Euchone perseyi Zenkewitsch 1925, new combination

Euchone perseyi (Zenkewitsch, 1925) new combination

Chone Perseyi Zenkewitsch, 1925: 11 –12, Figs 1–7.

Material examined. Non-type material. Arctic Ocean [LACM – AHF] Beaufort Sea, Northwest of Cape Halkett, Alaska, Coll. Andrew Carey: SMG–1773 (43), SMG–1774 (36), SMG–1796 (71).

Remarks. Chone perseyi was described from Novaya Zemlya (Arctic Ocean), type material is missing, but according to the original description by Zenkewitsch (1925) and additional materials from the Arctic Ocean, in this study the species is transferred to Euchone due to the fact that the species have corresponding diagnostic features: 1) 5 pairs of radioles; 2) long paired pinnules; 3) radiolar skeleton with two rows of cells; 4) palmate membrane and flanges present; 5) ventral lips present, small, rounded; 6) dorsal lips elongate; 7) one pair of ventral radiolar appendages; 8) anterior peristomial ring lobe bilobed, exposed beyond collar; 9) glandular ridge on chaetiger 2 narrow; 10) short, broadly hooded thoracic notochaetae; 11) bayonet chaetae; 12) thoracic uncini acicular with teeth of unequal sizes; 13) abdominal uncini from the anal depression as rasp-shaped plates; without main fang, breast poorly developed, handles absent; 14) posterior depression without lateral flanges.