FIGURE 6 in A comprehensive taxonomic list of brittle stars (Echinodermata: Ophiuroidea) from submarine caves of the Ryukyu Islands, southwestern Japan, with a description of a rare species, Dougaloplus echinatus (Amphiuridae)

FIGURE 6. Dougaloplus echinatus (Ljungman, 1867) (RUMF-ZE-02040). SEM images of ossicles. A, B, dorsal arm plates, external views, from proximal (A) and distal portion of arm (B); C, D, ventral arm plates, external views from proximal (C) and distal portion of arm (D). E–H, lateral arm plates, from proximal portion of arms, inner view (E), external view (F), distal view (G) and, arm spine articulations (H); I–K, lateral arm plates, from distal portion of arm, inner view (I), external view (J) and distal view (K); L, M, arm spines from proximal portion of arm, middle (L) and aboral most (M); N, arm spine from distal portion of arm. Orientations: ab, aboral side; dis, distal side; o, oral side; pro, proximal side. Abbreviations: DL, dorsal lobe; E, elevated structure; P, perforation; VL, ventral lobe.