Epimeria (Drakepimeria) colemani d’Acoz & Verheye 2017
- Dataset
- Epimeria of the Southern Ocean with notes on their relatives (Crustacea, Amphipoda, Eusiroidea)
- Rank
- SPECIES
- Published in
- d’Acoz, Cédric d’Udekem, Verheye, Marie L. (2017): Epimeria of the Southern Ocean with notes on their relatives (Crustacea, Amphipoda, Eusiroidea). European Journal of Taxonomy 359: 1-553, DOI: 10.5852/ejt.2017.359
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Malacostraca
- order
- Amphipoda
- family
- Epimeriidae
- genus
- Epimeria
- species
- Epimeria colemani
description
Description ROSTRUM. Long, overreaching tip of article 1 of peduncle of antenna 1 (teeth excluded), weakly curved, sharp-tipped in lateral view. EYE. Very large, elliptic. PEREION – PLEOSOME TOOTH PATTERN. Pereionites 3 to pleonite 3 with mid-dorsal tooth; pereionite 1 to pleonite 3 with pair of posterodorsal teeth or protrusions (those of the pereion are distinctly carinate); pereionites 1 – 2 without any trace of mid-dorsal tooth, with pair of carinate dorsolateral protrusions; pereionite 2 slightly narrower than pereionite 1; pereionite 3 with small blunt-tipped posterior middorsal tooth and pair of small dorsolateral carinate teeth; pereionite 4 to 6 with medium-sized blunttipped broad and regularly curved mid-dorsal tooth and pair of small dorsolateral carinate teeth; pereionite 7 with large acute-tipped and regularly curved mid-dorsal tooth and pair of small dorsolateral carinate teeth; pleonites 1 – 2 with large acute-tipped and regularly curved mid-dorsal tooth and pair of small dorsolateral non-carinate teeth; on pleonite 1 a second pair of (much smaller) dorsolateral teeth is observed between the mid-dorsal tooth and the main pair of dorsolateral teeth; pleonite 3 with large acute-tipped mid-dorsal tooth bearing a weak median notch and pair of small dorsolateral non-carinate teeth (teeth from pereionite 7 to pleonite 3 distinctly longer than more anterior teeth, the size difference being more important in immatures than in adults) COXAE 1 – 3. Strongly carinate and distally sharp. COXA 4. Anterodorsal and anteroventral border nearly straight joined by low and blunt angular discontinuity, anterior angle slightly but distinctly projecting forward; ventral tooth long and acute; lateral carina with obtuse angularity or very obtuse tooth, carina very distant from margin of coxa at its deepest point. COXA 5. With long, sharp, triangular, carinate, lateral tooth pointing obliquely backwards. COXA 6. With mid-sized, sharp, triangular, carinate, lateral tooth pointing obliquely backwards; posteroventral corner rounded, with trace of angular discontinuity. COXA 7. With ventral border slightly curved, with posterior border straight, their convergence forming a sharp squared angle. EPIMERAL PLATES 1 – 3. Posteroventral angle produced into a long and very sharp tooth. UROSOME TOOTH PATTERN. Urosomite 1 with sharp triangular process pointing upwards; urosomite 2 without pair of small posterior dorsolateral teeth pointing upwards. TELSON. Cleft on 0.2; tips of lobes rounded, slit fairly narrow. PEDUNCLE OF ANTENNA 1. Article 1 with long lateral and medial teeth nearly reaching mid of article 2 (teeth excluded) and long ventral tooth reaching tip of article 2 (teeth excluded); article 2 with huge lateral tooth and very large medial tooth considerably overreaching tip of article 3, with ventral tooth slightly overreaching tip of article 3 (tooth excluded); article 3 with well developed ventral tooth, about as long as article itself. GNATHOPODS 1 – 2. Carpus and propodus of normal slenderness; propodus not narrowing distally, palm distinct. PEREIOPODS 5 – 7. Merus, carpus and propodus slender; basis of pereiopods 5 – 6 of normal width, with posteroproximal process rounded and strongly protruding in pereiopod 5, weakly protruding in pereiopod 6, with posterodistal tooth strong; basis of pereiopod 7 very broad with posterodistal tooth sharp, followed more proximally by small concavity, directed posteriorly. Colour pattern Whitish, with vague reddish marks on the mid-dorsal tooth of the posterior body segments (pereionite 7 to urosomite 1), tip of rostrum, tip of pereiopods. Eyes reddish. Body length Up to 47 mm.
description
urn: lsid: zoobank. org: act: 74 A 8958 B- 6 C 00 - 4 D 92 - 89 B 6 - AA 6977 F 51 D 3 A Figs 17 – 26
discussion
Remarks In immature E. colemani sp. nov., the mid-dorsal tooth of pereionite 7 and pleonites 1 – 2 are much longer than in adults and much longer than more anterior mid-dorsal teeth. Epimeria colemani sp. nov. specimens from western stations (South Shetland Islands, Antarctic Peninsula, Eastern Weddell Sea) and the only sequenced specimen from the Adélie Coast (MNHN-IU- 2014 - 7324, extraction M 6) have identical COI haplotypes, whereas the divergence between their 28 S sequences is in the range expected between distinct species (from comparison with other species in this complex) (fig. 1 in Verheye et al. 2016 a as Epimeria SI 5). Additional data would be needed to explain this discrepancy. As morphologically, the specimens from the Adélie Coast cannot be distinguished from the remaining E. colemani, they are provisionally considered as conspecifics.
distribution
Distribution Between King George Island and Elephant Island, Bransfield Strait, eastern shelf of the Weddell Sea, Princess Ragnhild Coast, Prydz Bay, Adélie Coast, western Ross Sea, 397 – 914 m.
etymology
Etymology The species is dedicated to Charles Oliver Coleman (Museum für Naturkunde, Berlin), as a recognition of his important contribution to the knowledge of the taxonomy of the genus Epimeria. The name is a genitive.
materials_examined
Type material Holotype RV Polarstern cruises: SOUTHERN OCEAN: ovigerous ♀, cruise PS 81, ANT-XXIX / 3, Bransfield Strait, stn 196 - 8, 62 ° 47.80 ʹ S, 57 ° 5.35 ʹ W to 62 ° 47.63 ʹ S, 57 ° 5.63 ʹ W, 542 – 580 m, Agassiz trawl, 24 Feb. 2013, coll. C. d’Udekem d’Acoz and M. Verheye (RBINS, INV. 122942) [extraction ANT 37; Genbank nr, COI: KU 870823, 28 S: KU 759596]. Paratypes RV Polarstern cruises: SOUTHERN OCEAN: 2 specs, cruise PS 06, ANT-III / 3, stn 348, eastern Weddell Sea, 72 ° 50 ʹ S, 19 ° 23 ʹ W, 490 m, bottom trawl, 20 Feb. 1985, coll. J. Plötz (RBINS, INV. 132740); 1 spec., cruise PS 06, ANT- III / 3, station unknown, eastern Weddell Sea, Feb. 1985, coll. J. Plötz (RBINS, INV. 132742); 1 small spec., cruise PS 39, ANT-XIII / 3, EASIZ I, stn 1, GSN 1, eastern Weddell Sea, 71 ° 03.10 ʹ S, 11 ° 25.50 ʹ W to 71 ° 02.10 ʹ S, 11 ° 19.30 ʹ W, 462 – 481 m, bottom trawl, 5 Feb. 1996, coll. C. De Broyer and G. Chapelle (RBINS, INV. 132703); 1 small spec., cruise PS 39, ANT-XIII / 3, EASIZ I, stn 1, GSN 1, eastern Weddell Sea, 71 ° 03.10 ʹ S, 11 ° 25.50 ʹ W to 71 ° 02.10 ʹ S, 11 ° 19.30 ʹ W, 462 – 481 m, bottom trawl, 5 Feb. 1996, coll. C. De Broyer and G. Chapelle (RBINS, INV. 132709); 1 spec., cruise PS 39, ANT-XIII / 3, EASIZ I, stn 12, GSN 5, eastern Weddell Sea, 73 ° 18.10 ʹ S, 21 ° 10.10 ʹ W to 73 ° 17.10 ʹ S, 21 ° 08.20 ʹ W, 457 – 459 m, bottom trawl, 14 Feb. 1996, coll. C. De Broyer and G. Chapelle (RBINS, INV. 132695); 1 spec., cruise PS 39, ANT-XIII / 3, EASIZ I, stn 17, GSN 10, eastern Weddell Sea, 73 ° 18.00 ʹ S, 21 ° 09.90 ʹ W to 73 ° 19.10 ʹ S, 21 ° 14.90 ʹ W, 465 – 468 m, bottom trawl, 16 Feb. 1996, coll. C. De Broyer and G. Chapelle (RBINS, INV. 132693); 4 specs, cruise PS 69, ANT-XXIII / 8, stn 661 - 2, between Elephant Island and King George Island, 61 ° 39.29 ʹ S, 57 ° 02.89 ʹ W to 61 ° 39.20 ʹ S, 57 ° 04.75 ʹ W, 466 – 467 m, bottom trawl, 30 Dec. 2006, coll. C. d’Udekem d’Acoz and H. Robert (RBINS, INV. 122549); 3 alcohol-fixed specs, cruise PS 69, ANT-XXIII / 8, stn 662 - 1, between Elephant Island and King George Island, 61 ° 35.91 ʹ S, 57 ° 17.04 ʹ W to 61 ° 35.41 ʹ S, 57 ° 20.60 ʹ W, 425 – 432 m, bottom trawl, 30 Dec. 2006, coll. C. d’Udekem d’Acoz and H. Robert (RBINS, INV. 122492); 2 specs, initially fixed with formalin, cruise PS 69, ANT-XXIII / 8, stn 663 - 1, north of King George Island, 61 ° 38.18 ʹ S, 57 ° 33.17 ʹ W to 61 ° 38.02 ʹ S, 57 ° 37.16 ʹ W, 432 – 434 m, bottom trawl, 30 Dec. 2006, coll. C. d’Udekem d’Acoz and H. Robert (RBINS, INV. 122537); 1 immature spec., cruise PS 71, ANT-XXIV / 2, ANDEEP-SYSTCO, eastern Weddell Sea, stn 48 - 1, 70 ° 23.94 ʹ S, 8 ° 19.14 ʹ W to 70 ° 23.89 ʹ S, 8 ° 18.67 ʹ W, 595 – 602 m, bryozoan bottom (exceptional diversity of bryozoans), Agassiz trawl, 12 Jan. 2008, coll. H. Robert (RBINS, INV. 122901); 1 spec., dissected and illustrated by unpublished line drawings, cruise PS 71, ANT-XXIV / 2, ANDEEP-SYSTCO, eastern Weddell Sea, stn 48 - 1, 70 ° 23.94 ʹ S, 8 ° 19.14 ʹ W to 70 ° 23.89 ʹ S, 8 ° 18.67 ʹ W, 595 – 602 m, bryozoan bottom (exceptional diversity of bryozoans), Agassiz trawl, 12 Jan. 2008, coll. H. Robert (RBINS, INV. 132977) [extraction P 41; Genbank nr, COI: KU 870895, 28 S: KU 759684]; 8 specs, fixed in formalin, cruise PS 71, ANT-XXIV / 2, ANDEEP-SYSTCO, eastern Weddell Sea, stn 48 - 1, 70 ° 23.94 ʹ S, 8 ° 19.14 ʹ W to 70 ° 23.89 ʹ S, 8 ° 18.67 ʹ W, 595 – 602 m, bryozoan bottom (exceptional diversity of bryozoans), Agassiz trawl, 12 Jan. 2008, coll. H. Robert (RBINS, INV. 132455); 2 specs, fixed in alcohol, cruise PS 71, ANT- XXIV / 2, ANDEEP-SYSTCO, eastern Weddell Sea, stn 48 - 1, 70 ° 23.94 ʹ S, 8 ° 19.14 ʹ W to 70 ° 23.89 ʹ S, 8 ° 18.67 ʹ W, 595 – 602 m, bryozoan bottom (exceptional diversity of bryozoans), Agassiz trawl, 12 Jan. 2008, coll. H. Robert (RBINS, INV. 132986); 1 immature spec., cruise PS 77, ANT-XXVII / 3, CAMBIO, eastern Weddell Sea, stn 265 - 2, 70 ° 47.34 ʹ S, 10 ° 40.39 ʹ W to 70 ° 47.13 ʹ S, 10 ° 40.54 ʹ W, 500 – 600 m, Agassiz trawl, 22 Mar. 2011, coll. C. Havermans and H. Robert (RBINS, INV. 132965) [extraction I 9; Genbank nr, COI: KU 870853, 28 S: KU 759630]; 1 ♀, cruise PS 81, ANT-XXIX / 3, Bransfield Strait, stn 193 - 8, 62 ° 43.73 ʹ S, 57 ° 29.04 ʹ W to 62 ° 43.80 ʹ S, 57 ° 29.40 ʹ W, 428 – 431 m, Agassiz trawl, 23 Feb. 2013, coll. C. d’Udekem d’Acoz and M. Verheye (RBINS, INV. 132976) [extraction I 13; Genbank nr, COI: KU 870839, 28 S: KU 759615]; 1 ovigerous ♀, cruise PS 81, ANT-XXIX / 3, Bransfield Strait, stn 193 - 9, 62 ° 43.50 ʹ S, 57 ° 27.92 ʹ W to 62 ° 43.53 ʹ S, 57 ° 28.28 ʹ W, 420 – 428 m, sponge bottom, Agassiz trawl, 23 Feb. 2013, coll. C. d’Udekem d’Acoz and M. Verheye (RBINS, INV. 132966) [extraction ANT 36; Genbank nr, COI: KU 870822, 28 S: KU 759595]; 1 large spec., cruise PS 81, ANT-XXIX / 3, Bransfield Strait, stn 193 - 9, 62 ° 43.50 ʹ S, 57 ° 27.92 ʹ W to 62 ° 43.53 ʹ S, 57 ° 28.28 ʹ W, 420 – 428 m, sponge bottom, Agassiz trawl, 23 Feb. 2013, coll. C. d’Udekem d’Acoz and M. Verheye (RBINS, INV. 122962); 3 large specs, cruise PS 81, ANT-XXIX / 3, Bransfield Strait, stn 196 - 8, 62 ° 47.80 ʹ S, 57 ° 5.35 ʹ W to 62 ° 47.63 ʹ S, 57 ° 5.63 ʹW, 542 – 580 m, Agassiz trawl, 24 Feb. 2013, coll. C. d’Udekem d’Acoz and M. Verheye (RBINS, INV. 122959); 3 specs, cruise PS 81, ANT-XXIX / 3, Bransfield Strait, stn 217 - 6, 62 ° 53.45 ʹ S, 58 ° 13.06 ʹ W to 62 ° 53.42 ʹ S, 58 ° 13.41 ʹ W, 461 – 483 m, rich sponge bottom, Agassiz trawl, 2 Mar. 2013, coll. C. d’Udekem d’Acoz and M. Verheye (RBINS, INV. 122922 A) [extraction K 39, largest specimen; Genbank nr, COI: KU 870871, 28 S: KU 759651]. Other material examined RV Aurora Australis cruises: SOUTHERN OCEAN: 1 spec., cruise CEAMARC, sample CEAMARC 1317, stn 51 AEV 215, Adélie Coast, 66 ° 44 ʹ 52 ″ S, 145 ° 26 ʹ 40 ″ E, 525 – 553 m, beam trawl, 30 Dec. 2007, coll. IPEV-AAD-MNHN (MNHN-IU- 2014 - 7323, removed from MNHN-IU- 2014 - 4279); 1 spec., cruise CEAMARC, sample CEAMARC 2724, stn 71 EV 447, Adélie Coast, 66 ° 24 ʹ 00 ″ S, 140 ° 32 ʹ 21 ″ E, 683 – 791 m, beam trawl, 14 Jan. 2008, coll. IPEV-AAD-MNHN (MNHN-IU- 2014 - 7324, removed from MNHN-IU- 2014 - 4337) [extraction M 6; Genbank nr, COI: KU 870889, 28 S: KU 759673]; 3 specs, cruise CEAMARC, sample CEAMARC 3532, stn 87 EV 524, Adélie Coast, 65 ° 29 ʹ 29 ″ S, 139 ° 18 ʹ 37 ″ E, 397 – 411 m, beam trawl, 17 Jan. 2008, coll. IPEV-AAD-MNHN (MNHN-IU- 2014 - 4353); 5 specs, cruise CEAMARC, sample CEAMARC 3978, stn 36 EV 297, 66 ° 20 ʹ 20 ″ S, 143 ° 41 ʹ 08 ″ E, Adélie Coast, 552 – 573 m, 4 Jan. 2008, coll. IPEV-AAD-MNHN (MNHN-IU- 2014 - 4329). RV Marion Dufresne cruises: SOUTHERN OCEAN: 1 spec., cruise MD 42 (SIBEX), stn 22 - CP 73, Prydz Bay, 66 ° 57 ʹ 25 ″ S, 72 ° 41 ʹ 25 ″ E, depth missing [Google Earth depth for that position: 540 m (accessed 27 Sep. 2016)] 26 Jan. 1985 (MNHN-IU- 2014 - 4259) (typed label); 1 spec., cruise MD 42 (SIBEX), stn 22 - CP 66, Prydz Bay, 66 ° 55 ʹ 45 ″ S, 74 ° 4 ʹ 11 ″ E, depth missing [Google Earth depth for that position: 427 m (accessed 27 Sep. 2016)], 26 Jan. 1985 (MNHN-IU- 2014 - 4266) (typed label). Belgian and Belgian-Dutch Antarctic expedition: SOUTHERN OCEAN: 2 specs, Princess Ragnhild Coast, stn 220, Baie du Glacier, exact coordinates unavailable [presumably about 70 ° 18 ʹ S, 23 ° 58 ʹ E], 414 – 450 m, trawl, 1 Feb. 1965, coll. A. Capart (RBINS, INV. 132737); 2 specs, Princess Ragnhild Coast, stn 220, Baie du Glacier, exact coordinates unavailable [presumably about 70 ° 18 ʹ S, 23 ° 58 ʹ E], 414 – 450 m, trawl, 1 Feb. 1965, coll. A. Capart (RBINS, INV. 132738); 5 specs, Princess Ragnhild Coast, stn 220, Baie du Glacier, exact coordinates unavailable [presumably about 70 ° 18 ʹ S, 23 ° 58 ʹ E], 414 – 450 m, trawl, 1 Feb. 1965, coll. A. Capart (RBINS, INV. 132739). RV Discovery cruises (National Antarctic Expedition 1901 – 1904): SOUTHERN OCEAN: 1 adult ♀, Ross Sea, n ° 13, 914 m (500 fathoms), 22 Jan. 1902, together in the same tube with a juvenile Epimeria, which is identified herein as E. macrodonta s. str., obviously representing paralectotypes of Epimeria macrodonta designated by Lörz et al. (2007), albeit no label indicated their status of paralectotypes (BMNH 1907.6.6.259 - 262) (in part).