HESIONIDAE (ANNELIDA, POLICHAETA) FROM JAPAN. I. by Hiro ...

62 Kuroshio Biosphere : BULL. BIOL. INST. KUROSHIO Vol. 1, 2004
aciculum tip beginning from 3rd-5th setiger (Fig. 12, C-D, Fig. 13, A). Each median
neuropodium with a single or two acicula (Fig. 12, D, Fig. 13, B-C). Neuropodial presetal
lobe as triangular sheet of parapodial full width (Fig. 12, C-D, Fig. 13, A, C). The distal
part of the presetal lobe rather narrow, and with dully pointed apex. Neuropodial postsetal
lobe formed a wide triangular edge (Fig. 12, D, Fig. 13, A). With ca. 20 supla-acicular and
ca. 30 sub-acicular setae in median neuropodia. Neurocirri long subulate, inserted near the
ventro-lateral corner (Fig. 12, C-D, Fig. 13, A).
Notosetae forked form with sub-apical spine less than a half length of apical spine,
and rather wide blade with long serrated zone (Fig. 13, D). Neurosetae with normal form
of the genus (Fig. 13, E-H). Tip of shaft of compound setae simple pointed (Fig. 13, I).
REMARKS.
O. parapallidus, n. sp. is characterized by notopodial cirrophores of medium length,
with a constriction on cirrophore, situated rather proximally, and the diameter never
reduced on distal part from the constriction. The form of presetal lobe, and a reasonable
numbers of notosetae are also specific characters of the new species. O. parapallidus, n sp.
allied to O. pallidus (Claparède, 1864) especially on the detailed description by Pruvot and
Racovitza (1895). The exact figures of parapodia by Zunarelli-Vandini (1971) show the
species with no remarkable constriction on notopodial cirrophore. Furthermore, notosetae of
each bundle is one to three in the Atlantic species, and our new species with ca. 4
notosetae in each bundle. O. parapallidus, n sp. allied to O. brevipodus, n sp., but the latter
with stout parapodia and rounded short post-setal lobes. O. parapallidus, n sp. also allied to
O. agilis (Ehlers, 1864), but the Mediterranean species with only a single notoseta in each
parapodium, and the notoseta is recognized as simple capillary.
ETYMOLOGY.
Named from the allied species O. pallidus (Claparède, 1864).
Ophiodromus pugettensis (Johnson, 1901)
(Fig. 14)
Podarke pugettensis Johnson, 1901, p. 397, Pl. 3, figs. 23-25.
─── ────, Berkeley and Berkeley, 1948, p. 56, Figs. 83-84.
─── ────, Uschakov, 1955, p. 198, Fig. 59 (figs. after Johnson, 1901).
? ─── ────, Bailey-Brock and Hartman, 1987, p. 264, Fig. 3.II.35, a-c
(figs. after Johnson, 1901).
? Ophiodromus pugettensis, Hessle, 1925, p. 20.
───── ────, Uchida and Ui, 1994, p. 31.
───── ────, Uchida and Ui, 1995, p. 38.
Podarke furcata Hartmann-Schröder, 1962b, 116, Taf. 5, Abb. 27-29.
non Podarke pugettensis, Moore, 1909, p. 336.
nec ─── ─────, Okuda, 1936, p. 413, Fig. 4. (= O. okudai, n. sp.)
MATERIAL EXAMINED.
Akou, Maruyama, intertidal zone, Hyogo Prefecture, April, 27, 1990, 2 specimens;
Kushimoto, Oshima, Myougajima Islet, 4m, May, 5, 1991, SCUBA diving, F. Iwase,