Species Card of Copepod
Calanoida ( Order )
    Arietelloidea ( Superfamily )
        Augaptilidae ( Family )
            Euaugaptilus ( Genus )
Euaugaptilus laticeps  (Sars, 1905)   (F,M)
Syn.: Augaptilus laticeps Sars, 1905 c (p.11, Descr.F); Farran, 1908 b (p.72, Rem.); Lysholm & Nordgaard, 1921 (p.26);
no Augaptilus placitus A. Scott, 1909 (p.137, figs.F);
no Augaptilus antarcticus Wolfenden, 1911 (p.334);
no Augaptilus fungiferus : Wolfenden, 1911 (p.187);
no Euaugaptilus laticeps : Farran, 1929 (p.269); Vervoort, 1957 (p.139); Tanaka & Omori, 1967 (p.252)
Ref.:
Sars, 1925 (p.264, figs.F,M); Farran, 1926 (p.289); Sewell, 1932 (p.321); Rose, 1933 a (p.223, figs.F,M); Jespersen, 1940 (p.59); Lysholm & al., 1945 (p.38); Sewell, 1947 (p.209); 1948 (p.504); Tanaka, 1964 b (p.50, figs.F); Vervoort, 1965 (p.136, Rem.); Owre & Foyo, 1967 (p.86, figs.F,M); Matthews, 1972 (p.23, 33: Rem., 60); Tanaka & Omori, 1974 (p.226, figs.M); Roe, 1984 (p.358); Boxshall, 1985 (p.306, Rem.); Park, 1993 (p.30, figs.F, Rem.); Razouls, 1994 (p.170, figs.F,M); Bradford-Grieve & al., 1999 (p.882, 939, figs.F,M); Bradford-Grieve,1999 b (p.54, figs.F,M, Rem., figs.171, 190); Matsuura & Nishida, 2000 (p.339); Vives & Shmeleva, 2007 (p.201, figs.F,M, Rem.)
Species Euaugaptilus laticeps - Plate 1 of morphological figuresissued from : O. Tanaka in Publs Seto Mar. Biol. Lab., 1964, XII (1). [p.50, Fig.197].
Female: a, habitus (dorsal); b, forehead (lateral left side); c, last thoracic segment and urosome (left lateral side); d, masticatory edge of Md; e, Mx1; f, P1; g, P5.


Species Euaugaptilus laticeps - Plate 2 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). NIWA Biodiversity Memoir, 111, 1999. [p.54, Fig.26].
Female: A, habitus (lateral left side); B, idem (dorsal); C, Md (mandibular palp); D, Mx1; E, P1; F, P5.


Species Euaugaptilus laticeps - Plate 3 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). NIWA Biodiversity Memoir, 111, 1999. [p.54, Fig.26].
Male (redrawn from Sars, 1924): G, P5.


Species Euaugaptilus laticeps - Plate 4 of morphological figuresissued from : O. Tanaka & M. Omori in Publs Seto Mar. Biol. Lab., 1974, XXI (3/4). [p.227, Fig.15.
Male: a, forehead (lateral); b, last thoracic segment and urosome (dorsal); c, distal part of A1; ; d, Mx1; e, P5.


Species Euaugaptilus laticeps - Plate 5 of morphological figuresissued from : O. Tanaka & M. Omori in Publs Seto Mar. Biol. Lab., 1974, XXI (3/4). [p.199, Fig.2,e].
Female: e, mandibular teeth.


Species Euaugaptilus laticeps - Plate 6 of morphological figuresIssued from : G.O. Sars in Résult. Camp. Scient. Prince Albert I, 69, pls.1-127 (1924). [Pl.LXXX, figs.1-14].
Female: 1, habitus (dorsal); 2, idem (lateral left side); 3, forehead (lateral); 4, rostrum; 5, A2; 6, Md; 7, Mx1; 8, Mx2; 9, Mxp; 10, P1; 11, P3; 12, P5.

Male: 13, P5; 14, urosome (dorsal).


Species Euaugaptilus laticeps - Plate 7 of morphological figuresissued from : T. Park in Biology of the Antarctic Seas, XXII. Antarct. Res. Ser., Washington, 58. [p.30, Fig.21].
Female: a-b, habitus (dorsal and lateral, respectively); c-d, forehead (lateral and ventral, respectively); e-f, urosome (lateral and dorsal, respectively); g, A2; h, Md; i, Md (biting edge).
Nota: Rostrum consisting of 2 filaments of medium size. Urosome about 26 % length of prosome. Genital segment (dorsally) about 1.1 times as long as wide and about 41 % length of urosome. Measured along lateral side, 3rd urosomal segment about 1.6 times length of 2nd, and about 86 % length of caudal ramus.


Species Euaugaptilus laticeps - Plate 8 of morphological figuresissued from : T. Park in Biology of the Antarctic Seas, XXII. Antarct. Res. Ser., Washington, 58. [p.31, Fig.22].
Female: a, Mx1; b, Mx2; c, Mxp; d-h, P1 to P5 (anterior views).


Species Euaugaptilus laticeps - Plate 9 of morphological figuresissued from : H. Matsuura & S. Nishida in Mar. Biol., 2000, 137. [p.341, Fig.2, A-B].
Female (from eastern Indian and NW Pacific): SEM micrographs of button setae on Mx2 and Mxp: A, subterminal part of a seta; B, transitional part of a seta.
Nota: The discs are semicircular with more or less linear margins on the distal side of a seta. In the button setae the basal-most setules are replaced distally by triangular spines which form two rows on the middle part and change into buttons, arranged side-by-side, more distally. The diameter of the discs is ca. 0.006 mm throuhout the seta, except on the terminal part, where decreases to about half of that of the discs on the more basal part.
Number of button setae on Mx2: 0 on basis, 7 on endopod; on Mxp: 7 on endopod.


Species Euaugaptilus laticeps - Plate 10 of morphological figuresissued from : H.B. Owre & M. Foyo in Fauna Caribaea, 1, Crustacea, 1: Copepoda. Copepods of the Florida Current. 1967. [p.86, Figs.578, 579].
Female: 578, P1; 579, P5.


Species Euaugaptilus laticeps - Plate 11 of morphological figuresissued from : J.M. Bradford-Grieve, E.L. Markhaseva & C.E.F. Rocha & B. Abiahy in South Atlantic Zooplankton, Edit. D. Boltovskoy. 1999. Vol.2. Copepoda. [p.1038, Fig. 7.252].
Female: Mx1.

Nota: Exopod of Mx1 with 6 setae; outer lobe with 7 setae.


Species Euaugaptilus laticeps - Plate 12 of morphological figuresissued from : J.B.L. Matthews in Bull. Br. Mus. (Nat. Hist.) Zool., 1972, 24 (1). [p.24, Fig.10].
Left and right gnathobase of a doubtful specimen of Euaugaptilus laticeps (loan from the Bergen Museum).
Originally identified as RE. nodifrons, probably on account of the absence of rostral filaments, was found to fit the description of E. laticeps in all other respects; the rostral protuberance was distinctly bifid and well developed (it is possible that the filaments had been broken off). Because of doubt over its identity it is included here only in the consideration of mandibular structure, in which it showed some astmmetry. The specimen possesses a typical laticeps gnathobase on one mandible but to have one tooth fewer on the other.
Specimens show the teeth on the gnathobase without variation but there were 5 setae on the exopodite of one specimen and 4 on the other. Sars (1925) figured 5 setae, while Sewell (1947) recorded 4.


Species Euaugaptilus laticeps - Plate 13 of morphological figuresissued from : J.B.L. Matthews in Bull. Br. Mus. (Nat. Hist.) Zool., 1972, 24 (1). [p.25, Table 2].
Differences in setation of Mx1, according to previous descriptions.


Species Euaugaptilus laticeps - Plate 14 of morphological figuresissued from : J.B.L. Matthews in Bull Gr. Mus. (Nat. Hist.) Zool., 1972, 24 (1). [p.25, Table I).
Occurrence of a seta on the posterior surface near the outer margin of basipodite of P1, P4 and P5. Numbers refer to the number of individuals examined.

In the material sxamined by Matthews (1972, p.24) Mx1 from one of the two specimens had 11 setae on the 1st endite and 2 on the 2nd, while these appendages in the other specimen had 10 and 1 respectively. The first specimen also possessed some additional small setae on the exopodite and exite


Species Euaugaptilus laticeps - Plate 15 of morphological figuresIssued from : C. Razouls in Ann. Inst. océanogr., Paris, 1994, 70 (1). [p.170]. Caractéristiques morphologiques de Euaugaptilus laticeps femelle et mâle adultes.
Terminologie et abbréviations: voir à Calanus propinquus.

Compl. Ref.:
Sewell, 1948 (p.330, 504, 508, 525, 530, 533, 547, 549); C.B. Wilson, 1950 (p.205); Grice, 1963 a (p.496); De Decker & Mombeck, 1964 (p.12); Grice & Hulsemann, 1967 (p.18); Itoh, 1970 (tab.1); Roe, 1972 (p.277, tabl.1, tabl.2); Björnberg, 1973 (p.348, 385); Deevey & Brooks, 1977 (p.156, tab.2, Station "S"); Vives, 1982 (p.294); Kovalev & Shmeleva, 1982 (p.85); Guangshan & Honglin, 1984 (p.118, tab.); Hopkins & Torres, 1988 (tab.1); Lozano Soldevilla & al., 1988 (p.60); Suarez & Gasca, 1991 (tab.2); Suarez, 1992 (App.1); Donnelly & al., 1994 (p.171, chemical composition); Shih & Young,1995 (p.68); Suarez-Morales & Gasca, 1998 a (p108); Voronina & Kolosova, 1999 (p.71); Lapernat, 2000 (tabl.3, 4); Razouls & al., 2000 (p.343, tab. 5, Appendix); Holmes, 2001 (p.12); Galbraith, 2009 (pers. comm.); Park & Ferrari, 2009 (p.143, Table 5, Appendix 1, biogeography); Matsuura & al., 2010 (p.2098, Table 2, 3, fig.8)
NZ: 17

Distribution map of Euaugaptilus laticeps by geographical zones
Loc:
Antarct. (Peninsula, Weddell Sea, SW & S Atlant., SW & SE Pacif.), sub-Antarct. (Indian), South Africa (E), Atlant. (tropical, temperate), Ghana, off NW Cape Verde Is., Canary-Azores, off Madeira, G. of Mexico, Florida, off Bermuda (Station "S"), Sargasso Sea, S Iceland, off W Ireland, Bay of Biscay, off W Cabo Finisterre, Iboro-morocan Bay, W Medit., Indian, Laccadive Is., Celebes and Sulu Seas, Philippines, China Seas (East China Sea), Philippines, Japan (Izu region), Vancouver Is., SW Galapagos, N Easter Is., off Peru, Chile, Pacif. (W equatorial), New Zealand (SW, NW & N North Island)
N: 26
Lg.:
(1) F: 7,6; (16) F: 7,2-6,9; M: 6,8-6,3; (38) F: 7,68; (48) F: 7,91-7,5; (68) F: 7,4-7,1; M: 7,3-6,8; (69) F: 7,43; (199) F: 8-6,6; (909) F: 7,4; 7,6; (1066) F: 7,0-7,1; {F: 6,30-8,00; M: 6,30-7,30}
Rem.: meso-bathypelagic. Sargasso Sea: 500-2000 m (Deevey & Brooks, 1977, Station "S");
Park (1993, p.37) considers that E. antarcticus is not synonymous with E. laticeps, contrary to the opinion of Farran (1929) and Matthews (1972).
For Boxshall this species is not synonymous with E. placitus while Sewell as well as Matthews and Bradford-Grieve (1999 b, p.47) do consider synonymy.
For Park (1993, p.32) this species is characteristic in having relatively short rostral filaments, no setae on the first 7 exopodal segments of A2, a mandibular blade which is tapering smoothly into a blunt tooth, and a well-developed Mx1 without an endopod. The species is closely related to E. antarcticus (Wolfenden, 1911) but clearly separable from it in anatomical details of the Md, Mx1, and swimming legs.
For Itoh (1970 a, fig.2, from co-ordonates) the Itoh's index value from mandibular gnathobase = 1100.

In ''squamatus" Group after Matthews (1972, p.64) {See remarks in Euaugaptilus genus}.
Last update : 04/12/2020
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