Bitentaculate Cirratulidae (Annelida, Polychaeta) collected chiefly during cruises of the R / V Anton Bruun, USNS Eltanin, USCG Glacier, R / V Hero, RVIB Nathaniel B. Palmer, and R / V Polarstern from the Southern Ocean, Antarctica, and off Western South America Author Blake, James A. text Zootaxa 2018 2018-12-21 4537 1 1 130 journal article 22563 10.11646/zootaxa.4537.1.1 897dc544-e3e9-46db-b36e-4aa995caabc4 1175-5326 3771214 169CBE5C-3A6E-438B-8A81-0491CBFBAC85 Chaetozone corona Berkeley & Berkeley, 1941 Chaetozone spinosa corona Berkeley & Berkeley, 1941: 45–46 . Chaetozone corona : Hartman 1960: 125 ; 1961: 109–110 ; 1969: 235 , figs. 1–3; Blake 1996: 285–287 , figs. 8.6; Çinar & Ergen 2007: 341–345 , figs. 2–4; Dean & Blake 2007: 46–47 , fig. 3; Çinar 2009: 2304–2305 ; Çinar et al . 2011: 2115 ; Çinar et al . 2012a: 1462 ; Çinar et al . 2012b: 960 ; Çinar & Dagli 2013: 925 ; Blake 2015: Table 2 ; Le Garrec et al . 2017: 433–445 , fig. 3. Material examined . Off Ecuador , SEPBOP , R / V Anton Bruun Cr. 18B, Sta. 768-D, 10 Sep 1966 , 03°36ʹS , 80°38ʹW , ca. 50 m (1, USNM 1490770 ) . Descriptive remarks . The single specimen is complete, 16 mm long, 1 mm wide, and with about 60 setigerous segments. The pre-setigerous region is short and thick with a triangular-shaped prostomium and thick peristomium with a rounded dorsal crest. The characteristic eyespots are not visible, possibly having faded after 50 years in preservative. Three neuropodial spines are present from setiger 1; a single notopodial spine is present from setiger 4. Posterior segments contain partial cinctures with three notopodial acicular spines and five neuropodial spines. The spines alternate with capillaries. Long natatory-like capillary setae arise from anterior and middle-body notopodia. Small oocytes are present in the coelom. General remarks . This single specimen is the first record of Chaetozone corona from the SE Pacific off South America. Previous Pacific records are from California to Costa Rica ( Blake 1996 ; Dean & Blake 2007 ). Other records of the species are from Brazil , the Mediterranean Sea, and the Bay of Biscay; these records are summarized by La Garrec et al. (2017) . The widespread occurrence of C. corona outside the Pacific Ocean suggests it may be an introduced species in those sites ( Le Garrec et al . 2017 ). Distribution. Eastern Pacific, California to Ecuador , 24–120 m ; Brazil , shallow water; Bay of Biscay, 12–33 m ; Mediterrean Sea, 2.5– 90 m .