Runcinida valentinae A. V. Chernyshev, 2006

Description

A minute runcinid only a few millimetres in body length. The body is elliptical and somewhat flattened, with a translucent integument through which the visceral mass is visible. The dorsum bears scattered pigment spots, and the living animal is pale brown to greyish in ground colour.

Distribution

Type locality: the Russian Far Eastern seas. The species may extend into the northern Sea of Japan and the adjacent north-western Pacific.

Remarks

Some researchers regard this species as conspecific with Runcinida elioti; further taxonomic clarification is needed. The Japanese vernacular has been revised from the earlier "Runkina-umiushi" to the current "Uzumushi-umiushi".

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References

• ルンキナウミウシ, 中野理枝. (2004). 本州のウミウシ. ラトルズ.
• Runcinida valentinae, Chernyshev A.V. 2006. in Russian [New data on mollusks of the family Runcinidae (Gastropoda: Opisthobranchia) from Russian Far Eastern seas]. Byulleten dal'nevostochnogo Malakologicheskogo Obshchestva [Bulletin of the Russian Far East Malacological Society], 10 : 122-125, available online at http://rfems.dvo.ru/bulletin/vol_010/article_08.pdf
• ウズムシウミウシ（改称）, 中野理枝. (2018). 日本のウミウシ. 文一総合出版.