Fig 11. <i>Ophiacantha rhachophora</i> H.L. Clark, 1911, NSMT E–7614 from Sagami Bay, 4.5 mm dd, external views and details, SEM.
<dl><dd>A, dorsal view; B, ventral view; C,D, lobed, not thorny, distalmost oral papilla placed on the jaw instead of adoral shield; E, F, dental plates; G, third lateral arm plate (first free proximal segment) closely adjacent to the disk showing no striated elevation near articulations; H, arm spine articulations; I, proximal vertebra, dorsal view; J, middle vertebra, dorsal view; K, proximal vertebra, distal view. as, adoral shields; op, oral papillae; gs, genital slit; j, jaws; op, oral papillae; os, oral shield; red asterisk indicates the absence of the vertebral condyle (streptospondylous articulation) on proximal vertebrae. Scales bars, 0.1 mm (C, D, G–K); 0.2 mm (E, F), 1 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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