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

50 Kuroshio Biosphere : BULL. BIOL. INST. KUROSHIO Vol. 1, 2004
rounded (Fig. 8, C-F). With ca. 20 supla-acicular and ca. 25 sub-acicular setae in median
neuropodia. Neurocirri long subulate, inserted ventro-lateral corner of parapodia (Fig. 8, C-
F).
Neurosetae in usual form (Fig. 8, G-K). Serration of blade very fine and almost
overlooked, except for the setae in superior-most supra-acicula or inferior-most subacicular
portions (Fig. 8, G). Inferior-most 2 supla-acicular setae with long and narrow
blade (Fig. 8, I). Distal part of shaft of compound seta with an inconspicuous undulation
on its inside surface (Fig. 8, G-K).
REMARKS.
O. constrictus, n. sp. closely related to O. angustifrons, but can be easily separated
from the latter by the strong constriction on notopodial cirrophores, together with the
insertion site of neuropodial cirri. Furthermore, O. constrictus, n. sp. with neurosetae of
rather short blade, and without long blade neurosetae in sub-acicular position, but O.
angustifrons is a species with long neurosetal blades, and also with long-blade setae in
sub-acicular position. O. constrictus, n. sp. is somewhat similar to O. berrisfordi, but the
new species with long notocirri with articulations.
Ophiodromus fauveli, sp. nov.
(Fig. 9, Pl. 1, fig. 5)
Podarke angustifrons, Fauvel, 1918, p. 333. (not Grube, 1878)
─── ─────, Fauvel, 1919, p.371. (not Grube, 1878)
─── ─────, Fauvel, 1932, p.63, Text-fig. 11. (not Grube, 1878)
─── ─────, Fauvel, 1953, p.109, Fig. 52. (not Grube, 1878)
Ophiodromus angustifrons, Uchida, 1988, p.78. (not Grube, 1878)
───── ─────, Uchida, 1992, p.321, pl. 63, Fig. 7. (not Grube, 1878)
MATERIAL EXAMINED.
Holotype: Kushimoto, Izumo, Wakayama Prefecture, Oct. 26, 1976, lobster gill-net,
H. Misaki, collector.
Paratypes: Kushimoto, Arita, Nov. 30, 1976, lobster gill-net, H. Misaki, collector, 1
specimen; the same locality, Dec. 1, 1976, the same method, H. Misaki & M. Suzuki,
collector, 1 specimen; Kushimoto, Shionomisaki, Naminoura, Dec. 17, 1976, the same
method, H. Misaki, collector, 1 specimen; Kushimoto, Shionomisaki, Shobadani, Mar. 16,
1985, the same method, K. Nomura, collector, 1 specimen; Kushimoto, Sabiura, Aquarium
tank, April, 9, 1985, 1 specimen; the same locality, April, 18, 1985, 1 specimen;
Kushimoto, Shionomisaki, Oct. 31, 1989, lobster gill-net, K. Nomura, collector, 1
specimen; the same locality, Feb. 11, 1991, the same method, the same collector, 1
specimen; Minabe, Sakai, Wakayama Prefecture, Jan. 11, 1992, lobster gill-net, F. Iwase,
collector, 1 specimen; the same locality, Feb. 14, 1992, the same method, the same
collector, 3 specimens; Kushimoto, off Arita, 20m, SCUBA diving, Mar. 13, 1992, K.
Nomura, collector, 2 specimens.
Other materials: Nachikatsuura, Uragami Bay, Wakayama Prefecture, Sep. 15, 1980,
Wakayama Prefectural Fisheries Laboratory, collector, 10 specimens; Kushimoto, off