Pleusymtes actiniae Marin & Sinelnikov & Antokhina 2022, sp. nov.

• Published in: Geophysical Research Letters
• Main Authors: Marin, Ivan N., Sinelnikov, Sergey Yu., Antokhina, Tatiana I.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2022
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Amphipoda; Pleustidae; Pleusymtes; Pleusymtes actiniae; Arctic; Barents Sea; Northeast Atlantic
• Online Access: https://doi.org/10.5281/zenodo.6567538; http://treatment.plazi.org/id/03AC4D4541222379FDB9FDCE1322AB17

Pleusymtes actiniae sp. nov. urn:lsid:zoobank.org:act: 3053898B-8088-4AFD-84D7-4CCED1F81E97 Figs 1–5 Diagnosis Eyes with distinct light rim; AI with peduncular article 1 relatively short, not produced distoventrally; Gn I–II weakly dimorphic, GI smaller than GII, propodus (palm) strongly beveled with a well-defined palmar margin, carpus of GnII with blunt distoventral process; EpI–III without strongly produced ventroproximal corners; PpIII–VII with long and simple dactyli, PVII with smooth posterior margin of basis; UI peduncle without distal ecdysial spine; telson entire, suboval; colouration distinctly yellowbrown-white banded. Etymology The species is named after its host – actinians, or sea anemones (Cnidaria: Anthozoa: Hexacorallia: Actiniaria), in the English-speaking version of the common name of these animals. However, in Russianspeaking version, the word ‘ АКТиния ’ (Eng: ‘ actinia ’) (gender feminine) has a more common meaning for these animals. Type material Holotype NORTHEAST ATLANTIC – Barents Sea • ♀ (tbl. 8.5 mm); Russian (Murman) coast, Dolgaya Bay (Guba Dolgaya); 69°11′07.5″ N, 34°58′02.8″ E; 16–18 m depth; 21 Aug 2019; T. Antokhina leg.; SCUBA, on sea anemones Urticina eques growing on a rock wall; ZMMU Mb-1222. Paratypes NORTHEAST ATLANTIC – Barents Sea • 1 ♀ (tbl. 7.5 mm); same collection data as for holotype; ZMMU Mb-1224 • 1 ♂ (tbl. 7.0 mm) (dissected); same collection data as for holotype; ZMMU Mb- 1223. Additional material NORTHEAST ATLANTIC – Barents Sea • 2 ♀♀, 1 ♂; same collection data as for holotype; LEMMI. Description BODY (Fig. 1). Slightly inflated, pereonal and pleonal sternites smooth, without any sculpture or dorsal/ middorsal carina. HEAD (Fig. 1). Slightly longer than pereonites I and II combined, rostrum short, about 0.2 times length of basal peduncular segment of antenna I; eyes large, occupying most of the head, subreniform, with distinct light rim; anterior head lobe prominent, bluntly rounded. ANTENNA I (Fig. 2a). Medium length, nearly 0.8 times body length (Fig. 1); ...