A new species of Spiochaetopterus (Chaetopteridae : Polychaeta) from a cold-seep site off Hatsushima in Sagami Bay, central Japan

Citation
E. Nishi et al., A new species of Spiochaetopterus (Chaetopteridae : Polychaeta) from a cold-seep site off Hatsushima in Sagami Bay, central Japan, P BIOL SOC, 112(1), 1999, pp. 210-215
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Biology
Journal title
PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON
ISSN journal
0006-324X → ACNP
Volume
112
Issue
1
Year of publication
1999
Pages
210 - 215
Database
ISI
SICI code
0006-324X(19990323)112:1<210:ANSOS(>2.0.ZU;2-6
Abstract
Spiochaetopterus sagamiensis, a new species (Polychaeta: Chaetopteridae), i s described from two specimens collected from a cold-seep site off Hatsushi ma in Sagami Bay, central Pacific side of Japan. In this species, the large chaetae on chaetiger 4 (A4) are distinctive in having a triangular profile of the head, a nearly straight ventral edge of the inflated distal part, a nd two dorsolateral grooves on the shaft. The species has trilobed notopodi a on the first segment of the median region (B1), bilobed ones on the secon d (B2), and entire ones on the third (B3) and on all succeeding segments. U ncinal plates of neuropodium B2 have more than 30 teeth; the upper toothed edge is smoothly curved. Anterior eyespots are absent. Spiochaetopterus sag amiensis occurs in deep water (800-1100 m depth) and is the first member of this family to be recorded in a deep-sea chemosynthetic community.