Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Clausocalanidae ( Family )
            Farrania ( Genus )
Farrania frigida  (Wolfenden, 1911)   (F,M)
Syn.: Drepanopsis frigidus Wolfenden, 1911 (p.245, Descr.F, figs.F); Farran, 1929 (p.208, 232, Rem.); Sewell, 1929 (p.96, fig.F); Hardy & Gunther, 1935 (1936) (p.159, Rem.); ; Sewell, 1948 (p.574); Vervoort, 1951 (p.61, 69, figs.F, Rem.); Tanaka, 1956 c (p.399, fig.F); Vervoort, 1957 (p.38, Rem.); Shih & Young, 1995 (p.72);
? Farrania oblonga Sars, 1920 c (p.5, Descr.F); 1925 (p.36, figs.F); Rose, 1933 a (p.87, figs.F); Wiebe & al., 1988 (tab.7); Fernandes, 2008 (p.465, Tabl.2)
C.B. Wilson, 1950 (p.226, fig.F, Rem.); Vervoort, 1957 (p.38, Rem.); Grice & Hulsemann, 1967 (p.20, figs.F,M); Bradford, 1971 (p.17, fig.F); Razouls, 1994 (p.52, figs.F,M); Bradford-Grieve & al., 1999 (p.878, 915, figs.F,M); Vives & Shmeleva, 2007 (p.631, figs.F,M, Rem.); Park & Ferrari, 2009 (p.143, Table 3, Appendix 1, biogeography from Southern Ocean)
Species Farrania frigida - Plate 1 of morphological figuresissued from : O. Tanaka in Publ. Seto Mar. Biol. Lab., V (3). [p.400, Fig.21]. As Drepanopsis frigidus.
Female: a, habitus (dorsal); b, head (left lateral aspect); c, urosome (dorsal); d, last thoracic segment and genital somite (left side); e, rostrum (ventral aspect); f, A2; g, masticatory edge of Md; h, Mx1; i, P1; j, P2; k, P4.

Species Farrania frigida - Plate 2 of morphological figuresissued from : G.D. Grice & K. Huisemann in Proc. U.S. natn. Mus., 1967, 122 (3583). [p.47, Figs.4-15].
Male (from Indian Ocean): 4, habitus (dorsal); 5, idem (lateral right side); 6, distal end of right A1; 7, proximal part of right A1; 8, Md (mandible blade); 9, Mx1 (1st inner lobe omitted); 10, second basal segment and endopod of Mx1; 11, Mx2; 12, Mxp; 13, P1; 14, P5.
Nota: A1 reaches to end of furca. The male is distinguished from F. orba (Tanaka, 1956) by the rounded 5th thoracic segment and the structure of P5.
Nota: A1 reaches to end of caudal rami, segments 20-21 fused and 22 of right A1 each with patch of thick hair. 5th thoracic segment small and rounded. P5 asymmetrical, right leg longer than left one.

Female: 15, posterior end of thorax and urosome (lateral right side).

Species Farrania frigida - Plate 3 of morphological figuresissued from : R.B.S. Sewell in Mem. Indian Mus., 1929, X. [p.97, Fig.39]. As Drepanopsis frigidus.
Female (from S India): a, Mx1; b, A2 (2nd exopodal segment); c, P2 (endopod); d, P3; e, P4; f, P5.

Species Farrania frigida - Plate 4 of morphological figuresissued from : R.N. Wolfenden in Die Marinen Copepoden der Deutschen Südpolar-Expedition 1901-1903, 1911. [p.246, Fig.29]. As .
Female: a, habitus (lateral); b, P5.

Species Farrania frigida - Plate 5 of morphological figuresissued from : W. Vervoort in Verh. K. ned. Akad. Wet., Afd. Natuurk., 1951, (Sect. 2) 47 (2). [p.60, Fig.34]. As .
Female (± 66°.5S, 11°W):a-b, habitus (lateral and dorsal, respectively).
Nota : Head and 1st thoracic segment fused (a trace of a line of separation is visible on the sides), 4th and 5th separate. ; postero-lateral thoracic margin triangularly produced, apical portion bluntly pointed, the flap covers less than half the length of the genital segment. Proportional lengths of cephalothorax and abdomen as 49 :9. Frontal organ with apair of minute hairs ; the frontal organ carries a backwardly directed, setiform spine, which is almost hidden between the basal portions of A1.

Species Farrania frigida - Plate 6 of morphological figuresissued from : W. Vervoort in Verh. K. ned. Akad. Wet., Afd. Natuurk., 1951, (Sect. 2) 47 (2). [p.62, Fig.35]. As .
Female: a, posterior part cephalothorax, left P4 and urosome (dorsal); b, idem (lateral; left P5 also visible); c, frontal portion of cephalon (ventral aspect to show the position of the rostrum).
Nota: Urosome very short, 4-segmented ; proportional lengths with the caudal rami 32 :11 :16 :11 :30 = 100. Genital segment broader than long (proportions 17 :15). ; ventrally with a weakly indicated genital tubercle, receptacles distinctly visible, orifices covered by a broadly ovoid genital flap, slightly curved. Anal segment with big, rounded anal flap. Caudal rami as long as broad, 4 marginal setae on each ramus plus 1 small external (dorsal) seta.

Species Farrania frigida - Plate 7 of morphological figuresissued from : W. Vervoort in Verh. K. ned. Akad. Wet., Afd. Natuurk., 1951, (Sect. 2) 47 (2). [p.63, Fig.36]. As .
Female: a, left A1; b, Md (mandibular palp).
Nota: A1 short, 24 segmented (8th-9th segments fused), reaching as far as the caudal border of the 3rd thoracic segment., but in other specimen they are slightly longer (reaching almost to the end of the thorax) ; A1 are attached to an elevated portion of the ventral surface of the body which might easily pass for the 1st segment.

Species Farrania frigida - Plate 8 of morphological figuresissued from : W. Vervoort in Verh. K. ned. Akad. Wet., Afd. Natuurk., 1951, (Sect. 2) 47 (2). [p.64, Fig.37]. As .
Female: a, right Mx1; b, right Mx2.
Nota: Mx1 with squarish 1st lobe, carrying 9 strong, sabre-like spines, plus 4 smaller setae on the posterior surface ; 2nd and 3rd inner lobe each with 4 setae, the 3rd lobe is spinulose on its posterior surface ; 1st outer lobe small, with 9 setae ; exopod small, with 11 setae ; 2nd basal segment with 5 internal setae (and no spines on its surface as described by Sewell) ; there are 3 well separated segments, the 1st carries 4, the 2nd 5 and the 3rd 7 setae. Mx2 with 5 well developed lobes, there are 3 endopodal segments, the proximal 2 each have 1 seta, the apical has 3 setae (2 strong and 1 small), all these setae are spinulose.

Species Farrania frigida - Plate 9 of morphological figuresissued from : W. Vervoort in Verh. K. ned. Akad. Wet., Afd. Natuurk., 1951, (Sect. 2) 47 (2). [p.66, Fig.38]. As .
Female: a, Md (cutting edge); b, P5 (posterior aspect); c, right A2; d, left Mxp.
Nota: Endopod of A2 slightly longer than the exopod. P5 symmetrical, the proximal segment coalescent with the chitinous ridge on the ventral border ; the internal and external setae of the distal segment are nude.

Species Farrania frigida - Plate 10 of morphological figuresissued from : W. Vervoort in Verh. K. ned. Akad. Wet., Afd. Natuurk., 1951, (Sect. 2) 47 (2). [p.67, Fig.39]. As .
Female: a, right P1 (anterior); b, left P2 (posterior); c, right P3 (posterior); d, right P4 (posterior).

Species Farrania frigida - Plate 11 of morphological figuresIssued from : J.M. Bradford in N.Z. Oceanogr. Inst., 1971, 206, Part 8, No 59. [p.17, Fig.21].
Female (from 79°09'S, 171°00'W): 21, P5.
Scale bar: 100 µm.

Species Farrania frigida - Plate 12 of morphological figuresIssued from : C. Razouls in Ann. Inst. océanogr., Paris, 1994, 70 (1). [p.52]. Caractéristiques morphologiques de Farrania frigida femelle et mâle adultes.
Terminologie et abbréviations: voir à Calanus propinquus.

Compl. Ref.:
Park, 1970 (p.475); Björnberg, 1973 (p.311, 386); Harding, 1974 (p.141, Table 2, gut contents); Deevey & Brooks, 1977 (p.256, tab.2, as frigidus, Station "S"); Hopkins, 1985 (p.197, Table 1, gut contents); Hopkins & Torres, 1988 (tab.1); Hattori, 1991 (tab.1, Appendix); Razouls & al., 2000 (p.343, tab. 5, Appendix); Schnack-Schiel & al., 2008 (p.1045: Tab.2); Medellin-Mora & Navas S., 2010 (p.265, Tab. 2)
NZ: 8

Distribution map of Farrania frigida by geographical zones
Species Farrania frigida - Distribution map 3issued from : W. Vervoort in B.A.N.Z. Antarctic Reseach Expedition, Reports - Ser. B, Vol. III, 1957 [Fig.10].
Chart showing the geographical distribution (white circle) in the seas surrounding the Antarctic continent.
Nota: In this chart the area frequented by whaling vessels has been hatched. The Antarctic circle (66°.5 S) has been drawn as a broken line. The numbers I to VI refer to the sectors into which the Antarctic seas are divided according to Mackintosh (1942) (after Vervoort, 1951).
Antarct. (Croker Passage, Peninsula, Weddell Sea, SW Atlant., South Georgia, SE, Indian, SW Pacif., Ross Sea), Atlant. equatorial (off E St. Paul Ys.), off SW Cape Verde Is., Caribbean Sea, Caribbean Colombia, G. of Mexico, off Bermuda: Station "S" (32°10'N, 64°30'W), Sargasso Sea, off E Cape Cod (42°N, 64°30'W), ? Bay of Biscay, off S Laccadive Is., W Indian, Bay of Bengal, Philippines, China Seas (South China Sea), Japan, off Sanriku, G. of California (? Guaymas Basin), Chile (32° S)
N: 26
(10) F: 2,35-2,25; (25) F: 3-2,6; (29) F: 2,28; (31) F: 2,9; (35) F: 2,88-2,58; (55) F: 2,95-2,88; {F: 2,25-3,00}
Rem.: Meso- to bathypelagic.
Sampling depth (Antarct.) : 500-1000 m. Sargasso Sea: 500-2000 m (Deevey & Brooks, 1977, Station "S"); In a vertical tow from 2000-1000 m (Harding, 1974).
A doubt subsists between the synonymies of F. oblonga and F. frigida, but the geographical distribution pattern strengthens the synonymy.

For Vervoort (1951, p.69) the systematical position of Drepanopsis frigidus Wolfenden, 1911, has been the subject of various speculations in respect of the genus situation. Sars (1920) established the genus Farrania for an Atlantic deep water copepod, which named Farrania oblonga; unfortunately his description and his drawings are of such a character that possibly they are to some extent a reconstruction or restoration of the animal he studied (cf. Farran, 1929, p.232). Sars's genus Farrania certainly is congeneric with Drepanopsis, the latter name having priority. Unfortunately it cannot be decided if both forrms are also identical, but in the author's opinion it seems likely that they are different as the discrepancy in lengths is considerable (Sars's Farrania oblonga measures 3.65 mm); moreover, there are differences in the shape of the cephalothorax, abdomen and length of A1.
R. Stephen: Data sheets of NIO, Kochi, India (on line as Drepanopsis frigidus).
Last update : 24/01/2017
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