Species Card of Copepod
Calanoida ( Order )
    Eucalanoidea ( Superfamily )
        Eucalanidae ( Family )
            Pareucalanus ( Genus )
Pareucalanus langae  (Fleminger, 1973)   (F,M)
Syn.: Eucalanus langae Fleminger, 1973 (p.969, 978, 979, 996, 998, figs.F, fig.17); Geletin, 1976 (p.83); Van der Spoel & Heyman, 1983 (p.42, fig.54);
Eucalanus attenuatus : Bradford, 1970 a (p.353, figs.F,M, Rem..).
Bradford-Grieve, 1994 (p.80, figs.F,M, fig. 100); Bradford-Grieve & al., 1999 (p.878, 912, figs.F,M); Goetze, 2003 (p.2322 & suiv.); Goetze & Ohman, 2010 (p.2110, Table 1, A1, Fig.15, molecular study, biogeography)
Species Pareucalanus langae - Plate 1 of morphological figuresissued from : J.M. Bradford-Grieve in The Marine Fauna of New Zealand: Pelagic Calanoid Copepoda. National Institute of Water and Atmospheric Research (NIWA). New Zealand Oceanographic Institute Memoir, 102, 1994. [p.81, Fig.43].
Female (from Fleminger, 1973, p.991, fig.15 b. As Eucalanus langae): A, habitus (dorsal and lateral pattern of integumental organs (black point = sites occuring at 100% frequency, o = 80-99% frequency, x = 10-79% frequency, triangle are sites which are also visible in lateral view but which are assigned to dorsal sets). Female (from south-west Pacific): B, habitus (dorsal); C, urosome (dorsal); D, genital segment (lateral right side); E, Md (mandibular palp).

Male (from Fleminger, 1973, p.994, Fig.18p. As Eucalanus langae): F, urosome and P5 (lateral right side).

Species Pareucalanus langae - Plate 2 of morphological figuresissued from : A. Fleminger in Fishery Bull. natn. Ocean. Atmos. Adm., 1973, 71 (4). [p.968, Fig.1, t (p.969). As Eucalanus langae.
Female: t, genital segment (lateral right side).

Species Pareucalanus langae - Plate 3 of morphological figuresissued from : A. Fleminger in Fishery Bull. natn. Ocean. Atmos. Adm., 1973, 71 (4). [p.994, Fig.18]. As Eucalanus langae.
Female (from 32°29'S, 09°04'E): h, forehead (ventral)

Male (31°11'S, 00°56'E): p, urosome and P5 (lateral right side).

Species Pareucalanus langae - Plate 4 of morphological figuresissued from : A. Fleminger in Fishery Bull. natn. Ocean. Atmos. Adm., 1973, 71 (4). [p.991, Fig.15 Ab, Bb]. As Eucalanus langae.
Female: a, habitus (dorsal); a', idem (lateral right side).
Dots represent sites occuring at a frequency of 100% in the pooled sample of the species, open circles are sites appearing in 80 to 99%, crosses are sites occupied in from 10 to 79%. Open triangles are sites also visible in lateral view but assigned to tergal sets.

Species Pareucalanus langae - Plate 5 of morphological figuresissued from : J.M. Bradford in N.Z. Jl Mar. Freshw. Res., 1970, 4 (4). [p.352, Figs 6-9]. As Eucalanus attenuatus.
Female (off Kaikoura, New Zealand): 9, urosome (dorsal).

Male: 6, Md (mandibular palp); 7, P5; 8, urosome (dorsal).

Scale bars represent 0.1 mm.

Nota: The New Zealand specimens differ from Giesbrecht's (1892) description in details of the mandibular palp: basipod 2 bears 4 small setae; the endopod of segment 1 has 2 small setae, segment 2 has 5 setae (2 of which are slenderer than the rest). The females and stage V males from New Zealand only the anal segment is hairy and the adult males have a naked urosome.

Compl. Ref.:
Hsiao & al., 2004 (p.325, tab.1); Lan & al., 2004 (p.332, tab.1); Dur & al., 2007 (p.197, Table IV, as Paraeucalanus langae : lapsus calami); Schnack-Schiel & al., 2010 (p.2064, Table 2: E Atlantic subtropical/tropical); Hsiao S.H. & al., 2011 (p.475, Appendix I); Jerez-Guerrero & al., 2017 (p.1046, Table 1: temporal occurrence)
NZ: 8

Distribution map of Pareucalanus langae by geographical zones
Species Pareucalanus langae - Distribution map 2issued from : A. Fleminger in Fishery Bull., 1973, 71 (4). [p.993, Fig.17]. As Eucalanus attenuatus.

Geographical localities of the species in the attenuatus group. All identifications except those of Park (1968) and Bradford (1970) verified by examination of integumental organs.
Species Pareucalanus langae - Distribution map 3Issued from : E. Goetze & M.D. Ohman in Deep-Sea Res. II, 2010, 57. [p.2125, Fig.15].
Biogeographic distribution of Pareucalanus langae, a circumglobal transition zone species in the southern hemisphere.
Solid circles mark sampling locations of specimens whose species identity was verified by DNA sequencing of 165 rRNA.
Fleminger (1973) records of this species are plotted as open squares. Lang records of 'cold-water form' specimens are plotted.
South Africa, SE Atlant., S Indian, China Seas (East China Sea, South China Sea), Taiwan (SW, E, NW, N: Mienhua Canyon), Bahia Cupica (Colombia), New Zealand, S Pacif., off Chile,
N: 12
(79) F: 7,22-6,44; M: 6,59-6,12; (313) F: 6,6; 6,7; M: 6,35; 6,30; {F: 6,44-7,22; M: 6,12-6,59}
Rem.: epipelagic - ?.
For Fleminger (1973, p.996) It is difficult to discriminate between P. parki and P. langae in size and appearance including the occurrence of 4 setae on the mandibular basis. Assignment of the sibling populations langae and parki is based on two lines of evidence: 1- significant differences in designated integumental sites involving abdominal segments that undergo modifications with sexual maturation; 2- apparent restriction of each population to temperate zones in opposite hemispheres (see chart above).
According to Bradford-Grieve (1994, p.82) the Southwest Pacific specimens have urosome segments 4-5 ornamented with hairs.

After Hsiao & al. (2004, p.329) thie species is new to the East region of Taiwan.
Last update : 14/06/2022
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2022. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed August 18, 2022]

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