Chromodoris alcalai Gosliner, 2021
- Location
- Cape Maeda, Okinawa Island (Onna and Yomitan area), Okinawa, Japan
- Date
- 2015/09/30
- Length
- 15mm
- Depth
- 8.0m
- Water temperature
- 28.0℃
Description
Ground colour white. The dorsum is greyish blue with dense white dots. The outer mantle margin is bordered with white, and yellow patches may appear within this border. A thick black line runs from the head through the rhinophores and joins behind the gills, but it is often broken with considerable individual variation. Black markings on the midline appear as either spots or lines. Rhinophores yellow. The gills are white at the base, becoming yellow on the distal half. Reaches 60 mm in length.Distribution
Philippines, Japan, Indonesia, Malaysia, Western Australia.Etymology
Dedicated to the Filipino marine biologist Dr. Angel Alcala in recognition of his pioneering contributions to the conservation of Philippine marine biodiversity, on the occasion of his 90th birthday.Remarks
Morphologically very similar to Chromodoris dianae, with which it had been confused prior to formal description. The two species are separated by molecular evidence, external morphology, colour pattern, and internal anatomy. WoRMS lists the authority as Gosliner, 2021; this database follows Gosliner, 2020.References
- Chromodoris dianae sp. nov., Gosliner, T. M.; Behrens, D. W. (1998). Five new species of Chromodoris (Molluscs: Nudibranchia: Chromodorididae) from the tropical Indo-Pacific Ocean. Proceedings of the California Academy of Sciences. 4(50): 139-165., available online at http://www.biodiversitylibrary.org/page/15659747 page(s): 145-150
- ダイアナウミウシ, 益田一. (1999). 海洋生物ガイドブック. 東海大学出版会.
- ダイアナウミウシ, 益田一. (1999). 海洋生物ガイドブック. 第2刷. 東海大学出版会.
- ダイアナエ, 小野篤司. (1999). ウミウシガイドブック. TBSブリタニカ.
- クロモドリス・ディアナエ, 殿塚孝昌. (2003). ウミウシガイドブック〈3〉. TBSブリタニカ.
- ダイアナウミウシ, 小野篤司. (2004). 沖縄のウミウシ. ラトルズ.
- ダイアナウミウシ, 小野篤司 & 加藤昌一. (2009). ウミウシ. 誠文堂新光社.
- トギレフタスジイロウミウシ, 奥谷喬司. (2015). 日本近海産貝類図鑑. 第二版. 東海大学出版部.
- Chromodoris alcalai n. sp., Gosliner T.M. (2021). Sleuthing cryptic Chromodorids (Mollusca, Nudibranchia): adding to Philippine marine biodiversity. Philippine Journal of Systematic Biology. 14(2). https://doi.org/10.26757/pjsb2020b14014
A Kindle field guide by the site author
Kimoto N. (2026). Sea Slugs of Japan & the Indo-Pacific, 2nd Edition.
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Photos of Chromodoris alcalai
Same Genus Nudibranchs
Similar Colors Nudibranchs
Academic Database
Sea slug observation data is available in international marine biodiversity databases.