Aricidea catherinae Laubier, 1967: 112 –118, figs. 4, 5A–D.
Aricidea (Acesta) catherinae.— Strelzov 1973: 91 –93, fig. 38.
Aricidea (Acmira) catherinae.— Hartley 1981: 138; Gaston 1984: 2.43–2.45, fig. 2.44; Blake 1996: 56 –57, fig. 2.14; Hartmann-Schröder 1996: 379; Aguirrezabalaga 2012: 169 –172, figs. 58–59.
Material examined. 4018 Tisnes Ref. R2; 69.5852°N–18.8660°E; 40 m; 31.03.2008; three specimens. 5034 Rottbogen 1; 69.6922°N–18.9186°E; 6 m; 06.07.2010; one specimen. 5088 Melkøya 4; 70.6900°N–23.5720°E; 52 m; 23.08.2010; two specimens. 6244 Oseberg C OSC–05; 60.6124°N–2.7717°E; 105 m; 28.05.2013; two specimens. 6244 Regionale stasjoner REG–15; 60.6888°N–2.6984°E; 117 m; 28.05.2013; six specimens. 5390 G7122/7-1; 71.05°N-22.05°E; 340 m; 08.09.2015; 14 specimens. 5390 E7122/4-1; 71.05°N-22.05°E; 340 m; 10.09.2015; eight specimens. 5390 S7220/10-1; 71.05°N-22.05°E; 340 m; 10.09.2015; eight specimens.
Diagnosis. Antenna long, reaching second chaetiger. Secondary ciliary organs present. Three prebranchial segments. Branchiae numbering up to 25 pairs; those in posterior branchial region ending in a long filament. Modified notochaetae absent. Neuropodial capillaries not thicker than notopodial ones. Modified neurochaetae with terminal spine and tip of stem covered by a fine hood.
Distribution. Mediterranean (Laubier 1967). Eastern Atlantic, from areas of North Sea adjacent to Norway (Hartley 1981) to Portugal (Gil & Sardà 1999). Barents Sea (Strelzov 1973). Canadian Arctic (Stewart et al. 1985; Conlan et al. 2008). Western Atlantic, from Newfoundland (Kenchington et al. 2001) to Caribbean (Díaz-Díaz et al. 2009). Eastern Pacific, from California (Blake 1996) to Panama (Aguado & López 2003) and Chilean Patagonia (Montiel et al. 2002). Andaman Sea (Lovell 2002).