|
|
 |
|
Calanoida ( Order ) |
|
|
|
Ryocalanoidea ( Superfamily ) |
|
|
|
Ryocalanidae ( Family ) |
|
|
|
Yrocalanus ( Genus ) |
|
|
| |
Yrocalanus kurilensis Renz, Markhaseva & Laakmann, 2018 (F,M) | |
| | | | | | | Ref.: | | | Renz & al., 2018 (p.19, Descr.F, M, figs.F, M, molecular phylogeny) |  Issued from : J. Renz, E.L. Markhaseva & S. Laakmann in Zool. J. Linnean Soc., 2018, XX. [p.20, Fig.11] Female (from 43.2333°N, 153.9666°E): A-B, habitus (dorsal and lateral, respectively); C, rostrum (ventral view); D-E, urosome (ventral and lateral, respectively); F, A1 (blacked out setae represent a different kind of short setae present on several segments). Scale bars: A-B, F: 0.5 mm; C-R: 0.1 mm. Nota: - Prosome 4.6 times as long as urosole. - Rostrum 2-pointed. - Cephalosome and pediger 1 partly fused, pedigers 4-5 separate. In lateral view, posterolateral corners of prosome extended posteriorly into points, reaching distal margin of the genital double-somite. - Urosome 4-segmented. - Genital double somite symmetrical, with short spinules distolaterally on right side and ventromedial genital opening; in lateral view seminal receptacles elongated, turned upward. - Dorsal posterior margins of genital double somite to 3rd urosomal somite each with row of spinules. - Caudal rami symmetrical, with row of spinules on inner margin and with 2 lateral setae (II and III), 3 terminal setae (IV-VI) and 1 dorsal seta (VII). - A1 24-segmented, extending to distal border of pediger 2.
|
 Issued from : J. Renz, E.L. Markhaseva & S. Laakmann in Zool. J. Linnean Soc., 2018, XX. [p.21, Fig.12] Female: A, A2; B-C, Md (with gnathobase figured separately in different positions); D, Mx1; E, Mx2. Scale bars: A-E: 0.1 mm. Nota: - A2: coxa with 1, basis with 2 setae; endopod segment 1 - Md: gnathobase curribg edge with 8 unequal teeth plus ventral seta; basis with 3 setae; exopodal segments incompletely fused, with 6 setae; 1st endopodal segment with 2 setae, 2nd with 10 setae.
- Mx1: praecoxal arthrite with 9 terminal spines, 4 posterior and 1 anterior satae; posterior and anterior surface of praecoxal arthrite with small spinules; coxal endite with 6 setae, coxal epipodite with 8 setae; proximal basal endite with 4 setae, distal basal endite with 5 setae; endopod with 14 setae; exopod with 11 setae.
- Mx2: proximal praecoxal endite bearing 3 setae plus attenuation in holotype, 4 setae plus attenuation in paratype, distal praecoxal endite with 3 setae; coxal endites with 3 setae each; coxa with 1 outer seta; proximal basal endite with 3 setae; remaining endopod with 8 setae. All endites except for praecoxal endite with surface spinules.
|
 Issued from : J. Renz, E.L. Markhaseva & S. Laakmann in Zool. J. Linnean Soc., 2018, XX. [p.22, Fig.13] Female: A, Mxp; B, P1 (with endopod figured separately); C, P2; D, P3 (with endopod figured separately); E, P4 (with endopod figured separately). Scales bars: A-E: 0.1 mm. Nota: Mxp: syncoxa with 1 seta on proximal praecoxal endite, 2 setae on middle endite, and 3 setae on distal praecoxal endite; coxal endite with 3 setae; syncoxa with row of spinules. Basis with 3 distal setae; endopod with 2, 4, 4, 3, 3 + 1, and 4 setae and rowo of spinules at setae basis on segment 3 and 4.
|
 Issued from : J. Renz, E.L. Markhaseva & S. Laakmann in Zool. J. Linnean Soc., 2018, XX. [p.24, Table 5] Female & Male: Seta and spine formula from:the Kurile-Kamchatka Trench.
|
 Issued from : J. Renz, E.L. Markhaseva & S. Laakmann in Zool. J. Linnean Soc., 2018, XX. [p.23, Fig.14] Male (from 46.2333°N, 155.5333°E): A, prosome (dorsal); B, habitus (lateral); C, rostrum (ventral view); D, urosome (dorsal); E, left A1; F, right A1 (segments I-XIX); G, right A1 (segments XX-XXVIII); H, P5. Scale bars: A-B: 0.2 mm; C-H: 0.1 mm. Nota: - Rostrum 2-pointed. - Cephalosome and pediger 1 almost completely fused, pedigers 4 and 5 separate. - In lateral view, posterolateral corners of prosome extended posteriorly into points, slightly extending urosomite 1. - Caudal tami symmetrical, with 2 lateral setae (II and III), 3 terminal setae (IV-VI) and 1 dorsal seta (VII). - Lefy A1 unmodified, 24-segmented, extending to urosome. Right A1 strongly modified for grasping, 24-segme,nted; segments XX-XXVI strongly enlarged; segment XX with 1 distal strong hook-like attenuation; segment XXI with a straight, strong, spine-like attenuation and a serrated strong spine; segments XXIII-XXIV with a large plate; segment XXI with lateral lamella; hinges occurring between segments XVIII and XIX, XIX and XX, XX and XXI, and XXII and XXIII. - A2 as in female, except endopod segment 2 with 16 setae/ Md similar to that of female, except basis with 2 setae. - Mx1 as in female, but exopod with 10 setae. - Mx2 similar to that of female, but proximal praecoxal endite bearing 3 setae. - Mxp as in female. - P5 uniramous on both sides. Right leg 2-segmented, with small terminal spine, shorter than left leg. Left leg with exopod 3-segmented; segment 2 with row of spinules distally, segment 3 with medial row of spinules.
| | | | | NZ: | 1 | | |
|
Distribution map of Yrocalanus kurilensis by geographical zones
|
| | | | Loc: | | | NW Pacif. (Kurrile-Kamchatka)
Type locality: 43.5666° N, 153.9666° E. | | | | N: | 1 | | | | Lg.: | | | (1223) F: 1,75; M: 1,53-1,58; {F: 1,75; M: 1,53-1,58} | | | | Rem.: | Hyperbenthic (above the sea bed at depth: 5376 m) | | | Last update : 19/06/2023 | |
|
|
 Any use of this site for a publication will be mentioned with the following reference :
Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2024. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed October 14, 2024] © copyright 2005-2024 Sorbonne University, CNRS
|
|
|
|
;)
;)
;)
;)
;)
