Fig 22. Adult and juvenile characters of <i>Ophiacantha rhachophora</i> H.L. Clark, 1911 and <i>Ophiacantha kokusai</i> sp.nov. (family Ophiacanthidae).
<dl><dd>A, C, E, Ophiacantha rhachophora. A, adult specimen, 4.5 mm disk diameter, dorsal view (NSMT E–7609); C, oral frame of adult specimen 4.6 mm disk diameter, lobed distal oral papilla is completely migrated from the adoral shield to the jaws (NSMT E–875), SEM; E, oral frame of early postlarval specimen, 0.9 mm disk diameter, distal papilla is thorny and attached to the adoral shield (NSMT E–7642), SEM; B, D, F, Ophiacantha kokusai sp. nov. B, adult specimen, 4 mm disk diameter (NSMT E–7641); D, oral frame of adult specimen, 4.2 mm disk diameter, thorny distal “oral” papilla is the adoral shield papilla and is attached to the adoral shield (NSMT E–7589), SEM; F, oral frame of early postlarval specimen, 0.5 mm disk diameter, distal papilla is thorny and attached to the adoral shield (NSMT E–7607), SEM. ap, adoral shield papillae; as, adoral shields; dp, dental plate; j, jaws; op, oral papillae; os, oral shield; th, teeth; red asterisks indicate absence of the adoral shield papillae in adult O. rhachophora. Scales bars, 0.1 mm (F, E), 0.2 mm (D), 0.5 mm (C), 2 mm (A, B).</dd></dl>
Martynov, A., Ishida, Y., Irimura, S., Tajiri, R., O’Hara, T.D., Fujita, T. 2015. When Ontogeny Matters: A New Japanese Species of Brittle Star Illustrates the Importance of Considering both Adult and Juvenile Characters in Taxonomic Practice. PLoS ONE. 10(10): e0139463.
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