FIGURE 4 in Morphological distinction of the Ophioderma Müller & Troschel, 1840 species (Echinodermata: Ophiuroidea: Ophiacanthida: Ophiodermatidae) from the Algerian west coast

FIGURE 4. Dorsal disc colour of the Ophioderma species. Roman numerals refer to the description in Table 3. I: The general description olive (a) and brown (b) discs of type I. (c) olive disc with white spots, (d) degradation of dark brown to cream. III: (a) The general description of type III, (b) As dorsal disc but turns to creamy. IV: (a) The general description of type IV, (b) Cream yellow to orange disc. VIII: (a) The general description of type VIII, (b) disc with an orange pattern. CRS: Covered Radial Shield. NRS: Naked Radial Shield. Scale bare = 0.5 mm.