Boreoclausia recta, Kim & Sikorski & O’Reilly & Boxshall, 2013

Kim, Il-Hoi, Sikorski, Andrey, O’Reilly, Myles & Boxshall, Geoff A., 2013, Copepods associated with polychaete worms in European seas, Zootaxa 3651 (1), pp. 1-62 : 33-35

publication ID

https://doi.org/ 10.11646/zootaxa.3651.1.1

publication LSID

lsid:zoobank.org:pub:2E9DC61F-00B8-42CF-BBB0-41651072F38C

persistent identifier

https://treatment.plazi.org/id/F473E52C-1C66-BB54-059F-FD13216BE9C0

treatment provided by

Felipe

scientific name

Boreoclausia recta
status

n. gen. et n. sp.

Boreoclausia recta n. gen. et n. sp.

Type material: Holotype ♀ (dissected and mounted on a glass slide) from Galathowenia fragilis : 61.02ºN, 03.4643ºE, Troll C 2004, Stn 99r-1, depth 350 m, 04 June 2004; BMNH Reg. No. 2012.1386. GoogleMaps

Female. Body ( Fig. 17A View FIGURE 17 ) elongate, dorsoventrally depressed, with parallel lateral margins, and consisting of cephalosome, first to fifth pedigerous somites, genital complex and 1-segmented abdomen. Prosome-urosome division not marked. Cephalosome 395×275 µm, with anteriorly produced rostral area. First pedigerous somite shortest of all pedigerous somites. Second to fifth pedigerous somites with rudimentary tergite near posterodorsal border of each somite. Fourth and fifth pedigerous somites longer than anterior pedigerous somites, each incompletely subdivided into anterior and posterior halves by lateral constriction. Anterior hoop-like part of genital complex partially separated as short pseudosomite ( Fig. 17A, B View FIGURE 17 ). Genital complex 197×245 µm, parallel-sided but narrowing in posterior quarter; genital apertures located dorsolaterally just posterior to midlength. Singlesegmented abdomen 140×134 µm, with deep posteromedian incision. Caudal ramus 90×40 µm (ratio 2.25:1), with 6 setae and convex medial margin; longest terminal seta 80 µm long, shorter than caudal ramus.

Rostrum as anterior prominence of cephalosome. Antennule ( Fig. 17C View FIGURE 17 ) 7-segmented, with armature formula 1+spine, 8, 4+spine, 1+aesthetasc, 2, 2+aesthetasc, and 7+aesthetasc; first segment strongly expanded anterodistally; spines on first and third segments robust. Antenna ( Fig. 17D View FIGURE 17 ) 4-segmented; first segment unarmed; second segment also unarmed but with row of spinules on medial margin; third segment with 1 thick, spinulose spine, 1 seta, and spinules on medial margin; terminal segment 28×17 µm, with 1 thick, spinulose spine, 3 spinuletipped setae, and 1 simple seta.

Labrum ( Fig. 17E View FIGURE 17 ) with straight posterior margin ornamented with patch of spinules laterally, and several patches of minute spinules in posterior half of ventral surface. Mandible ( Fig. 17F View FIGURE 17 ) tapering distally, with 1 bladelike apical element, articulated at base. Maxillule ( Fig. 17G View FIGURE 17 ) lobate, with 1 inner and 2 outer setae distally. Maxilla ( Fig. 17H View FIGURE 17 ) 2-segmented; proximal segment unarmed; distal segment blunt, with 1 proximal seta; distal half ornamented with spinules. Maxilliped ( Fig. 17I View FIGURE 17 ) 4-segmented; first segment broad and unarmed; second segment longest, with 1 seta; short third segment unarmed; fourth segment with 1 small lateral seta and blunt apex bearing spinulose pad.

Legs 1–3 ( Figs 17J View FIGURE 17 , 18A, B View FIGURE 18 ) with 2-segmented exopod and small, lobate endopod, that of leg 1 spinulose, others naked. Leg 4 ( Fig. 18C View FIGURE 18 ) a papilla tipped by 3 setae. Outer spines on exopod of legs 1–3 massive and spinulose. Outer margin of first exopodal segment of legs 1–3 ornamented with spinules. Armature formula of legs 1–3 as follows:

Leg 1: coxa 0-0; basis 1-0; exp. I-0; II, 1, 1; enp. (lobe)

Leg 2: coxa 0-0; basis 1-0; exp. I-0; I, I, 0; enp. (lobe)

Leg 3: coxa 0-0; basis 1-0; exp. 0-0; I, 1, 0; enp. (lobe)

Leg 5 ( Fig. 18D View FIGURE 18 ) as small papilla tipped by 2 naked setae. Leg 6 represented by 1 seta and 2 spinules in genital area ( Fig. 17B View FIGURE 17 ).

Male. Unknown.

Etymology. The specific name is derived from the Latin rectus meaning “straight” and alludes to the straight body, with parallel lateral margins.

Remarks. The distal blade on the mandible is articulated at its base with the segment in this species.

Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF