Classification :
Eukarya - Opisthokonta - Animalia - Chordata - Urochordata - Ascidiacea - Enterogona - Phlebobranchia - Octacnemidae - Megalodicopia
Megalodicopia hians Oka, 1918
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Taxonomy
Occurrence records
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Occurrence records
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[Map・Summary]
■ Record acquisition rangeWith latitude and longitude information：100%
Latitude
36.881900 ~ 37.453000
Longitude
137.136000 ~ 138.014600
Depth
575.300 ~ 979.000 m
■ Record acquisition periodWith period：100%
2000/08/13 ~ 2013/07/30
* Date last modified：2025/03/28
■ Number of record58 　
■ Dataset2 　
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[Environment data]
Video・Image
JAMSTEC E-library of Deep-sea Images　Video (27)・Image(11)
Over viewLast updated2013/06/06
General
Megalodicopia hians is a solitary ascidian inhabiting the bathyal/ abyssal zone. The body with a long peduncle is translucent and looks like a ripe pomegranate. The oral aperture is large and has huge anterior and posterior lobes. On the other hand, the atrial siphon opening at the antero-dorsal edge of the body is small. This ascidian is attached on a rock bed with the posterior end of the peduncle, and often facing the wide-opened oral aperture to the counter-direction to currents. It has been suggested that M. hians catches relatively large materials drifting in the water currents and engulf them without distinction.
Megalodicopia hians Oka, 1918 of literature
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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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Kurabayashi, A., M. Okuyama, M. Ogawa, A. Takeuchi, Z. Jing, T. Naganuma and Y. Saito (2003) Phylogenetic position of a deep-sea ascidian, Megalodicopia hians, inferred from the molecular data. Zoological Science, 20(10), 1243-1247, doi: http://dx.doi.org/10.2108/zsj.20.1243.
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Nishikawa, T. (1995) Chordata. In: Nishimura, S. (ed.), Guide to Seashore Animals of Japan with Color Pictures and Keys, vol. II. Hoikusha, Osaka, 573-610 (in Japanese).
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Oka, A. (1918) Megalodicopia hians n. g. n. sp., eine sehr merkwürdige Ascidie aus dem Japanischen Meere. Annotationes Zoologicae Japonenses, 9(4), 399-406 (in German).
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Okuyama, M., Saito, Y., Ogawa, M., Takeuchi, A., Jing, Z., Naganuma, T. and E. Hirose (2002) Morphological studies on the bathyal ascidian, Megalodicopia hians Oka 1918 (Octacnemidae, Phlebobranchia), with remarks on feeding and tunic morphology. Zoological Science, 19, 1181-1189.
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