Gyrocotyle haffii Bray &amp; Waeschenbach &amp; Littlewood &amp; Halvorsen &amp; Olson 2020, n. sp.
Creators: name: Bray, Rodney A.
name: Waeschenbach, Andrea
name: Littlewood, D. Timothy J.
name: Halvorsen, Odd
name: Olson, Peter D.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Platyhelminthes
Cestoda
Gyrocotylidea
Gyrocotylidae
Gyrocotyle
Gyrocotyle haffii

description: <i>Gyrocotyle haffii</i> n. sp. <i>Type-host</i>: <i>Harriotta raleighana</i> Goode &amp; Bean (Chimaeriformes: Rhinochimaeridae), bent-nosed chimaera. <i>Type-locality</i>: Goban Spur (49°46 <i> 0</i> N, 12°21 <i> 0</i> W, depth 1,631–1,653 m, 22-23.iv.2001; RRS <i>Discovery</i> Cruise 252, No. 13951/14), North-East Atlantic. <i>Type-material</i>: Holotype (NHMUK. 2019.11.21.1), paratype (NHMUK. 2019.11.21.2). <i>Site in host</i>: Spiral intestine. <i>Representative DNA sequences:</i> MN655880 (<i>ssrDNA</i>); MN657006 (<i>lsrDNA</i>, domains D1-D3). <i>ZooBank registration</i>: The Life Science Identifier (LSID) for <i>Gyrocotyle haffii</i> n. sp. is urn:lsid:- zoobank.org:act:7717F9D6-4C9D-4C59-8D0A- 4C5E306B4671. <i>Etymology:</i> The species is named in honour of our late colleague and friend Professor Harford ‘Haffi <i> 0</i> 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 <i>c.</i> 268 from anterior extremity. Only other evidence of reproductive organs is putative vitelline glands scattered around posterior extremity of anlagen. Diagnosis <i>Gyrocotyle haffii</i> n. sp. can be diagnosed from other congeners on the basis of unique nucleotide characters in our rDNA alignments (listed as alignment positionnucleotide): <i>ssrDNA</i>: 218-T, 723-A, 746-C, 747-A, 748-G, 1,158-T, 1,654-G, 1,673-C, 2,115-C; <i>lsrDNA</i>: 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 gyrocotylidean from <i>Ha. raleighana</i>, the bentnose chimaera. Parukhin (1966) reported ‘‘ <i>Gyrocotyloides nybelini</i> Fuhrmann, 1931 ’’ in this host from the South Atlantic Ocean. Parukhin (1968) repeated this report saying (in translation) ‘‘Found in <i>Callorhynchus capensis</i>. Two adult parasites were found in two fish. In addition, six larvae were found in one of them. In addition to <i>C. capensis</i>, specimens were found in two <i>Hariota</i> [sic] <i>raleighana</i>. In both cases there were two specimens. Previously, this species was observed in the Atlantic in <i>Chimaera monstrosa</i> ’’. In addition, it seems likely that the records of ‘cestode adults <i> 0</i> from <i>Ha. raleighana</i>, <i>Hy. mirabilis</i> and <i>C. monstrosa</i> from the Rockall Trough off NW Scotland by Mauchline &amp; Gordon (1984) refer to <i>Gyrocotyle</i> spp. There is no reliable morphological character to differentiate this species or indeed any of the gyrocotylidean species circumscribed by molecular means. Therefore, the species is diagnosed by its relatively marked sequence divergence from those of recognised species.
description: Published as part of <i>Bray, Rodney A., Waeschenbach, Andrea, Littlewood, D. Timothy J., Halvorsen, Odd &amp; Olson, Peter D., 2020, Molecular circumscription of new species of Gyrocotyle Diesing, 1850 (Cestoda) from deep-sea chimaeriform holocephalans in the North Atlantic, pp. 285-296 in Systematic Parasitology 97</i> on pages 291-292, DOI: 10.1007/s11230-020-09912-w, http://zenodo.org/record/4623814
description: {"references": ["Parukhin, A. M. (1966). [On the species composition of the helminth fauna of fishes in the South Atlantic]. Materialy Nauchnoi Konferentsii Vsesoyuznogo Obshchestva Gel mintologov &amp;, 219 - 222 (In Russian).", "Parukhin, A. M. (1968). Helminthofauna of fishes of South Atlantic. Biologiya Morya, Kiev, 14, 96 - 113. (In Russian).", "Mauchline, J., &amp; Gordon, J. D. M. (1984). Incidence of parasitic worms in stomachs of pelagic and demersal fish of the Rockall Trough, northeastern Atlantic Ocean. Journal of Fish Biology, 24, 281 - 285."]}