Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Euchaetidae ( Family )
            Paraeuchaeta ( Genus )
Paraeuchaeta propinqua  (Esterly, 1906)   (F)
Syn.: Euchaeta propinqua Esterly, 1906 a (p.61, Descr.F, figs.F); Davis, 1949 (p.37, figs.F); Vervoort, 1957 (p.77);
Pareuchaeta propinqua : Brodsky, 1950 (1967) (p.212, figs.F)
A. Scott, 1909 (p.71, figs.F); Sewell, 1913 (p.354); 1948 (p.553, 556, 562); Bradford & al., 1983 (p.23); Park, 1994 (p.320); 1995 (p.51, Rem.F, figs.F)
Species Paraeuchaeta propinqua - Plate 1 of morphological figuresissued from : T. Park in Bull. Scripps Inst. Oceanogr. Univ. California, San Diego, 1995, 29. [p.153, Fig.43].
Female: a, forehead (left side); b, urosome; c, genital somite (left); d, outer lobe of Mx1; e, P1 (anterior); f, P2 (anterior).

Nota: Very similar in habitus including rostrum to P. plaxiphora, but different from it in shape of urosome including genital somite.
Laterally, genital somite with a depth-length ratio of 100:124, its dorsal wall nearly straight without a noticeable hump. Genital flange high, with ventral margin only slightly emarginate. Measured along posterior margin, genital flange almost as high as rest of genital prominence. Posterior edge of genital field produced into a small conical process. Posterior margin of prominence sloping about 50° with respect to long body axis and about as long as posterior ventral wall of somite; they together forming a rather sharp curve.
Cephalosomal appendages including Mx1 as in P. plaxiphora.
Swimming legs similar to thise of P. plaxiphora excepet in P1 exopod, outer spine of 1st segment reaching 2/3 way to base of following outer spine, which is reaching close to base of outer spine of 3rd segment.
In P2, outer spine of 2nd exopodal segment reaching base of following outer spine.

Species Paraeuchaeta propinqua - Plate 2 of morphological figuresissued from : A. Scott in Siboga-Expedition, 1909, XIX a. [Plate XVII, Figs.13-20].
Female (from Banda Sea): 13, habitus (dorsal); 14, forehead (lateral); 15, last thoracic and genital segments (left side); 16, A1; 17, part of one of the distal hairs of Mxp; 18, P1; 19, P2; 20, part of terminal spine (exopodite of P3.

Species Paraeuchaeta propinqua - Plate 3 of morphological figuresissued from : C.O. Esterly in Univ. Calif. Publs Zool., 1906, 3 (5). [Pl.9, Fig.9]. As Euchaeta propinqua.
Female (from San Diego, California): 9, forehead (lateral).

Species Paraeuchaeta propinqua - Plate 4 of morphological figuresissued from : C.O. Esterly in Univ. Calif. Publs Zool., 1906, 3 (5). [Pl.10, Figs.30, 33]: As Euchaeta propinqua.
Female: 30, genital segment (ventral)]; 33, last thoracic segment and genital segment (lateral).

Species Paraeuchaeta propinqua - Plate 5 of morphological figuresParaeuchaeta propinqua Female:
1 - See key to species Groups and independent species of Paraeuchaeta (p.30): malayensis species Group.
2 - Outer spine of 2nd exopodal segment (or the 2nd of the first 2 exopodal segments forming a proximal, compound segment) of P1 normally developed (Fig.43-e).
3 - Outer lobe of Mx1 with 7 large distal setae extending laterad and 2 medium-sized, densely plumose proximal setae extending proximad along lateral side of appendage (Fig.43-d).
4 - Genital segment without 2 conspicuous conical processes on left side at anterior base of genital prominence (Fig.43-c).
5 - Laterally, rostrum triangular with wide base (Fig.43-a).
6 - Laterally, posterior ventral wall of genital somite strongly obique to long axis of somite (Fig.43-c).

Compl. Ref.:
in CalCOFI regional list (MDO, Nov. 2013; M. Ohman, comm. pers.)
NZ: 2

Distribution map of Paraeuchaeta propinqua by geographical zones
? [off Sri Lanka (in Sewell, 1913, p.354), Banda Sea (in A. Scott, 1909], off California, off Chile
N: 7
(3) F: 9; (5) F: 10; (17) F: 9; {F: 9,00-10,00}
Rem.: Bathypelagic.
Park (1995) does not retain the locality records for the Indo-malaysian region.
Park (1995, p.51) collected the species from 1000-0 m at 35°S, 74°W off Chile, and compared with Esterly's original specimen to verify the identity.
Last update : 27/01/2015
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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 October 20, 2021]

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