Euaugaptilus angustus - Species Card - Marine Planktonic Copepods

Euaugaptilus angustus Sars, 1905 (F,M)

Taxonomy

Order Calanoida

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Superfamily Arietelloidea

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Family Augaptilidae

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Genus Euaugaptilus

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Abbreviations or symbols

Synonymy

Augaptilus angustus Sars, 1905 c (p.10, Descr.F); Farran, 1908 b (p.77, Rem.F)

References

List of the studied authors

Sars, 1925 (p.281, figs.F,M); Sewell, 1932 (p.322); Rose, 1933 a (p.229, figs.F,M); Sewell, 1947 (p.197, 199, 201, 222, figs.F, Rem.); Tanaka, 1964 b (p.56, figs.F, Rem.); Vervoort, 1965 (p.140, Rem.); Matthews, 1972 (p.25, 27); Tanaka & Omori, 1974 (p.201, figs.F); Park, 1993 (p.27, figs.F, Rem.); Bradford-Grieve & al., 1999 (p.882, 940, figs.F,M); Vives & Shmeleva, 2007 (p.188, figs.F,M, Rem.); Matsuura & al., 2010 (p.2098, Table 4, fig.10: Mx2, Mxp)

Figures

Plate 1 issued from : O. Tanaka in Publs Seto Mar. Biol. Lab., 1964, XII (1). [p.57, Fig.201].
Female: a, habitus (dorsal); b, forehead (left lateral side); c, rostrum (frontal view); d, last thoracic segment and urosome (left lateral side); e, urosome (ventral); f, A2; g, Md (mandibular palp and biting blade, separately); h, Mx2; i, P1; j, P5.
Nota: The urosome segments and furca are in the proportional lengths as 53:9:11:27 = 100.

Species Euaugaptilus angustus - Plate 2 of morphological figures

Plate 2 issued from : O. Tanaka & M. Omori in Publs Seto Mar. Biol. Lab., 1974, XXI (3/4). [p.202, Fig.4].
Female: a, Mx1.

Male: b, forehead (dorsal); c, last thoracic segment and urosome (dorsal); d, distal part of A1.
Nota: The urosome segments and furca are in the proportional lengths as 25:13:11:11:11:29. Left A1 modified.

Species Euaugaptilus angustus - Plate 3 of morphological figures

Plate 3 issued from : O. Tanaka & M. Omori in Publs Seto Mar. Biol. Lab., 1974, XXI (3/4). [p.200, Fig.3,a].
Female (from Izu region): a, mandibular teeth.

Species Euaugaptilus angustus - Plate 4 of morphological figures

Plate 4 Issued from : G.O. Sars in Résult. Camp. Scient. Prince Albert I, 69, pls.1-127 (1924). [Pl.XCI, figs.1-14].
Female: 1, habitus (dorsal); 2, idem (lateral left side); 3, rostral prominence (ventral view); 4, A2; 5, Md; 6, Mx1; 7, Mx2; 8, Mxp; 9, P1; 10, P3; 11, P5.

Male: 12, forehead (lateral); 13, P5; 14, posterior part of urosome (dorsal).

Species Euaugaptilus angustus - Plate 5 of morphological figures

Plate 5 issued from : R.B.S. Sewell in The John Murray Expedition, 1933-34, Scientific Reports, VIII (1), 1947. [p.224, Fig.60, E].
Female (from N Arabian Sea): E, Mx1.
Nota: The specimenn differs from that figured by Sars in that the 2nd basal segment of Mx1 on one side bears only 2 setae, whereas Sars (1925, fig.6) shows it as having 3. A gland opens on the anterior margin of inner lobe not far from the origin of the most anterior spine.

Species Euaugaptilus angustus - Plate 6 of morphological figures

Plate 6 issued from : T. Park in Biology of the Antarctic Seas, XXII. Antarct. Res. Ser., Washington, 58. [p.28, Fig.19].
Female: a, forehead (lateral); b, genital segment (lateral); c, A2; d, Md; e, Md (biting edge); f, Mx1; g, Mx2; h, Mxp.
Nota: Forehead (laterally) broadly round, with rostrum in the form of a round tubercle, without filaments

Plate 7 issued from : T. Park in Biology of the Antarctic Seas, XXII. Antarct. Res. Ser., Washington, 58. [p.29, Fig.20].
Female: a-e, P1 to P5 (anterior views).

Plate 8 issued from : H. Matsuura, S. Nishida & J. Nishikawa in Deep-Sea Res. II, 2010, 57. [p.2106, Fig.10, g-h].
From Sulu Sea: g, SEM image of button setae on Mx2 and Mxp; h, SEM image of mandible blade.
Nota: Mandible blade like a curved needle and with 4 spiniform teeth (Type-I).

Species Euaugaptilus angustus - Plate 9 of morphological figures

Plate 9 issued 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.
Nota: Sewell mentioned 2 setae present on one side but drew 3, presumably from the other side.

Complementary References

List of the studied authors

Sewell, 1948 (p.331, 504, 522, 533, 547); C.B. Wilson, 1950 (p.204); De Decker & Mombeck, 1964 (p.12); Morris, 1970 (p.2301); Itoh, 1970 (tab.1); Roe, 1972 (p.277, tabl.1, tabl.2); Deevey & Brooks, 1977 (p.156, tab.2, Station "S"); Vives, 1982 (p.294); Kovalev & Shmeleva, 1982 (p.85); Roe, 1984 (p.359); Lozano Soldevilla & al., 1988 (p.60); Lapernat, 2000 (tabl.3, 4); Razouls & al., 2000 (p.343, Appendix); Holmes, 2001 (p.11); Lo & al., 2004 (p.89, tab.1); Fernandes, 2008 (p.465, Tabl.2); Galbraith, 2009 (pers. comm.); Park & Ferrari, 2009 (p.143, Table 5, Appendix 1, biogeography); Matsuura & al., 2010 (p.2098, Table 3, figs.7, 8, vertical distribution); Pillai H.U.K. & al., 2011 (p.239, Table 3, vertical distribution)

Distribution

NZ: 13

Distribution map of Euaugaptilus angustus by geographical zones

Distribution map of Euaugaptilus angustus for the Zone Mediterranean Sea, Black Sea

Distribution map of Euaugaptilus angustus for the Zone Indian Ocean

Distribution map of Euaugaptilus angustus for the Zone China Seas, Vietnam

Distribution map of Euaugaptilus angustus and for the Zone Sub-Antarctic

Additional Maps & Charts

Species Euaugaptilus angustus - Distribution map 6

Map 6 issued from : H. Matsuura, S. Nishida & J. Nishikawa in Deep-Sea Res. II, 2010, 57. [p.2104, Fig.7].
Vertical distribution of Euaugaptilus angustus in the Sulu Sea, compared with those in the Celebes Sea.

Localisations

Geographical glossary

sub-Antarct. (S Australia), South Africa (E), off S Liberia, off NW Cape Verde Is., Canary Is., off Morocco-Mauritania, off Madeira, off Portugal, off W Cape Finisterre, Azores, off W Ireland, off Bermuda: Station ‘’ S’’ (32°10’N, 64°30’W), Sargasso Sea, Medit. (W Basin), Arabian Sea, Laquedive Is., Indian, Bay of Bengal, Andaman Sea (Batten Island), Celebes and Sulu Seas, China Seas (East China Sea), off Taiwan, Taiwan (N: Mienhua Canyon), Japan (Izu), Pacif. (tropical), off N Hawaii, Vancouver Is., SW Galapagos, N Easter Is., off Peru.

Quotations

N: 22

Dimensions (mm)

References of the authors concerning dimensions

(1) F: 7,9; (16) F: 6,1; (48) F: 4,66; (68) F: 7,83-5,91; M: 5,48; (69) F: 6,47; (199) F: 5,76-5,44; M: 5,12; {F: 4,66-7,90; M: 5,12-5,48}

Remarks

Meso-bathypelagic. Known to occur between 600 and 1400 m depth after Matthews (1972, p.27).
Sampling depth (sub-Antarct.) : 0-1000 m. Overall Depth Range in Sargasso Sea: 500-2000 m (Deevey & Brooks, 1977, Station "S");
For Park (1993, p.29) this species can be recognized by the round tubercular rostral process without filaments, the long A1, the presence of setae on each of the 8 exopodal segments of the A2, the absence of a basal spine on the mandibular gnathobase, and the presence of only 1 outer spine on the 3rd exopodal segment of P1.
For Itoh (1970 a, fig.2, from co-ordonates) the Itoh's index value from mandibular gnathobase = 2150.

In ''squamatus" Group after Matthews (1972, p.64) {See remarks in Euaugaptilus genus}.

Last update : 04/12/2020

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