Halirages cainae D'Acoz, 2012, sp. nov.

• Published in: Journal of Geophysical Research: Oceans
• Main Author: D'Acoz, Cédric D'Udekem
• Format: Other/Unknown Material
• Language: unknown
• Published: 2012
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Amphipoda; Calliopiidae; Halirages; Halirages cainae; Norwegian Sea; Seta; Frozen Lake; Arctic
• Online Access: https://zenodo.org/record/3858776; https://doi.org/10.5281/zenodo.3858776

Halirages cainae sp. nov. Figs 1-7 ? Halirages elegans – Oldevig 1959: 65 (pro parte). Etymology Caina (Divine Comedy, Canto XXXII, verse 58): first round of the ninth circle of Dante's Inferno, which the poet describes as a frozen lake. The name alludes to the deep basin of the Norwegian Sea, which is the habitat of the species. With its negative temperatures, this body of icy abyssal water, trapped under a layer of warmer Atlantic waters is not unlike the frozen lake of Dante's Inferno. The vernacular noun in medieval Italian is Latinized as caina, -ae and is a genitive. Type material MAREANO 2009-111 cruise, RV G.O. Sars, R-station 487, sample 157, 69°04'N 012°28'E, 2589- 2615 m, RP-sledge, mud, 8 Oct. 2009: 5 specimens [holotype subadult ♂ mounted on 26 slides in Euparal (ZMBN 87795) and 4 paratypes (ZMBN 87796) of which one is a 40 mm long ovigerous ♀, coll. C. d'Udekem d'Acoz]; MAREANO 2009-111 cruise, RV G.O. Sars, R-station 488, sample 379, 69°44'N 015°11'E, 2241-2245 m, mud, beam trawl, 10 Oct. 2009: 2 adult paratypes, RBINS, I.G. 31227, INV. 100853, coll. C. d'Udekem d'Acoz. Description HEAD. (Figs 1, 2, 3A) Rostrum feeble; anterior lobe of head very bluntly subquadrate (almost rounded), posteriorly followed by narrow sinus; ventral lobe of head acute, pointing forward, not denticulate; eye present, rather small, subreniform, without defined ommatidia, unpigmented in alcohol. ANTENNAE. (Figs 1, 2, 3 A-B) Typical for the genus Halirages; article 1 of peduncle with 2 normally developed ventrolateral distal teeth. UPPER LIP. (Fig. 3C) Apically rounded. LOWER LIP. (Fig. 3D) With narrow mandibular processes and broad outer lobes. MANDIBLE. (Fig. 3 E-F) Incisor process with 4 very blunt teeth; left lacinia mobilis with 4 blunt teeth (left one well developed, right one reduced); molar ridged, lateral margin, with a row of narrow spines, left molar with 2 anterolateral longer setae; palp article 1 short, with 1 D1-seta and 3 short F1-setae; article 2 and 3 equal in length; article 2 stout (3.2 x as long as ...