Aegires citrinus Pruvot-Fol, 1930
- Location
- Batu Niti, Tulamben, Pulau Bali, Indonesia
- Date
- 2018/01/13
- Length
- 12mm
- Depth
- 15.0m
- Water temperature
- 29.0℃
Description
A small Aegiridae reaching about 10 mm in body length. Ground colour is pale yellow to yellow-brown, with occasional white individuals. The dorsum is sprinkled with mushroom-shaped tubercles (stalked discs) and irregular dark patches. The tubercle tips expose calcareous spicules surrounded by a coat of minute velvety papillae.The rhinophores are smooth and rod-like, the same colour as the body. The gill, comprising 3-5 simply pinnate plumes, is set rather inconspicuously on the posterior dorsum and is partly protected by the surrounding mushroom-shaped tubercles.
Distribution
Widely distributed across the Indian, western, central and southern Pacific Oceans. Records come from Madagascar, Tanzania, Australia, New Caledonia, the Philippines, Palau, Midway Atoll, Japan and Hawaii. It inhabits shallow to moderately deep coral and rocky reefs.Etymology
The specific epithet citrinus is Latin for "lemon-yellow, citron-coloured", referring to the pale yellow body.Remarks
Originally described by Bergh 1875. Aegires pruvotfolae Fahey & Gosliner, 2004 is treated as a junior synonym. The genus Aegires Lovén, 1844 comprises small spicule-rich aegirids that feed on sponges.References
- Aegires citrinus (genus Aegires), Lovén S. (1844). Om nordiska hafs-mollusker. Öfversigt af Kongliga Vetenskaps-Akademiens Förhandlingar, Stockholm. 1(3): 48-53.
- Aegires citrinus n. sp., Pruvot-Fol A. (1930). Diagnoses provisoires (incomplètes) des espèces nouvelles et liste provisoire des Mollusques nudibranches recueillis par Mme A. Pruvot-Fol en Nouvelle-Calédonie (Île des Pins). Bulletin du Muséum National d'Histoire Naturelle, Paris. (2)2(2): 229-233.
- キュウバンウミウシ, 小野篤司. (2004). 沖縄のウミウシ. ラトルズ.
- キイロセンヒメウミウシ(新称), 中野理枝 & 小谷光. (2016). 高知県大月町樫西海域及び一切海域から記録された後鰓類. Kuroshio Biosphere. 12: 21-43.
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 Aegires citrinus
Same Genus Nudibranchs
Similar Colors Nudibranchs
Academic Database
Sea slug observation data is available in international marine biodiversity databases.