Fig 19 in Biodiversity and Biogeography of Chthamalid Barnacles from the North-Eastern Pacific (Crustacea Cirripedia)

Fig 19. Chthamalus panamensis from Avenida Amador, Naos Island, Panama. Light micrographs. A, B, cirrus I. B, detail showing the absence of a bidenticulate seta on the anterior ramus. C, D, cirrus II. D, showing the bidenticulate setae with basal guards, in the insert, and the presence of bidenticulate setae with basal guards on the first segment of anterior and posterior rami. E, cirrus III: note the difference in lengths of the two rami. F, cirrus IV. G, cirrus V. H, cirrus VI. Intermediate segments of anterior rami of cirri III-VI are shown as inserts in E-H. Scale bars in μm. doi:10.1371/journal.pone.0149556.g019