Alderia modesta from eastern Russia

March 22, 2005
From: A. V. Chernyshev, E. M. Chaban

Dear Bill,
Alderia modesta (Loven, 1844) is the fourth sacoglossan species reported from the north-west part of Sea of Japan. It was found upon Vaucheria algal mats in the semi-enclosed reservoir of the Amurskiy Bay (Peter the Great Bay, Sea of Japan) in 2003 and 2004 (Chernyshev & Chaban, 2005). The adult specimens are up to 14 mm long. In late May and early June the density of A. modesta varied from 10-20 to 1000-2000/m2. The numerous egg masses hatch planktotrophic veligers. From July to April both A. modesta and Vaucheria sp. are absent. It is the second finding of A. modesta in the Asian seas. This species has also been found in the Yellow Sea (Qi et al., 1989).

Locality: Peter the Great Bay, Russia, Pacific Ocean, Sea of Japan. Depth: 0-0.2 m. Length: 10-12 mm. 1-5 June 2003. on Vaucheria mats. Photographer: A. V. Chernyshev

• Chernyshev A.V., Chaban E.M. (2005) The first findings of Alderia modesta (Loven, 1844) (Opistobranchia, Ascoglossa) in the Sea of Japan. Ruthenica, 14(2): 131-134 (in Russian).
• Qi Z., Ma X., Wang Z., Lin G., Xu F., Dong Z., Lu D. 1989. Mollusca of Haunghai and Bohai. Beijing: Agricultural Publ. House: 309 p. (in Chinese).

Alexei V. Chernyshev
Institute of Marine Biology, Vladivostok, Russia,
tsher@bio.dvgu.ru

Elena M. Chaban
Zoological Institution, St.-Petersburg, Russia,
cem@EC2579.spb.edu

Chernyshev, A.V. & Chaban, E.M., 2005 (Mar 22) Alderia modesta from eastern Russia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/13381

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