Classification :
Eukarya - Opisthokonta - Animalia - Annelida - Polychaeta - Sabellida - Siboglinidae - Osedax
Osedax japonicus Fujikura, Fujiwara & Kawato, 2006
Occurrence records
Record to be downloaded also includes record registered by synonym.
Occurrence records
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[Map・Summary]
■ Record acquisition rangeWith latitude and longitude information:100%
Latitude
31.308580 ~ 31.397730
Longitude
129.977880 ~ 129.993530
Depth
218.200 ~ 254.300 m
■ Record acquisition periodWith period:100%
2004/07/28 ~ 2012/04/13
* Date last modified:2019/08/13
■ Number of record100  
[Environment data]
Depth
Temperature
With reanalysis temperature data (FROM FORA)
Salinity
With reanalysis salinity data (FROM FORA)
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Video・Image
  • Photo by Y. Fujiwara
JAMSTEC E-library of Deep-sea Images Video (23)・Image(24)
Over view
General
Polychaete worms belonging to the genus Osedax are known to occur on decomposing whale carcasses on sea floors. The body is composed of root structures running within the matrix of the bone substratum, elongated trunk and palps emergent from upper part of trunk. Osedax species lack digestive tract both in larvae and adults, and live on nutrition provided by symbiotic bacteria housed in the roots. Osedax japonicus is the first species of the genus from western Pacific, and was recorded from the carcasses of sperm whales deposited at the depths of 224-250 m off Cape Nomamisaki, southwestern tip of Kyushu Island, Japan (Fujikura et al., 2006; Fujiwara et al., 2007). Palps are 1.0-7.0 mm in length and the cylindrical trunk attains approximately 9 mm in length. The species has the oviduct terminating at the end of the trunk against congeners with long oviduct projecting between palps.
Osedax japonicus Fujikura, Fujiwara & Kawato, 2006 of literature
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Fujikura, K., Fujiwara, Y. and M. Kawato (2006) A new species of Osedax (Annelida: Siboglinidae) associated with whale carcasses off Kyushu, Japan. Zoological Science, 23, 733-740.
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Fujikura, K., Okutani, T. and T. Maruyama (2012) Deep-sea life —Biological observations using research submersibles: Second Edition. Tokai University Press, Kanagawa, Japan, 487 pp. (in Japanese).
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Fujiwara, Y., Kawato, M., Yamamoto, Y., Yamanaka, T., Sato-Okoshi, W., Noda, C., Tsuchida, S., Komai, T., Cubelio, S. S., Sasaki, T., Jacobsen, K., Kubokawa, K., Fujikura and 8 authors (2007) Three-year investigations into sperm whale-fall ecosystems in Japan. Marine Ecology 28: 219-232.
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