Gyrocotyle discoveryi Bray & Waeschenbach & Littlewood & Halvorsen & Olson 2020, n. sp.

• Main Authors: Bray, Rodney A., Waeschenbach, Andrea, Littlewood, D. Timothy J., Halvorsen, Odd, Olson, Peter D.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2020
• Subjects: Biodiversity; Taxonomy; Animalia; Platyhelminthes; Cestoda; Gyrocotylidea; Gyrocotylidae; Gyrocotyle; Gyrocotyle discoveryi; Bray; Porcupine Seabight; North East Atlantic
• Online Access: https://zenodo.org/record/4623826; https://doi.org/10.5281/zenodo.4623826

Gyrocotyle discoveryi n. sp. Type-host: Hydrolagus mirabilis (Collett) (Chimaeriformes: Chimaeridae), large-eyed rabbitfish. Type-locality: Goban Spur, North-East Atlantic. Other localities: Porcupine Seabight (51°09 0 N, 11°55 0 W, depth 1,200 m, 30.xi.2002, RRS Discovery Cruise, No. 15048-14, 15); Goban Spur (49°49 0 N, 11°44 0 W, depth 1,175–1,250 m, 27.iv.2001, RRS Discovery Cruise 252, No. 13963/17, 20, 24, 72; 49°41 0 N, 11°53 0 W, depth 1,053–1,077 m, 23.iv.2001, RRS Discovery Cruise 252, No. 13962/4; 49°47 0 N, 11°58 0 W, depth 1,240–1,360 m, 19.x.2002, RRS Discovery Cruise D 266, No. 15066-124, 125; 51°09 0 N, 11°55 0 W, depth 1200 m, 30.ix.2002, RRS Discovery Cruise D 266, No. 15063-103), North-East Atlantic. Type-material: Holotype (NHMUK 2019.11.21.3), paratypes (NHMUK.2019.11.21.4-13 from Goban Spur; NHMUK.2019.11.21.14-19 from Porcupine Sea Bight).). Site in host: Spiral intestine. Representative DNA sequences: MN655879 and MN655881 (ssrDNA); MN657003-MN657005, MN657007- MN657009, MN657011 (lsrDNA, domains D1-D3). ZooBank registration: The Life Science Identifier (LSID) for Gyrocotyle discoveryi n. sp. is urn:lsid:- zoobank.org:act:7B028A0B-B8EB-495E-A9F1- F29DDB60B89A. Etymology: The species is named after the RRS Discovery, the NERC research vessel on which the specimens were collected. Description [Based on 17 specimens; Figs. 4–6.] With characters of the order. Body relatively squat, with deeply crenulated margins, 8,634 –17,586 X 4,996 –8,439 (12,071 X 6,676), width 36–98 (60)% of length. Anterior sucker distinct, 1,149 –1,621 (1,347) long, 596–1,022 (771) wide. Uterus large, in central part of body, 1,546 –2,996 (2,232) from anterior extremity, 2,453 –6,226 (4,533) long, 35–43 (38)% of body length. Rosette distinct, fairly complex, 1,797 –3,092 (2,575) long, junction with soma not clear. Eggs tanned, operculate, 85– 97 X 39–56 (89 X 49). Diagnosis Gyrocotyle discoveryi n. sp. can be diagnosed from other congeners on the basis of unique nucleotide characters in our rDNA alignments (listed as ...