Notes on the morphology of the early stage of the rare bramid genus Eumegistus |
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Authors: | Masato Moteki Bruce C Mundy |
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Institution: | (1) Laboratory of Ichthyology, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato, Tokyo 108-8477, Japan;(2) Pacific Islands Fisheries Science Center, NOAA, 2570 Dole Street, Honolulu, Hawaii, 96822, USA |
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Abstract: | The morphology of the early stage of Eumegistus was described from three specimens E. brevorti: 23.0 mm in standard length (SL) juvenile; E. illustris: 5.8 mm SL postflexion larva, and 40.0 mm SL juvenile] recently rediscovered in museum collections. Larval and juvenile pigmentation
patterns were reported for the first time for this genus. The 5.8 mm SL postflexion larva of E. illustris had pigmentation on the head and anterior half of the body, through to the middle of the dorsal fin base. In larvae and juveniles
of both species, the outer side of the pelvic fin was pigmented. The two juveniles possessed several spines on the lachrymal
and protruding rays in the middle of the caudal fin. Although it is known previously that the notochord flexion occurs at
5.0–6.0 mm SL in E. brevorti, the reexamined 5.0 mm SL specimen had the notochord completely flexed. Furthermore, we could not confirm whether the previously
studied 4.0 mm SL specimen was E. brevorti because it was badly damaged. |
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Keywords: | Eumegistus Bramidae Larval development Juveniles |
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