FIGURE 4 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 4. Dougaloplus echinatus (Ljungman 1867) (RUMF-ZE-02040), disc cast off. A, aboral disc; B, aboral periphery of the disc; C, aboral central disc; D, aboral region, lacking disc integment; E, oral disc and proximal portion of arms; F, interradial oral disc. Abbreviations: ASH, adoral shield; IP, infradental papillae; OS, oral shield; P, oral papillae; T, tooth.