Fig 13. <i>Ophiacantha clypeata</i> Kyte, 1977 (new synonym of <i>O. trachybactra</i> H.L. Clark, 1911), details of the paratype USNM 26698, middle segments, SEM.
<dl><dd>A, lateral arm plate; B, same, inside view; C, ventral arm plate; D, dorsal spine; E, arm spine articulations; F, spine, ventral view; G, dorsal spine, transversely sectioned at the base showing a single large cavity; H, dorsal spine, transversely sectioned in the middle showing several small cavities; I, ventral spine; J, vertebra, dorsal view; K, same, ventral view; L, same, distal view; M, same, proximal view. Red asterisk indicates the absence of vertebral condyle (streptospondylous articulation) throughout the arms. Scales bars, 0.05 mm (G), 0.1 mm (E, F, I–M), 0.2 mm (A–D).</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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