Species Card of Copepod
Calanoida ( Order )
    Arietelloidea ( Superfamily )
        Augaptilidae ( Family )
            Euaugaptilus ( Genus )
Euaugaptilus rigidus  (Sars, 1907)   (F,M)
Syn.: Augaptilus rigidus Sars, 1907 a (p.21, Descr.F)
Sars, 1925 (p.298, figs.F); Sewell, 1947 (p.198, 199, 200); 1948 (p.505); C.B. Wilson, 1950 (p.207, figs.F); Tanaka, 1964 b (p.72, figs.F); Vervoort, 1965 (p.145, Rem.); Owre & Foyo, 1967 (p.88, figs.F); Matthews, 1972 (p.40); Tanaka & Omori, 1974 (p.201, 198: Fig.F); Roe, 1975 (p.357, Descr.M, figs.M, Rem.); Bradford-Grieve & al., 1999 (p.882, 940, figs.F,M); Vives & Shmeleva, 2007 (p.229, figs.F,M, Rem.)
Species Euaugaptilus rigidus - Plate 1 of morphological figuresissued from : O. Tanaka in Publs Seto Mar. Biol. Lab., 1964, XII (1). [p.73, Fig.210].
Female: a, habitus (dorsal); b, forehead (left lateral side); c, last thoracic segment and urosome (left lateral side); d, rostrum (frontal view); e, Md; f, Mx1; g, Mx2; h, P1; i, P5.

Nota: The urosome segments and furca are in the proportional lengths as 58:9:10:23 = 100. Sars' specimen has the mandible with a rudimentary endopod, the numbers of setae on Mx2 differ also.

Species Euaugaptilus rigidus - Plate 2 of morphological figuresissued from : O. Tanaka & M. Omori in Publs Seto Mar. Biol. Lab., 1974, XXI (3/4). [p.198, Fig.1,i].
Female: i, mandibular teeth.

Species Euaugaptilus rigidus - Plate 3 of morphological figuresIssued from : G.O. Sars in Résult. Camp. Scient. Prince Albert I, 69, pls.1-127 (1924). [Pl.CIII, figs.1-14].
Female: 1, habitus (dorsal); 2, idem (lateral left side); 3, forehead (lateral); 4, rostrum; 5, A2; 6, Md; 7, Md (masticatory edge of the same appendage); 8, Mx1; 9, Mx2; 10, Mxp; 11, P1; 12, P3; 13, P5; 14, urosome (dorsal).

Species Euaugaptilus rigidus - Plate 4 of morphological figuresissued from : C.B. Wilson in U.S. National Museum. Bull.100, 14 (4), 1950. [Pl.7, Fig.62].
Female (from E tropical Pacific): 62, habitus (dorsal).

Species Euaugaptilus rigidus - Plate 5 of morphological figuresissued from : H.S.J. Roe in Bull. British Mus. (Nat. Hist.) Zool., London, 1975, 28 (7). [p.356, Fig.28, i-o].
Male: i, head (dorsal); j, forehead and rostrum (right lateral side); k, last thoracic segment and urosome (lateral side); l, Md; m, Mx1; n, Mx2; o, P5.
Bar scale: 0.1mm unless indicated.
Nota: The slight variation in setation of the Mx2 is not surprising since Matthews (1972) found a considerable degree of intraspecific variation in this genus.

Species Euaugaptilus rigidus - Plate 6 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.1040, Fig. 7.262].
Female: Mx1.

Nota: Exopod with 2 setae; outer lobe 1 with 3 setae; inner lobe 4 withot seta.

Compl. Ref.:
Grice & Hulsemann, 1967 (p.19); Roe, 1972 (p.277, tabl.1, tabl.2); 1972 c (p.1035); Vives, 1982 (p.294); Lozano Soldevilla & al., 1988 (p.60); Heinrich, 1990 (p.18); Fernandes, 2008 (p.465, Tabl.2); Galbraith, 2009 (pers. comm.); Matsuura & al., 2010 (p.2098, Table 2, 3, fig.8)
NZ: 8

Distribution map of Euaugaptilus rigidus by geographical zones
Gulf of Guinea, Cape Verde Is., off Morocco-Mauritania, Canary Is., S Azores Is., Caribbean, Florida, Indian, Bay of Bengal, Celebes and Sulu Seas, Japan, NW Pacif., Vancouver Is., Pacif. (SE tropical), E Peru- Easter Is.
N: 17
(1) F: 4,3; (16) F: 5,5-5,1; M: 4,3; (69) F: 5,45; (199) F: 4,56; {F: 4,30-5,50; M: 4,30}
Rem.: mesopelagic. Known to occur at a depth of 600 m and also below 1000 m (Matthews, 1972).
First occurrence in Indonesian waters by Matsuura & al. (2010).

In ''affinis"" Group after Matthews (1972, p.64) {See remarks in Euaugaptilus genus}
Last update : 05/01/2015
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2024. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed May 29, 2024]

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