows).

Scale bars: A, 1 mm; B, 0.2 mm; C, 4 mm; D, E, 0.1 mm; F, 0.2 mm

Photographer: From Zelnio et al. (2009). Publisher: Allen, Chris.