| Summary: | BASEODISCUS URGORRII SP. NOV. (FIGS 3G, H, 7F, G) Baseodiscus sp. DNA105581: Andrade et al. , 2012: 157. Zoobank registration: urn: lsid: zoobank. org:act: BBF6E937-7250-495D-B216-EE5284EA04C5. Type material: Holotype, MCZ IZ- 135319 (morphological specimen); MCZ DNA 105581 (extracted DNA); 5 October 2009, about 800 m depth, off the coast of Vigo (42°42′43″N, 11°49′53″W), Pontevedra, Galicia, Spain, collected by G. Giribet at station 27-AT of the DIVA-ARTABRIA II Expedition. Sequences: From the holotype: JF293052, 18S (1770 bp); HQ856862, 28S (2570 bp); JF277568, 16S (502 bp); HQ848588, COI (657 bp). Determined by Andrade et al. (2012) and deposited in GenBank as derived from Baseodiscus sp. 1 SA-2011. Description: Background body colour whitish, dorsally tinged with light brown (Figs 3G, 7F, G). Everted proboscis white in colour (Fig. 3H). Distribution: So far known only from the type locality, sublittoral, off Galicia, Spain, in the Atlantic Ocean (present study). Etymology: The new specific name is a noun in the genitive case, in honour of Professor Victoriano Urgorri (University of Santiago de Compostela, Spain), who organized the DIVA-ARTABRIA II Expedition, in which the type material was collected. Remarks: Baseodiscus urgorrii represents the fourth sublittoral congener recorded from the north-east Atlantic, after Baseodiscus alpha (Joubin, 1902), Baseodiscus abyssorum (Vaillant & Joubin in Joubin, 1902) and Baseodiscus filholi (Joubin, 1902). These can be distinguished by body colour and markings, except for B. alpha (see below). Baseodiscus alpha , originally established as Eupolia alpha Joubin, 1902, is herein regarded as a nomen dubium , because the taxon was established without any information on external features in the living state; consequently, any future material would hardly be identifiable with certainty as this species. In addition, both the exact type locality and, more importantly, depth information for this species are uncertain due to a discrepancy in the sampling data. Joubin (1902: ...
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