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Calanoida ( Order ) |
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Calanoidea ( Superfamily ) |
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Megacalanidae ( Family ) |
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Bradycalanus ( Genus ) |
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Bradycalanus abyssicolus Bradford-Grieve, Blanco-Bercial & Boxshall, 2017 (F) | |
| | | | | | | Ref.: | | | Bradford-Grieve, Blanco-Bercial & Boxshall, 2017 (p. 68, figs. F) |  Issued from : J.M. Bradford-Grieve, L. Blanco-Bercial & G.A. Boxshall in Zootaxa, 2017, 4229 (1). [p.70, Fig. 37]. Female (from 64.999°S, 43.020°W): A-B, habitus (dorsal and lateral, respectively); C, forehead (lateral), D, posterior pedigerous somite 5 (lateral view); E, genital double-somitre (lateral); F, P1 (posterior view). Scale bars: 1.0 mm (A, B, E, F); 0.1 mm (C, D). Nota: - Forehead crested, rostral base thick. - Rostrum directed posteriorly in lateral view with pair of curled tapering filaments; - Pedigerous somite 5 with short, symmetrical posterior lappets with posteroventral extension usually directed posteriorly ( bent ventrally in illustrated specimen); lappets exte,ding less than 1/3 of way along genital double-somite. - Genital double-somite in dorsal view with slight bulge at about midlength, in lateral view, genital area with posterior transverse ridge giving ventral outline flattened appearance. - A1 extends about 5-6 segments beyond caudal rami. - P1 exopod segment 3 elongate and narrow, nearly 5 times as long as maximum width; distal border of endopod segment 1 extends to distal border of exopod segment 1; exopod outer spines: on segment 1 extends 1/3 distance to outer spine on segment 2; on segment 2 extends about 1/3 distance to proximal outer spine on segment 2; segment 3 proximal spine extends half distance to outer distal spine.
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 Issued from : J.M. Bradford-Grieve, L. Blanco-Bercial & G.A. Boxshall in Zootaxa, 2017, 4229 (1). [p.71, Fig. 38]. Female: A, A1 ancestral segments I-IX; B, A1 ancestral segments X-XVI; C, A1 ancestral segments XVII-XXI; D, A1 ancsetral segments XXII-XXVIII; E, reduced setae of segment 1; F, hair sensillum on dorsal surface of segment III; G, A2; H, Md palp. Scale bars: 1.0 mm (A-D); 0.1 mm on remaining figures. Nota: - A2 exopod ancestral segments I-III each with vestigial seta, ancestral segment IV with relatively well-developed seta extending as far as base of seta on segment IX.
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 Issued from : J.M. Bradford-Grieve, L. Blanco-Bercial & G.A. Boxshall in Zootaxa, 2017, 4229 (1). [p.72, Fig. 39]. Female: A, Md gnathobase; B, Mx1 (B1 = basal endite, C = coxal endite); C, coxal endite (C) and basal endite 1 (B1) of Mx1; D, Mx2; E, detail of vestigial coxal epipodite; F, detail of endopod of Mx2; G, Mxp. Scale bars: 1.0 mm (D, G); 0.1 mm on remaining figures. Nota: - Mx1 coxal endite with only 2 setae; endopod segment 3 with posterior surface seta moderately long. - Mxp 2nd most proximal seta on endopod segments 3-5 1/3 of longest seta.
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 Issued from : J.M. Bradford-Grieve, L. Blanco-Bercial & G.A. Boxshall in Zootaxa, 2017, 4229 (1). [p.73, Fig. 40]. Female: A, P2; B, P3; C, P4; D, P5. All legs in anterior view
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 Issued from : J.M. Bradford-Grieve, L. Blanco-Bercial & G.A. Boxshall in Zootaxa, 2017, 4229 (1). [p.66, Table 7]. Morphological characters after identification key of Bradycalanus females and males. Compare to other species of genus. Main characters identification after species key : 1 - Head crested; posterior pediger 5 corners with posteroventral attenuated extension in lateral view ; Mx1 coxal endite with 2 setae. (male unknown)
| | | | | NZ: | 3 | | |
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Distribution map of Bradycalanus abyssicolus by geographical zones
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| | | | | | | Loc: | | | Argentine Basin, Central Weddell Sea and equatorial Atlantic Ocean.
Type locality: 64.999° S, 43.020° W. | | | | N: | 1 | | | | Lg.: | | | (1316) F: 11,0-11,80; {F: 11,0-11,80} | | | | Rem.: | Abyssopelagic species living at depths > 4000 m.
For Bradford-Grieve & al; (2017, p.73) this species is only in the genus to have a crested head, a reduced number of setae on the coxal endite of Mx1, and a narrow P1 exopod, in particular exopodal segment 3 which is nearly 5 times its maximum width. | | | Last update : 31/07/2018 | |
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 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 November 21, 2024] © copyright 2005-2024 Sorbonne University, CNRS
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