Fig 15. <i>Ophiacantha trachybactra</i> H.L. Clark, 1911, details of the paratype USNM 25694, details, 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 the vertebral condyle (streptospondylous articulation) throughout the arms. Scales bars, 0.05 mm (H), 0.1 mm (C, E, F, G, I), 0.2 mm (A, B, D, J–M).</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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