Fig 23. Adult and juvenile characters of <i>Ophiacantha trachybactra</i> H.L. Clark, 1911 and <i>Ophiophthalmus normani</i> (Lyman, 1879) (family Ophiacanthidae).
<dl><dd>A, C, E, <i>Ophiacantha trachybactra</i>. A, adult specimen, 9 mm disk diameter, dorsal view (NSMT E–7557); C, oral frame of adult specimen 9 mm disk diameter, distal oral papilla is completely detached from the adoral shield (NSMT E–7557), SEM; E, oral frame of juvenile specimen, 1.7 mm disk diameter, distal papilla is semi-detached from the adoral shield (NSMT E–7533), SEM; B, D, F, <i>Ophiophthalmus normani</i>. B, adult specimen, 10 mm disk diameter (NSMT E–2610); D, oral frame of the same specimen, distal oral papilla is completely detached from the adoral shield, SEM; F, oral frame of juvenile specimen 2 mm disk diameter, distal papilla is the adoral shield spine (ORI KT 90–08), SEM. ap, adoral shield papillae; as, adoral shields; dp, dental plate; gs, genital slit; j, jaws; op, oral papillae; os, oral shield; th, teeth; red asterisks indicate absence of the adoral shield papillae. Scales bars, 0.1 mm (E, F), 0.5 mm (C, D), 4 mm (A), 5 mm (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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