Bathycalanus bucklinae - Species Card - Marine Planktonic Copepods

Species Card of Copepod

Calanoida ( Order )	details
Calanoidea ( Superfamily )	details
Megacalanidae ( Family )	details
Bathycalanus ( Genus )	details	List species for this Genus

Bathycalanus bucklinae Bradford-Grieve, Blanco-Bercial & Boxshall, 2017 (F)

Abbreviations or symbols

Ref.:

(

List of the studied authors )

Bradford-Grieve & al., 2017 (p.118, Descr. F, figs. F, phylogeny)

Species Bathycalanus bucklinae - Plate 1 of morphological figures

Issued from : J.M. Bradford-Grieve, L. Blanco-Bercial & G.A. Boxshall in Zootaxa, 2017, 4229 (1). [p.119, Fig.77].
Female (from 25.082°S, 09.584°E); A-B, habitus (dorsal and lateral, respectively); C, forehead (lateral); D, right lappet of pedigerous somite 5; E, left lappet of pedigerous somite 5; F, P1(anterior view).
Scale bars: 1.0 mm on all figures.

Nota:
- Forehead in dorsal view produced into rounded protrusion dorsal to base of rostrum and extending into pair of small divergent spine-like processes.
- Posterior border of pediger 5, in dorsal view, extending into transparent, asymmetrical lappets, slightly longest on right.
- Genital double-somite symmetrical in dorsal view, widest at about anterior 1/3, 1.21 times longer than wide, seminal receptacles not observed.
- A1 extending beyond caudal rami by about 4 segments.
- P1 exopod with articulation between exopodal segments 2 and 3 well-developed, distolateral corner of endopodal segment 1 bilobed.

Species Bathycalanus bucklinae - Plate 2 of morphological figures

Issued from : J.M. Bradford-Grieve, L. Blanco-Bercial & G.A. Boxshall in Zootaxa, 2017, 4229 (1). [p.120, Fig.78].
Female A1 ancestral segments: A, sdegments I-XI; B, segments XII-XVI; C, segments XVII-XXI; D, segments XXII-XXVIII; E, dorsal surface of segment I-V showing position of hair sensilla (hs) and macula cribrosa (mc); F, detail of segment XXVIII.
Scale bars: 1.0 mm (A-E); 0.1 mm (F).

Nota: Anterior and posterior borders of ancestral segments XVI-XXI smooth. Hair sensillum on ancestral segment II not accompanied by macula cribrosa.

Species Bathycalanus bucklinae - Plate 3 of morphological figures

Issued from : J.M. Bradford-Grieve, L. Blanco-Bercial & G.A. Boxshall in Zootaxa, 2017, 4229 (1). [p.121 Fig.79].
Female: A, A2; B, Md palp; C, Md gnathobase; D, Mx1; E, Mx2; F, mxp/
Scale bars: 1.0 mm (E, F); 0.1 mm on remaining figures.

Nota:
- A2 exopod segment IV with short seta extending to distal border of segment VIII and bearing short setules.
- Mx1 praecoxal arthrite with 13 setae including 2 on posterior surface and 2 setae on anterior surface, one of them small; coxal endite without setae; basal endites 1 and 2 with 2 and 4 setae, respectively; endopod segments with 2 (subequal), 2 (subequal), 5+1 smaller anterior surface seta.
- Mxp syncoxal endite 4 longest, toothed seta exte,ding half way along endopodal segment 2.

Species Bathycalanus bucklinae - Plate 4 of morphological figures

Issued from : J.M. Bradford-Grieve, L. Blanco-Bercial & G.A. Boxshall in Zootaxa, 2017, 4229 (1). [p.122, Fig.80].
Female: A, P2; B, P3; C, P4; D, P5. All legs from anterior view)
Scale bar = 1.0 mm.

Issued from : J.M. Bradford-Grieve, L. Blanco-Bercial & G.A. Boxshall in Zootaxa, 2017, 4229 (1). [p.91, Table 10].
Morphological characters after identification key of Bathycalanus females and males.
Compare to other species of genus.

Main characters identification after species key :
1 - Mx1 praecoxal endite without setae.
2 - Anterior margin of head with 2 very small spine-like processes.
3 - P1 exopod segments 2 and 3 separate;
4 - Pedigerous somites 4 and 5 without laterally extended lappets; Genital double not angular shaped.
5 - Genital double-somite hardly swollen in dorsal view, without spinules. (male unknown).
6 - Pedigerous somite 5 extended posteriorly into asymmetrical, irregularly shaped lappets. (male unknown)

NZ:

Distribution map of Bathycalanus bucklinae by geographical zones

Issued from : J.M. Bradford-Grieve, L. Blanco-Bercial & G.A. Boxshall in Zootaxa, 2017, 4229 (1). [p.84, Fig.46].
Distribution of Bathycalanus species;
Bathycalanus richardi (filled squareç; Bathycalanus bradyi (filled triangle); Bathycalanus milleri (open triangle); Bathycalanus dentatus (open square); Bathycalanus tumidus (open circle); Bathycalanus adornatus (open diamond); Bathycalanus pustulosus (filled star); Bathycalanus unicornis ( (filled diamond); Bathycalanus bucklinae (filled circle); Bathycalanus eximius (cross).

Loc:

(

Geographical glossary )

SE Atlant. (S Walvis Ridge: over Namibia Abyssal Plane).

Type locality : 25.082° S, 9.584° E

Lg.:

(

References of the authors concerning dimensions )

(1316) F: 11,2; {F: 11,2}

Rem.:

Bathy-abyssopelagic (2062-2990 m).
For Bradford-Grieve & al. (2017, p.122) is related to Ba. richardi in that it has a pair of small anterior spine-like processes on the head. This species can be distinguished from any other Bathycalanus species by: 1- pedigerous somite 5 with long asymmetrical posterolateral lappets; 2- body somites smooth and without pustules; 3- a genital double-somite with a widest part, in dorsal view, at 1/3 the distance from the anterior border; 4- female A1 ancestral segment II hair sensillum not accompanied by macula cribrosa; 5- 4 setae on the 2nd basal endite of Mx1.

Last update : 19/06/2023


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