Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Aetideidae ( Family )
            Chiridiella ( Genus )
Chiridiella macrodactyla  Sars, 1907   (F)
Syn.: no Chiridiella macrodactyla : A. Scott, 1909 (p.79, figs.F); no Farran, 1908 b (p.46, figs.F); no Tanaka, 1957 a (p.57, figs.F); Tanaka & Omori, 1970 b (p.153);
? C. abyssalis : Johnson, 1963 (p.92, fig.F)
Ref.:
Sars, 1907 (p.8, Descr.F); Sars, 1925 (p.50, figs.F); Farran, 1926 (p.248); Rose, 1933 a (p.95, figs.F); Lysholm & al., 1945 (p.16); Vervoort, 1952 c (n°44, p.3, figs.F,M); Østvedt, 1955 (p.14: Table 3); Vervoort, 1963 b (p.156, Rem.); Bradford, 1971 b (p.21, Rem.); Deevey, 1974 (p.456, 458, 469, figs.F); Markhaseva, 1996 (p.99, figs.F, Rem.); Chihara & Murano, 1997 (p.683, Pl.33: F); Boxshall & Halsey, 2004 (p.59: fig.F); Vives & Shmeleva, 2007 (p.557, Rem.F)
Species Chiridiella macrodactyla - Plate 1 of morphological figuresissued from : E.L. Markhaseva in Proc. Zool. Inst. RAN, St. Petersburg, 1996, 268. [p.100, Figs.74, 75].
Female (from Sars, 1924); A, B, C, D from specimen of N Atlant. (from Markhaseva, 1996).


Species Chiridiella macrodactyla - Plate 2 of morphological figuresissued from : G.A. Deevey in Bull. Mar. Sc., 1974, 24 (2). [p.464, Fig.15].
Female (from 32°10'N, 64°10'W): a, habitus (lateral); b, A2; c, Mxp (endopod setae not shown); d, Md; e, P1; f, P2; g, P4; h, P3; i, Mx1; j, Mx2.
Scale on left margin for part a; at lower right for parts b-j. Scales in mm.

Nota : For Deevey (1974, p.465) it is some hesitation that the specimenns are identified as C. macrodactyla

Species Chiridiella macrodactyla - Plate 3 of morphological figuresissued from : G.A. Deevey in Bull. Mar. Sc., 1974, 24 (2). [p.464, Fig.15].
Female (from 32°10'N, 64°10'W): a, habitus (lateral); b, A2; c, Mxp (endopod setae not shown); d, Md; e, P1; f, P2; g, P4; h, P3; i, Mx1; j, Mx2.
Scale on left margin for part a; at lower right for parts b-j. Scales in mm.


Species Chiridiella macrodactyla - Plate 4 of morphological figuresissued from : G.A. Deevey in Bull. Mar. Sc., 1974, 24 (2). [p.467, Fig.17c].
Female: c, Mx2.
Scale in mm.


Species Chiridiella macrodactyla - Plate 5 of morphological figuresChiridiella macrodactyla 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 fourth endite of Mx2 arranged like pincers.
4 - Endopodal segment 2 of Md with 3 setae. Mx1 with exopod, exopod with 4 setae.
5 - Protopodite of Mxp with 2 setae in distal group.
6 - P3-P4 with 3-segmented rami.


Species Chiridiella macrodactyla - Plate 6 of morphological figuresIssued from: G.O. Sars in Résult. Camp. Scient. Prince Albert I, 69, pls.1-127 (1924). [Pl.XVI, figs. 1, 2, 9].
Female (from Azores Islands): 1-2, habitus (dorsal and lateral, respectively); 9, P1.


Species Chiridiella macrodactyla - Plate 7 of morphological figuresIssued from: G.O. Sars in Résult. Camp. Scient. Prince Albert I, 69, pls.1-127 (1924). [Pl.XVI, fig. 3].
Female: 3, forehead (left lateral view), showing prominent labium and labium..


Species Chiridiella macrodactyla - Plate 8 of morphological figuresIssued from: G.O. Sars in Résult. Camp. Scient. Prince Albert I, 69, pls.1-127 (1924). [Pl.XVI, figs. 4, 5, 6].
Female: 4, A2; 5, Md; 6, Mx1.


Species Chiridiella macrodactyla - Plate 9 of morphological figuresIssued from: G.O. Sars in Résult. Camp. Scient. Prince Albert I, 69, pls.1-127 (1924). [Pl.XVI, figs. 7, 8].
Female: 7, Mx2; 8, Mxp.


Species Chiridiella macrodactyla - Plate 10 of morphological figuresIssued from: G.O. Sars in Résult. Camp. Scient. Prince Albert I, 69, pls.1-127 (1924). [Pl.XVI, figs. 10, 11].
Female: 10, P2; 11, P4.


Species Chiridiella macrodactyla - Plate 11 of morphological figuresChiridiella macrodactyla female ;
1 - Penultimate lobe of Mx2 with 1 long and 1 short spine arranged as pincers.
2 - Mx2 with 4 or 5 lobes.
3 - A1 not extending beyond genital segment.
4 - Proximal lobe of Mx2 with 2 long setae.
5 - 1st basipod segment of Mxp with 2 distal setae, 2nd segment with 3 setae.

Compl. Ref.:
Damas & Koefoed, 1907 (p.400, tab.II); Østvedt, 1955 (p.14: Table 3, p.61); Sewell, 1948 (p.499, 546, 550); C.B. Wilson, 1950 (p.188); De Decker & Mombeck, 1964 (p.11); Grice & Hulsemann, 1965 (p.223); 1967 (p.14); Roe, 1972 (p.277, tabl.1, tabl.2); Björnberg, 1973 (p.323, 38); Deevey & Brooks, 1977 (p.256, Table 2, station "S"); Vives, 1982 (p.291); Lozano Soldevilla & al., 1988 (p.58); Shih & Young, 1995 (p.66); Suarez-Morales & Gasca, 1998 a (p.107)
NZ: 7 + 2 doubtful

Distribution map of Chiridiella macrodactyla by geographical zones
Loc:
South Africa (E), G. of Guinea, off Morocco-Mauritania, Canary Is., W Africa, Brazil, Azores, Caribbean Sea, Sargasso Sea, Station "S" (32°10'N, 64°30'W), Bay of Biscay, ? W Ireland, ? Norway Sea, Indian, ? Halmahera Sea, China Seas (South China Sea), N Chile.

Type locality Azores Islands.
N: 20
Lg.:
(1) F: 2,7; (14) F: 3-2,6; (37) F: 2,65-2,35; (38) F: 2,8-2,56; (199) F: 2,66-2,58; {F: 2,35-3,00}
Rem.: Meso-bathypelagic. Sargasso Sea: 500-1500 m (Deevey & Brooks, 1977, station "S");
For Vervoort (1963 b, p.156) among the Aetideidae the position of the genus Chiridiella is very isolated and the systematical position, in absence of males is obscure.
Certain locality records would be doubtful (notably in the Pacific).
For Deevey (1974) and Markhaseva (1996) the species reported under this name by Farran (1908 b) is not correct.
See remarks Chiridiella ovata.
Markhaseva (1996, p.99) otes the inadequancy and sometimes contradictory nature of the species descriptions, making the status of this species rather obscure. Three females attibued by the author as C. macrodactyla were found in the Antarctic (Indian sector) and NE Atlantic: their cephalon and 1st thoracic segment incompletely separated; endopod of P3-P4 3-segmented (subdivision incomplete). The specimens differ from C. macrodactyla described by Sars (1924-25) and Deevey (1974) with respect to endopodal segment 2 of Md and protopodite of Mxp setation. C. ovata Deevey (1974) and C. abyssalis Brodsky (1950) are similar to C. macrodactyla. C. macrodactylaW differs from C. abyssalis in 3-segmented of P3-P4 rami; from C. ovata in presence of 2 (not 1) setae in distal group on Mxp protopodite; from C. sarsi in number of setae on exopodal 2 of Md (5 setae) and in smaller size.
Last update : 02/09/2021
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