HESIONIDAE (ANNELIDA, POLICHAETA) FROM JAPAN. I. by Hiro ...
HESIONIDAE (ANNELIDA, POLICHAETA) FROM JAPAN. I. by Hiro ...
HESIONIDAE (ANNELIDA, POLICHAETA) FROM JAPAN. I. by Hiro ...
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40 Kuroshio Biosphere : BULL. BIOL. INST. KUROSHIO Vol. 1, 2004<br />
D). Notopodial cirrostyles rather short. Each notopodium with a single aciculum. The tip of<br />
aciculum approached to the surface of the cirrophore near the constriction. Without<br />
notosetae. Each median neuropodium with a single aciculum. Neuropodial presetal lobe<br />
with a long triangular projection (Fig. 4, C-D). Neuropodial postsetal lobe low and<br />
rounded and not conspicuous (Fig. 4, D). With ca. 16 supla-acicular and ca. 18<br />
sub-acicular setae in median neuropodia. Neurocirri long subulate in form, inserted from<br />
somewhat to the ventro-lateral corner of parapodia (Fig. 4, C-D).<br />
Neuroseta with rather long terminal piece of narrow blade (Fig. 4, F-J). Serration of<br />
blade very fine and almost smooth. Superior sub-acicular setae with long blade (Fig. 4, D,<br />
J).<br />
REMARKS.<br />
The elliptical prostomium, rather large eyes, rather long notopodial cirrophore, with<br />
gradually reduced constriction, rather short notopodial cirrostyle, long neuropodial presetal<br />
lobe, and insertion of neurocirrus far apart from the latero-ventral corner of the<br />
neuropodium, are all resemble to the figures of original description (Grube, 1878, Taf. VI,<br />
figs. 7, 7a, Taf. XV, fig. 12). The locality of the present material, furthermore, is the<br />
Yaeyama, southern-most part of Japan, and true coral reef region, and closely near the type<br />
Fig. 4. Ophiodromus angustifrons<br />
A, anterior part, dorsal view (scale <strong>by</strong> A: 1 mm); B, prostomium; C, right 15th parapodium, anterior view; D,<br />
right 20th parapodium, posterior view; E, notopodial aciculum; F, median supla-acicular neuropodial falciger in<br />
right 15th parapodium; G, inferior-most supla-acicular falciger in the same parapodium; H, inferior-most<br />
sub-acicular falciger in the same parapodium; I, inferior sub-acicula falciger; J, superior sub-acicular falciger.<br />
Scale <strong>by</strong> D, B-C: 500 µm, D and F-H: 200 µm, E and I-J: 50 µm.