Megalodicopia hians - Biological Information System for Marine Life

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., Okuyama, M., Ogawa, M., Takeuchi, A., Jing, Z., Naganuma, T. and Y. Saito (2003) Phylogenetic position of a deep-sea ascidian, Megalodicopia hians, inferred from the molecular data. Zoological Science, 20, 1243-1247.

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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 ngn sp., eine sehr merkwurdige Ascidie aus dem japanischen Meere. Annotationes Zoologicae Japonense, 9(4), 399-406.

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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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