Jasmineiricola mackiei Boxshall, O'Reilly, Sikorski & Summerfield, 2015, n. gen.
Jasmineiricola mackiei n. gen. et n. sp. Type material. Holotype ♀ plus 4 ♀♀ paratypes from single specimen of Jasmineira caudata , Huldra, Stn 8 - 2 (60.8463 ºN, 2.616804 ºE), depth 123 m, 0 5 June 1999; collected by A. Sikorski; NHMUK Reg. No. Holotype ♀...
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Zenodo
2015
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| Online Access: | https://dx.doi.org/10.5281/zenodo.6094151 https://zenodo.org/record/6094151 |
| Summary: | Jasmineiricola mackiei n. gen. et n. sp. Type material. Holotype ♀ plus 4 ♀♀ paratypes from single specimen of Jasmineira caudata , Huldra, Stn 8 - 2 (60.8463 ºN, 2.616804 ºE), depth 123 m, 0 5 June 1999; collected by A. Sikorski; NHMUK Reg. No. Holotype ♀ 2015.447, paratypes ♀♀. 2015.448 - 451. Northern North Sea. 1 ♀ paratype from J. caudata , North Sea, Conoco Lyell Field (60 o 53 ' 56.62 "N, 0 1 o 16 ' 17.23 "W), depth 140 m; July 1991; collected by S. Hamilton. 10 ♀♀ paratypes from 7 specimens of J. caudata , northern North Sea from Statfjord Field (Blocks 33 / 34); 1996: collected by S. Hamilton. 1 ♀ paratype from J.caudata , Oseberg Sør, Stn 13 - 3 (60.3965 ºN, 2.784167 ºE), depth 99 m, 0 4 May 1998; collected by A. Sikorski. 2 ♀♀ paratypes from 2 specimens of J. caudata , Nordøstflanken, Stn 2 - 2, (61.35 ºN, 1.9475 ºE), depth 152 m, 17 May 1998; collected by A. Sikorski. 3 ♀♀ paratypes from J. caudata , Nordøstflanken, Stn 1-2, (61.33333 ºN, 1.9605 ºE), depth 150 m, 17 May 1998; collected by A. Sikorski. 1 ♀ paratype from J. caudata , Nordøstflanken, Stn 6 - 2, (61.36917 ºN, 1.942166 ºE), depth 170 m, 17 May 1998; collected by A. Sikorski. 2 ♀♀ paratypes from 2 specimens of J. caudata , Nordøstflanken, Stn 9 -2, 4, (61.361 ºN, 1.92 ºE), depth 153 m, 18 May 1998; collected by A. Sikorski. 1 ♀ paratype from J. caudata , Nordøstflanken, Stn 10 - 4, (61.3705 ºN, 1.928666 ºE), depth 161 m, 18 May 1998; collected by A. Sikorski. 1 ♀ paratype from J. caudata , Nordøstflanken, Stn 12 - 6, (61.40317 ºN, 1.879166 ºE), depth 161 m, 18 May 1998; collected by A. Sikorski. 1 ♀ paratype from J. caudata , Vigdis, Stn 9 - 3 (61.3782 ºN, 2.104756 ºE), depth 279 m, 30 May 1999; collected by A. Sikorski. 2 ♀♀ paratypes from J. caudata , Vigdis, Stn 15 - 3 (61.37692 ºN, 2.094748 ºE), depth 276 m, 30 May 1999; collected by A. Sikorski. 1 ♀ paratype from J. caudata , Tordis, Stn 4 - 3 (61.2751 ºN, 2.120787 ºE), depth 202 m, 30 May 1999; collected by A. Sikorski. 2 ♀♀ paratypes from 2 specimens of J. caudata , Huldra, Stn 9 -2, 3, (60.8564 ºN, 2.652572 ºE), depth 123 m, 0 4 June 1999; collected by A. Sikorski. 1 ♀ paratype from J. caudata , Huldra, Stn 1 - 1 (60.85328 ºN, 2.650849 ºE), depth 123 m, 0 4 June 1999; collected by A. Sikorski. 2 ♀♀ paratypes from J. caudata , Huldra, Stn 11 - 1 (60.85974 ºN, 2.664455 ºE), depth 123 m, 0 4 June 1999; collected by A. Sikorski, [Specimens used for SEM]. 1 ♀ paratype from J. caudata , Huldra, Stn 16 - 1 (60.93292 ºN, 2.555287 ºE), depth 125 m, 0 5 June 1999; collected by A. Sikorski. 2 ♀♀ paratypes from J. caudata , Statfjord Øst, SFEK Stn 8 - 2 (61.37767 ºN, 1.9095 ºE), depth 156 m, 13 June 1999; collected by A. Sikorski. 3 ♀♀ paratypes from J. caudata , Gullfaks, Stn 1-8 (61.09441 ºN, 2.19321 ºE), depth 133 m, 17 June 1999; collected by A. Sikorski. 2 ♀♀ paratypes from J. caudata , Gullfaks, Stn 12 - 3 (59.2054 ºN, 2.212357 ºE), depth 218 m, 19 June 1999; collected by A. Sikorski, [Specimens used for SEM]. 2 ♀♀ paratypes from J. caudata , Regional IV, Stn 9 - 3 (61.12257 ºN, 2.397248 ºE), depth 188 m, 19 June 1999; collected by A. Sikorski, [Specimens used for SEM]. 1 ♀ paratype from J. caudata , Veslefrikk, Stn 7 - 1 (60.78652 ºN, 2.9121 ºE), depth 177 m, 24 May 2004; collected by A. Sikorski. 1 ♀ paratype from J. caudata , Veslefrikk, Stn 1 (60.7432 ºN, 2.942 ºE), depth 168 m, 24 May 2004; collected by A. Sikorski, [Specimen used for SEM]. 1 ♀ paratype from J. caudata , Vigdis F 2005, Stn 5 - 3 (61.31358 ºN, 2.077643 ºE), depth 222 m, 14 June 2005; collected by A. Sikorski. Registration numbers NHMUK 2015.452 - 461. High Latitude Norwegian waters (non-type). 2 ♀♀ from J. caudata , Resi Stangnes 0 6, Stn 5 - 1 (68 º 48.459 ’N, 16 º 36.753 ’E), depth 74 m, 28 June 2006; collected by A. Sikorski. 1 ♀ from J. caudata , Vega 2006, Stn 2 - 1 (65.70004 ºN, 12.133338 ºE), depth 130 m, 0 4 December 2006; collected by A. Sikorski. 9 ♀♀ from 7 specimens of J. caudata , Mainstram F-07, Forsan Stn G 4 - 1 (67.95466 ºN, 15.626 ºE), depth 33 m, 11 May 2007; collected by A. Sikorski. 2 ♀♀ from 2 specimens of J. caudata , Mainstram F-07, Stn 2 - 1 (67.95734 ºN, 15.63483 ºE), depth 32 m, 11 May 2007; collected by A. Sikorski. 4 ♀♀ from 4 specimens of J. caudata , Narvik Kom, Taraldsvik, Stn T 4 (68.45305 ºN, 17.43757 ºE), depth 90 m, 19 July 2009; collected by A. Sikorski. 2 ♀♀ from J. caudata , Ellingsen, Stn T 3 - 2 (67.8961 ºN, 16.22328 ºE), depth 166 m, 14 October 2009; collected by A. Sikorski. 1 ♀ from J. caudata , Oseberg Sør, Stn OSS 16 (60.61029 ºN 02.777862ºE), depth 104 m, 26 May 2013; collected by A. Sikorski. 3 ♀♀ from 2 specimens of J. caudata , Storvika, Stn 3 A (67 º 32.222 ’N, 15 º 17.995 ’E), depth 19 m, 21 May 2014; collected by A. Sikorski. 3 ♀♀ from 2 specimens of J. caudata , Storvika, Stn 4 B (67 º 32.272 ’N, 15 º 18.420 ’E), depth 32 m, 21 May 2014; collected by A. Sikorski. Registration numbers NHMUK 2015.452 - 461. Scotland (non-type). 2 ♀♀ from J. caudata , NW Scotland, Loch Fyne, Meall Mhor, SEPA Stn 9; depth 25 m; August 1993; collected by M.O’Reilly; NHMUK Reg. No. 2015.452 - 461. 1 ♀ from J. caudata , NW Scotland, Loch Linnhe, Gorston Stn 2, depth unknown, 7 July 2004; collected by P. Garwood; NHMUK Reg. No. 2015.452 - 461. 1 ♀ from J. caudata , NW Scotland, Loch Hourn, Stn 3 a, depth unknown, 11 May 2005; collected by P. Garwood. 1 ♀ from J. caudata , NW Scotland, Sound of Mull, Funiary Stn 5 E REF (56 o 33.280 ’N, 0 5 o 64.620 ’W) depth 19 m; 17 August 2006; collected by J. Hunter & S. Hamilton; NHMUK Reg. No. 2015.452 - 461. 1 ♀ from J. caudata , NW Scotland, Ullapool, Ardmair, Fish Farm Stn AC 1 b; depth unknown; 29 June 2010; collected by J. Hunter/S. Hamilton. 1 ♀ from J. caudata , (Unico. sample 47557) NW Scotland, Western Isles, Gardline Survey 843510, Dev Site 20 -MFB, depth unknown; 15 July 2010. Ireland (non-type). 1 ♀ from J. caudata , Ireland, Dunmore 07- 1 UCL, depth unknown, 2008; collected by P. Garwood; NHMUK Reg. No. 2015.452 - 461. 1 ♀ from J. caudata , (Unico. sample 43870) Irish Sea, CEFAS Stn G05, ADJSED, (53 º 30.600 ’N, 05º 14.400 ’W), depth unknown; 2008. Additional non-type material. 2 ♀♀ from 2 specimens of J. caudata , Sweden, Kosterfjord, SW of Yttre Vattenholm, depth unknown, 27 August 1986; collected by Andy Mackie (National Museum of Wales), Reg. No. NMWZ 1986.108. 1 ♀ from J. caudata , Sweden, Kosterfjord, SW of Yttre Vattenholm, depth unknown, 28 October 1989; collected by Andy Mackie (National Museum of Wales). 1 ♀ from Jasmineira sp. (posterior missing), North Sea, Osprey Oilfield, Stn 4 A (61 º 10 ’N, 01º 10 ’E), depth 150-180 m, 1990; collected by Brian Cleator. 2 ♀♀ from J. candela , Veslefrikk- 98, Stn 2 - 2 (60.7645 ºN, 2.920833 ºE), depth 174 m, 16 May 1998; collected by A. Sikorski; NHMUK Reg. No. 2015.462 - 463. 1 ♀ from J. elegans , (Unico. sample 34024), Northern Ireland, Belfast Lough, NIEA Stn SDCS, (54 o 50.526 'N, 0 5 o 42.852 'W), depth unknown; 31 March 2004; collected by Tim Mackie. 1 ♀from J. elegans , (Unico. sample 46849), North Sea, Arundel/Farragon Oilfield, Gardline Survey GDLARUFA 10, Stn A09- 24 -a, depth unknown, 0 9 September 2009. 1♀ damaged, ectosoma broken off from host Jasmineira sp. fragment; (Unico. sample 40611); North Sea, Brent Oilfield, Gardline Survey GDL 211290, Stn BRA GR 11 FA, depth 140 m; 17 April 2007. 2♀♀ from Jasmineira sp. fragment, (Unico. sample 41005), North Sea, Brent Oilfield, Gardline Survey GDL 211290, Stn BRA GR 18 FA, depth 141 m; 20 June 2007. 1♀ on Jasmineira sp., NW Scotland, Little Loch Broom, Ardessie Fish Farm site ABC 2 b, depth unknown, 26 December 2010; collected by J. Hunter/S. Hamilton. 1 ♀ on Jasmineira sp., NW Scotland, Little Loch Broom, Ardessie Fish Farm site AA 1 b, depth unknown, 12 July 2011; collected by J. Hunter/S. Hamilton. 1 ♀ from Jasmineira sp. fragment, (Unico. sample 43872) Irish Sea, CEFAS Stn G05 ADJSED, (53 º 28.800 ’N 05° 16.800 ’W), depth unknown; 2008. 1 ♀ from Jasmineira sp. fragment, (Unico. sample 43879) Irish Sea, CEFAS Stn G 18 MDAC, (53 º 28.800 ’N 05° 16.800 ’W), depth unknown; 2008. Etymology. The name of the new species honours Dr. Andy Mackie (National Museum of Wales) who found material of this parasite in 1986. Description. The adult female is highly transformed and lacks any trace of external segmentation (Fig. 1 A, B). The body comprises a well defined head region carried anteriorly on the trunk which is expanded transversely to form paired anterolateral lobes and extends posteriorly to a genito-abdominal lobe. The head and anterior part of the trunk bearing the anterolateral lobes are collectively referred to as the endosoma which is embedded within the body of the host (Figs 1 E, 2 A–C) while the posterior genitoabdominal lobe, the ectosoma, protrudes through the body wall of the host and carries the paired egg sacs (Figs 2 A, B, 3 A, B). The adult female body exhibits torsion, twisting through 90 º in the region between the endosoma and the ectosoma, so the posterior genitoabdominal lobe is directed towards the anterior end of the host (Figs 2 A, B, 3 A, B). This torsion is not shown by developing females that have not yet erupted through the body wall of the host (Fig. 1 F). The head region is clearly defined and its ventral surface bears a rosette-like array of eight slender, tapering lobes (Fig. 1 C), which are arranged as four pairs and probably represent modified mouthparts. Immediately posterior to the junction of the head region and trunk are the paired maxillipeds. The maxillipeds are well developed, subchelate appendages (Fig. 1 D) comprising a robust proximal segment and a curved distal claw. The claw is armed with a short stout spine proximally. No trace of swimming legs was detected. The anterolateral trunk lobes are typically dorso-ventrally flattened but are variable in shape, depending partly on their position within the host, and also on their state of development. They contain the ovaries and in mature females (Figs 1 A, 2 A) the lobes are relatively larger than in developing females (Fig. 1 F). The lobes can be symmetrical or asymmetrical. The posterior genitoabdominal lobe (= ectosoma) visible externally on the host (Fig. 4 A–D) is a rounded diamond-shape, approximately 180 Μm long by 190 Μm wide, and carries paired genital apertures posterolaterally and a median anus posteriorly (Fig. 4 C, D). Each genital aperture is rounded and closed off by an unarmed genital operculum (Fig. 4 C). The anus is slit-like and carried on a small anal prominence (Fig. 4 D). The integument of the dorsal surface is slightly ridged and in the mid-line, dorsal to the anal prominence, there is a patch where the epicuticular ridges are raised into spiniform microstructures (Fig. 4 D). Around the base of the anal prominence several paired integumental pores are present. No vestiges of caudal rami were found. The ectosoma contains paired cement glands which extend through into the endosoma (Fig. 2 B). The egg sacs are paired and the arrangement of eggs within the sac may be linear, biseriate, or multiseriate: the mean number of eggs per sac was 24.3 (± 10.2), with a range of 11 to 47 (N = 15). The egg sacs are often uniseriate near their origin at the female gonopore but most sacs contain two (Fig. 2 B) or more irregular rows of eggs. The maximum number of eggs observed in a single sac was 47, and this sac had four irregular rows of eggs over much of its length. Male. Unknown. Hosts. The parasite is specific to the sabellid genus Jasmineira and has been reported from three host species. The majority of records are from the type host J. caudata Langerhans, 1880, but it was also found on J. candela (Grube, 1863) in Norwegian waters and on J. elegans Saint-Joseph, 1894 in UK waters. Prevalence and intensity of infection. The number of parasites present on 58 infected J. caudata was 81, giving a mean intensity of 1.40 parasites per worm, and the number of adult females per infected host ranged from one to five (Fig. 5). The maximum number of adult females found on a single host was five: on this maximally infected host three females were positioned on the left side of the worm (Fig. 1 E), one each in setigers 2, 3 and 4, and two females were on the right side in setigers 2 and 3. The ectosoma of the female in setiger 2 was erupted further than that of the female on setiger 3, and the female on setiger 4 was only detected when the worm was cleared in lactic acid because it had not yet erupted through the body wall of the worm. This young female (Fig. 1 F) did not exhibit the torsion in the region between the endosoma and ectosoma. We infer from this that an earlier infective stage in the life cycle must have penetrated the host, commenced metamorphosis within the host, and that the ectosoma erupts through the body wall of the host as the developing female approaches maturity. Few data are available on the prevalence rate of Jasmineiricola mackiei n. gen. et n. sp. , as the numbers of uninfected hosts in the samples are generally unavailable, however in one sample from Loch Fyne in Scotland, just a single J. caudata was infected out of a total of 11 examined, a prevalence rate of 9.1 %. The discovery of an infected host containing a parasite that had not erupted through the body wall, indicates that such early stages might be difficult to detect and that prevalence rates might be underestimated. Position on host. Post-metamorphic adult females are embedded in the anterior part of the host, usually on setiger 2 (Figs 1 E, 2 B, 3 A–B). Viewed from the outside the posterior end of the ectosoma is directed towards the anterior end (head) of the host. The egg sacs are therefore directed towards the distal opening of the host’s tube (Fig. 3 A–B) and lie within the space between the worm and its tube. When multiple infections occur, one or more of the specimens may be positioned more posteriorly, on setigers 3 or 4, but the typical position is on setiger 2. Geographical and depth distribution. Records are reported here from numerous localities off the northwestern coast of Europe extending northwards from the Irish Sea and the sea lochs on the west coast of Scotland, through the northern North Sea, as far east as the Swedish coast at Kosterfjord, and up into Norwegian waters as far north as 68.5 °N, beyond the Arctic Circle. The known depth range extends from 19 to 279 m, and the mean depth of occurrence was 136 m, based on all records for which depth data were available (39 stations). : Published as part of Boxshall, Geoff A., O'Reilly, Myles, Sikorski, Andrey & Summerfield, Rebecca, 2015, A new genus and family of copepods (Crustacea: Copepoda) parasitic on polychaetes of the genus Jasmineira Langerhans, 1880 (family Sabellidae) in the northeastern Atlantic, pp. 426-436 in Zootaxa 4018 (3) on pages 429-433, DOI: 10.11646/zootaxa.4018.3.6, http://zenodo.org/record/235977 : {"references": ["Langerhans, P. (1880) Die wurmfauna Madeiras. II. Z eitschrift fur wissenschaftliche Zoologie, 33 (1 - 2), 271 - 316.", "Grube, A. E. (1863) Beschreibung neuer oder wenig bekannter Anneliden. Beitrag: Zahlreiche Gattungen. Archiv fur Naturgeschichte, Berlin, 29, 37 - 69, pl. 1 - 3.", "Saint-Joseph, A. d'A. de (1894) Les Annelides polychetes des cotes de Dinard. Troisieme Partie. Annales des Sciences Naturelles, Paris, Series 7, 17, 1 - 395."]} |
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