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Type: Article
Published: 2019-02-04
Page range: 556–570
Abstract views: 138
PDF downloaded: 3

The formerly enigmatic Unidentiidae in the limelight again: a new species of the genus Unidentia from Thailand (Gastropoda: Nudibranchia)

Koltzov Institute of Developmental Biology RAS, 26 Vavilova Str., 119334 Moscow, Russia Zoological Museum, Moscow State University, Bolshaya Nikitskaya Str. 6, 125009 Moscow, Russia
New Heaven Reef Conservation Program, 48 Moo 3, Koh Tao, Suratthani, Thailand 84360 Reef Biology Research Group, Department of Marine Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
New Heaven Reef Conservation Program, 48 Moo 3, Koh Tao, Suratthani, Thailand 84360
Gothenburg Natural History Museum, Box 7283, S-40235, Gothenburg, Sweden Gothenburg Global Biodiversity Centre, Box 461, S-40530, Gothenburg, Sweden
National Museums Northern Ireland, Holywood, Northern Ireland, United Kingdom Queen’s University, Belfast, Northern Ireland, United Kingdom
Zoological Museum, Moscow State University, Bolshaya Nikitskaya Str. 6, 125009 Moscow, Russia
Mollusca morphological and molecular data new species nudibranchs unidentiids


An integrative molecular and morphological study is presented for the family Unidentiidae. Molecular phylogenetic analyses were conducted with the inclusion of all previous and newly obtained molecular data for the family Unidentiidae Millen & Hermosillo 2012. A new species of the genus Unidentia Millen & Hermosillo 2012, U. aliciae sp. nov., is described from Thailand as part of an inventory of sea slugs at Koh Tao. All up-to-date available morphological data for the species of the genus Unidentia is for the first time summarized. Morphological differences among the different species of Unidentia are clarified showing that every species has its own distinguishable morphological traits. According to the new molecular and morphological data, the family Unidentiidae is re-confirmed as a well-supported taxon of the aeolidacean nudibranchs. The taxonomy and phylogeny of the Aeolidacea in the light of the family Unidentiidae is briefly discussed and necessity of a fine-scale and narrowly-defined taxa approach instead of a ‘‘superlumping’’ one is highlighted.



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