Gyrocotyle haffii 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: Zenodo 2020
• Subjects: Biodiversity; Taxonomy; Animalia; Platyhelminthes; Cestoda; Gyrocotylidea; Gyrocotylidae; Gyrocotyle; Gyrocotyle haffii; North East Atlantic
• Online Access: https://doi.org/10.5281/zenodo.4623818; http://zoobank.org/7717F9D6-4C9D-4C59-8D0A-4C5E306B4671; http://treatment.plazi.org/id/03C587C15119F968FFFFFC51FF796DE1

Gyrocotyle haffii n. sp. Type-host : Harriotta raleighana Goode & Bean (Chimaeriformes: Rhinochimaeridae), bent-nosed chimaera. Type-locality : Goban Spur (49°46 0 N, 12°21 0 W, depth 1,631–1,653 m, 22-23.iv.2001; RRS Discovery Cruise 252, No. 13951/14), North-East Atlantic. Type-material : Holotype (NHMUK. 2019.11.21.1), paratype (NHMUK. 2019.11.21.2). Site in host : Spiral intestine. Representative DNA sequences: MN655880 ( ssrDNA ); MN657006 ( lsrDNA , domains D1-D3). ZooBank registration : The Life Science Identifier (LSID) for Gyrocotyle haffii n. sp. is urn:lsid:- zoobank.org:act:7717F9D6-4C9D-4C59-8D0A- 4C5E306B4671. Etymology: The species is named in honour of our late colleague and friend Professor Harford ‘Haffi 0 Williams in recognition of his contribution to the understanding of the Gyrocotylidea. Description [Based on a single intact, immature whole worm and second immature worm from which the central portion had been excised for molecular analysis; Figs. 2, 3]. With characters of the order. Body elongate with minute annular ridges; no large lateral flap. Length 23,504; greatest width near anterior extremity, 3,131. Rosette relatively small with few crenulations, 1,943 long. Anterior sucker large, oval, 1,750 X 1,223. Reproductive system immature; anlagen commences 2,852 from anterior extremity, 8,191 long; consisting of a long, narrow patch of stained tissue reaching, and a branched section passing, towards lateral margin of worm; apparently opening at c. 268 from anterior extremity. Only other evidence of reproductive organs is putative vitelline glands scattered around posterior extremity of anlagen. Diagnosis Gyrocotyle haffii n. sp. can be diagnosed from other congeners on the basis of unique nucleotide characters in our rDNA alignments (listed as alignment positionnucleotide): ssrDNA : 218-T, 723-A, 746-C, 747-A, 748-G, 1,158-T, 1,654-G, 1,673-C, 2,115-C; lsrDNA : 612-T, 837-A, 875-T, 1,306-A, 1,395-C, 1,402-A, 1,501-G. Remarks As far as we are aware there is only one previous report of a ...