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. 2013 Jun 4;8(6):e65074. doi: 10.1371/journal.pone.0065074

Figure 5. Morphological differences among O. vulgaris and the other octopus species.

Figure 5

A) Transversal histological section (10 µm thick) of O. vulgaris sucker stained with Picro-Ponceau. B-D) Transversal histological section (10 µm thick) of O. vulgaris sucker stained with Milligan trichrome, showing the observed morphological differences among O. vulgaris and the other octopus species. B) Rough surface (RS) of acetabular protuberance. The scale bar equals 200 µm; C) Arrangement of meridional muscles (MM) in infundibular portion. The scale bar equals 600 µm; D) Primary sphincter (SP) and secondary sphincters (SS). The scale bar equals 600 µm.