Nishi, Eijiroh; Miura, Tomoyuki; Bhaud, Michel. (1999). A new species of Spiochaetopterus (Chaetopteridae: Polychaeta) from a cold-seep site off Hatsushima in Sagami Bay, central Japan. Proceedings of the Biological Society of Washington. 112(1): 210-215.

51176

Nishi, Eijiroh; Miura, Tomoyuki; Bhaud, Michel

1999

112(1): 210-215

Publication

https://www.biodiversitylibrary.org/page/34589851

AnnelidaBase

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Spiochaetopterus sagamiensis, a new species (Polychaeta: Chaetopteridae), is described from two specimens collected from a cold-seep site off Hatsushima 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, and two dorsolateral grooves on the shaft. The species has trilobed notopodia on the first segment of the median region (B1), bilobed ones on the second (B2), and entire ones on the third (B3) and on all succeeding segments. Uncinal plates of neuropodium B2 have more than 30 teeth; the upper toothed edge is smoothly curved. Anterior eyespots are absent. Spiochaetopterus sagamiensis 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.

Japan

Bathyal, Continental slope
Hydrothermal vents, Cold seeps
Systematics, Taxonomy

Annelida
Polychaeta

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