Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Aetideidae ( Family )
            Jaschnovia ( Genus )
Jaschnovia brevis  (Farran, 1936)   (F,M)
Syn.: Bradyetes brevis Farran, 1936 b (p.238, Descr.F, figs.F); Jespersen, 1939 (p.46, Rem.); Sewell, 1948 (p.495); Vervoort, 1952 b (n°43, p.3, figs.F); Wheeler, 1970 (p.8);
Derjujinia tolli : M.W. Johnson, 1963 (p.89, Table 1, 2); Shih & al., 1971 (p.201); Vidal, 1971 a (p.17,25,114, figs.F,M);
Jaschnovia johnsoni Markhaseva, 1980 a (p.68, figs.F,M); Hanssen, 1997 (tab.3.1)
Ref.:
Markhaseva, 1996 (p.226, figs.F,M, Notes.p.62)
Species Jaschnovia brevis - Plate 1 of morphological figuresissued from : E.L. Markhaseva in Proc. Zool. Inst. RAN, St. Petersburg, 1996, 268. [p.227, Fig.179].
Female (from Markhaseva, 1980). Gn: genital segment (ventral view).

Nota: Posterior corners of last thoracic segment rounded.
A1 nearly as long as cephalothorax, or reaching thoracic segment 3.


Species Jaschnovia brevis - Plate 2 of morphological figuresissued from : E.L. Markhaseva in Proc. Zool. Inst. RAN, St. Petersburg, 1996, 268. [p.228, Fig.180].
Male (from Markhaseva, 1980).

Nota: Posterior corners of last thoracic segment rounded, not curved externally (dorsal view).
A1 reaching the midlength of genital segment.
P1-P4 as in females, only P4 surface setation weaker.


Species Jaschnovia brevis - Plate 3 of morphological figuresissued from : M.W. Johnson in Limnol. and Oceanogr., 1963, 8 (1). [p.95, Fig.3]. As Derjuginia tolli.
Female (from Polar basin): 7, posterior portion of the bedy with attached spermatophore (lateral); 8, Mx2; 11, P1.
Nota: The specimens differ from tolli in that the female genital segment is much longer and is swollen ventrally, and the 5th thoracic segment is smoothly rounded, not pointed

Male: 9, right P5; 10, left P5.

Nota: The 5th thoracic segment is smooth and bears no spines. The Mx2 bears 3 setae with unusual comb-like processes.


Species Jaschnovia brevis - Plate 4 of morphological figuresissued from : E.L. Markhaseva in issled. Fauny Morei, 1980, XXV (XXXIII). [p.69, Fig.3]. As Jaschnovia johnsoni.
Female (from central Arctic Basin): 1-2, habitus (dorsal and lateral, respectively); 3-4, posterior prosome and urosome (dorsal and left lateral, respectively); 5, genital somite (ventral); 6, A1; 7, A2; 8, Md; 9, Mx1; 10, Mx2; 11, Mxp (protopodite and basis); 12,P1; 13, P4.


Species Jaschnovia brevis - Plate 5 of morphological figuresissued from : E.L. Markhaseva in issled. Fauny Morei, 1980, XXV (XXXIII). [p.70, Fig.4].
Male: 1-2, habitus (dorsal and lateral, respectively); 3-4, posterior prosome and urosome (dorsal and right lateral, respectively).


Species Jaschnovia brevis - Plate 6 of morphological figuresIssued from : V.N. Andronov in Russian Acad. Sci. P.P. Shirshov Inst. Oceanol. Atlantic Branch, Kaliningrad, 2014. [p.85, Fig.22: 13]. Jaschnovia brevis after Markhaseva, 1996.
Male P5.

Compl. Ref.:
Kosobokova & al., 1998 (tab.2); Markhaseva, 1998 (p.250, Fig.4); Lischka & al., 2001 (p.186); Kosobokova & al., 2011 (p.29, Table 2, Rem.: Arctic Basins)
NZ: 1

Distribution map of Jaschnovia brevis by geographical zones
Loc:
Arct. (Basins), E Greenland (72°55'N-25°W; rare, probably close to the bottom), Greenland Sea, Laptev Sea, New Siberian Islands, Chukchi Sea, Beaufort Sea, Nansen Basin, Canada Basin.

Type locality: 72°55'N, 25°W.
N: 11
Lg.:
(37) F: 2,45-2,31; (255) F: 2,31; {F: 2,31-2,45}
Rem.: brackish. ? hyperbenthic, cryopelagic species, also found in under ice hauls (surface) in Arctic Basin.
Last update : 21/04/2016
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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 24, 2021]

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