Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Aetideidae ( Family )
            Chiridiella ( Genus )
Chiridiella bichela  Deevey, 1974   (F, juv.M)
Syn.: ? Chiridiella macrodactyla : Farran, 1908 (p.46, Pl. IV, figs.6-14)
Ref.:
Deevey, 1974 (p.451, figs.F, juv.M); Markhaseva, 1996 (p.88, figs.F)
Species Chiridiella bichela - Plate 1 of morphological figuresissued from : E.L. Markhaseva in Proc. Zool. Inst. RAN, St. Petersburg, 1996, 268. [p.91, Fig.66].
Female. P.md: mandibular palp; Gn: genital segment (ventral view); GntbMd: gnathobase of Md.


Species Chiridiella bichela - Plate 2 of morphological figuresissued from : G.B. Deevey in Bull. Mar. Sc., 1974, 24 (2). [p.449, Fig.5].
Female (from 32°10'N, 64°30'W): a-b, habitus (dorsal and lateral, respectively); c, P1; d, A2; e, Mx1; f, Mxp.
Scale at left center for parts a and b; at bottom for parts c-f. Scales in mm.
Nota: Cephalothorax 80 % of total length ; urosome 25 % of cephalothorax length. A1 23-segmented, reaching to genital segment. Endopod of A2 about 2/3 length of exopod. P1 exopod with 2 edge spines


Species Chiridiella bichela - Plate 3 of morphological figuresissued from : G.B. Deevey in Bull. Mar. Sc., 1974, 24 (2). [p.450, Fig.6].
Female: c, P2; d, P4; e, P3; f, A1; h, Md; i, Mx2.

Immature Male: a-b, habitus (dorsal and lateral, respectively); g, P5.

Scale at left center for parts a and b; at bottom for parts c-i. Scales in mm.


Species Chiridiella bichela - Plate 4 of morphological figuresissued from : E.L. Markhaseva in Proc. Zool. Inst. RAN, St. Petersburg, 1996, 268. [p.91, Fig.66].
Female: Mx2.


Species Chiridiella bichela - Plate 5 of morphological figuresChiridiella bichela female:
1 - Mx2 with 5 endites.
2 - Mx2 strongly modified in comparison with typical; first-fifth endites of varying size; Setation is not typical, some number of setae on third-fifth endites transformed into pincers-like spines.
3 - Setae of third and fourth endites of Mx2 arranged like pincers.
4 - Exopod of P1 with 2 external spines. A1 nearly as long as cephalothorax.


Species Chiridiella bichela - Plate 6 of morphological figuresChiridiella bichela female ;
1 - 3rd and 4th lobes of Mx2 each with pincer arrangement.
2 - A1 approximately cephalothorax length.
3 - Mx2 long and slim.
4 - P1 exopod with 2 edge spines.

Compl. Ref.:
Deevey & Brooks, 1977 (p.256, tab.2, Station "S")
NZ: 2

Distribution map of Chiridiella bichela by geographical zones
Species Chiridiella bichela - Distribution map 2
Chart of 1996
Loc:
off Bermuda: Station "S" (32°10'N, 64°30'W), Kuril-Kamchatka (in Markhaseva & Razzhivin, 1993, p.611)
N: 4
Lg.:
(37) F: 2,8-2,5; (224) F: 2,5; {F: 2,50-2,80}
Rem.: bathy & abyssopelagic. Sargasso Sea: 1500-2000 m (Deevey & Brooks, 1977, station "S");
For Deevey (p.448) this species is closely similar to C. macrodactyla Farran 1908 but did not figure the small 2nd lobe on Mx2; Mxp is similar except that Farran figured only 1 seta on the 2nd segment; of the females from Deevey, two individuals appeared to have only 1 seta on this segment; Farran also figured P3 with 2 exopod segments and did not indicate that his specimens were gibbous.
Last update : 26/07/2018
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2021. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed February 28, 2021]

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