Fig 17. <i>Ophiacantha trachybactra</i> H.L. Clark, 1911, adult specimen 10.9 mm disk diameter NSMT E–7557, sta. KT-93-15 (M 3), off Sanriku, northern Honshū, details, SEM.
<dl><dd>A–N, proximal segments. 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, ventral spine sectioned in the middle showing small cavities; K, vertebra, dorsal view; L, same, ventral view; M, same, distal view; N, same, proximal view; O–T, middle segments. O–P, lateral arm plates showing no additional protuberance; Q, arm spine articulations; R, vertebra, dorsal view; S, same, distal view; T, ventral arm plate. Red asterisks indicate the absence of the vertebral condyle (streptospondylous articulation) throughout arms. Scales bars, 0.05 mm (F), 0.1 mm (C, E, G, H, I, J, Q, T), 0.2 mm (A, B, K, L, M, N, O, P, R, S), 0.5 mm (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.
CC BY 4.0
<a rel="nofollow" class="external free" href="https://dx.doi.org/10.1371%2Fjournal.pone.0139463">https://dx.doi.org/10.1371%2Fjournal.pone.0139463</a>