Arietellus setosus - Species Card - Marine Planktonic Copepods

Arietellus setosus Giesbrecht, 1892 (F,M)

Taxonomy

Order Calanoida

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Superfamily Arietelloidea

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Family Arietellidae

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Genus Arietellus

details list species for this Genus

Abbreviations or symbols

Synonymy

? Arietellus setosus : Esterly, 1911 (p.335, figs.M)

References

List of the studied authors

Giesbrecht, 1892 (p.415, Descr.M, figs.M); 1897 b (p.254); Giesbrecht & Schmeil, 1898 (p.124); Esterly, 1905 (p.189, figs.F); A. Scott, 1909 (p.142, figs.F,M); Wolfenden, 1911 (p.329, fig.F); Pesta, 1920 (p.535); Sars, 1925 (p.328, figs.F,M); Farran, 1929 (p.269); Rose, 1929 (p.36); Candeias, 1926 (1929) (p.40, figs.F:?); Farran, 1929 (p.210, 269, Rem.); Sewell, 1932 (p.329); Rose, 1933 a (p.239, figs.F,M); Jespersen, 1934 (p.116); 1940 (p.63); Wilson, 1942 a (p.171, figs.F,M); Lysholm & al., 1945 (p.40); C.B. Wilson, 1950 (p.168, figs.F,M); Brodsky, 1950 (1967) (p.395, figs.F,M); Grice, 1962 (p.226, figs.M); Vervoort, 1965 (p.153, Rem.); Owre & Foyo, 1967 (p.90, figs.F,M); Mazza, 1967 (p.203, figs.F,M, juv.); Park, 1968 (p.566, Rem.); Razouls, 1972 (p.95, Annexe: p.83); Björnberg & al., 1981 (p.654, figs.F,M); Schnack, 1989 (p.137, tab.1, fig.6: Md); He & al., 1992 (p.250); Ohtsuka & al., 1994 (p.131, Rem.M, figs.M); Heinrich, 1996 (p.1782, figs.F); Chihara & Murano, 1997 (p.720, Pl.: 54: F); Bradford-Grieve & al., 1999 (p.882, 937, figs.F,M); Boxshall & Halsey, 2004 (p.63: fig.M); Vives & Shmeleva, 2007 (p.152, figs.F,M)

Figures

Plate 1 issued from : S. Ohtsuka, G.A. Boxshall & H.S.J. Roe in Bull. nat. Hist. Lond. (Zool.), 1994, 60 (2). [p.132, Fig.16, J].
Male (off Mauritania): J, endopod of Mx1.
Nota: endopod of Mx1 represented by unarmed, small knob.
Scale bar in mm.

Species Arietellus setosus - Plate 2 of morphological figures

Plate 2 issued from : S. Ohtsuka, G.A. Boxshall & H.S.J. Roe in Bull. nat. Hist. Lond. (Zool.), 1994, 60 (2). [p.134, Fig.18, I,M].
Male: I, 4th to 6th endopod segments of Mxp; M, left endopod of P5.
Scale bars in mm.
Nota: Exopod of A2 indistinctly 7-segmented (setal formula: 0, 1, 1, 1, 1, 0, 3, respectively). 1st exopod segment of Md with normally developed seta. endopod of Mx1 represented by unarmed, small knob. P5 with left endopod (Fig.18 M) indistinctly 2-segmented, 1st segment produced ventrally to rounded tip, 2nd segment rising from inner side of 1st segment; terminal spine on 3rd exopod segment of left leg almost completely fused to segment, subterminal spine incompletely coalesced with segment; distal compound exopod segment of right leg unarmed.

Species Arietellus setosus - Plate 3 of morphological figures

Plate 3 issued from : A.K. Heinrich in Zool. Zh., 1996, 75 (12). [p.1782, Fig.5].
Female (from SW Indian Ocean): 1, habitus (dorsal); 2, forehead (lateral); 5-6, idem (variant, 6: abnormal); 7, last thoracic segment and urosome (dorsal); 8-9, postrolateral corners of last thoracic segment (left side and right side, respectively); 10, P5; 11, idem (abnormal); 12, endopodite of abnormal P5.
Scale bars in mm: 1.0 (1, 7-9); 0.100 (2-6, 10-12).

Species Arietellus setosus - 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.CXVIII, figs.1-16].
Female: 1, habitus (dorsal); 2, idem (lateral lef side); 3, forehead (lateral); 4, rostrum; 5, A1; 6, A2; 7, Md; 8, Mx1; 9, Mx2; 10, Mxp; 11, P1; 12, P3; 13, P4; 14, P5.

Male: 15, P5; 16, distal part of urosme and caudal rami (dorsal).

Species Arietellus setosus - Plate 5 of morphological figures

Plate 5 issued from : A. Scott in Siboga-Expedition, 1909, XIX a. [Plate XLIV, Figs.8-13].
Male (from Molucca Passage and Banda Sea): 8, habitus (dorsal); 9, forehead (lateral); 10, last thoracic and genital segments (left side); 11, P5.

Female (after Esterly), 1905: 12, habitus (dorsal); 13, P5.

Species Arietellus setosus - Plate 6 of morphological figures

Plate 6 issued from : R.N. Wolfenden in Die Marinen Copepoden der Deutschen Südpolar-Expedition 1901-1903, 1911. [Pl.XXXVI, Fig.3].
Female: habitus (dorsal).

Species Arietellus setosus - Plate 7 of morphological figures

Plate 7 Issued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. – Fauna Flora Golf. Neapel, 1892. Atlas von 54 Tafeln. [Taf.29, Figs.3, 4, 5, 6].
Male: 3, right A1 (distal segments); 4, Md (inner view); 5, Md (mandibular palp; outer view); 6, Md (biting edge).

Plate 8 Issued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. – Fauna Flora Golf. Neapel, 1892. Atlas von 54 Tafeln. [Taf.29, Fig.21].
Male: 21, A2 (anterior view). Re = exopod.

Species Arietellus setosus - Plate 9 of morphological figures

Plate 9 Issued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. – Fauna Flora Golf. Neapel, 1892. Atlas von 54 Tafeln. [Taf.29, Fig.10].
Male: 10, Mx1 (posterior view).

Species Arietellus setosus - Plate 10 of morphological figures

Plate 10 Issued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. – Fauna Flora Golf. Neapel, 1892. Atlas von 54 Tafeln. [Taf.29, Figs.12, 13].
Male: 12, Mxp (anterior view); 13, Mx2 (posterior view).

Species Arietellus setosus - Plate 11 of morphological figures

Plate 11 Issued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. – Fauna Flora Golf. Neapel, 1892. Atlas von 54 Tafeln. [Taf.29, Figs.7, 9, 11].
Male: 7, P2 (anterior view); 9, P5 (anterior view); 11, P1 (anterior view). Ps = left leg; Pd = right leg.

Species Arietellus setosus - Plate 12 of morphological figures

Plate 12 Issued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. – Fauna Flora Golf. Neapel, 1892. Atlas von 54 Tafeln. [Taf.39, Fig.36]
Male: 36, habitus (dorsal)

Species Arietellus setosus - Plate 13 of morphological figures

Plate 13 Issued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. – Fauna Flora Golf. Neapel, 1892. Atlas von 54 Tafeln. [Taf.39, Figs.34, 35]
Male: 34, head (lateral) with rostrum (R); 35, anal segment and caudal rami (dorsal).

Plate 14 issued from : C.O. Esterly in Univ. Calif. Publs Zool., 1911, 6 (14). [Pl.27, Figs.22, 23]. With doubt.
Male: 22, forehead (lateral); 23, habitus (lateral).

Species Arietellus setosus - Plate 15 of morphological figures

Plate 15 issued from : C.O. Esterly in Univ. Calif. Publs Zool., 1911, 6 (14). [Pl.30, Figs.81-82]. With doubt.
Male: 81-82, P5.

Species Arietellus setosus - Plate 16 of morphological figures

Plate 16 issued from : C.O. Esterly in Univ. Calif. Publs. Zool., 1905, 2 (4). [p.190, Fig.42].
Female (from San Diego Region): a, habitus (dorsal); b, P5; c, distal portion of one of the bristles of Mx2.

Plate 17 issued from : G.D. Grice in Fish. Bull. Fish and Wildl. Ser., 1962, 61. [p.227, Pl.27, Figs.1-4].
Male (from 01°10'S, 134°57'W): 1-2, habitus (dorsal and lateral, respectively); 3, posterior part of thorax and urosome (dorsal); 4, P5.
Nota: The posterior thoracic margins are widely divergent. The forehead terminates in an acute point.

Species Arietellus setosus - Plate 18 of morphological figures

Plate 18 issued from : S.B. Schnack in Crustacean Issue, 1989, 6. [p.143, Fig.6: 15].
15, Arietellus setosus (from off NW Africa, upwelling region): Cutting edge of Md.

Species Arietellus setosus - Plate 19 of morphological figures

Plate 19 Issued from : J.M. Bradford-Grieve in NIWA Biodiversity Mem. 111, 1999.[p.30, Fig.8].
Male: (After Giesbrecht, 1892): A, dordsal); B, head (lateral); C, posterior urosome (doesal); D, left A2; E, right A1 terminal part; F, A2; G, Md; H, mandibular palp; I, distal end of Md blade; J, Mx1; K, Mx2; L, Mxp; M, P1; N, P5.

Species Arietellus setosus - Plate 20 of morphological figures

Plate 20 Issued from : J.M. Bradford-Grieve in NIWA Biodiversity Mem. 111, 1999.[p.29, Fig.7].
Female (after Sars, 1924): A-B, habitus (dorsal and lateral, respectively); C, forehead (lateral); D, rostrum; E, posterior urosome (dorsal); F, A1; G, A2; H, Md; I, Mx1; J, Mx2; K, Mxp; L, P1; M, P3; N, P4; O, P5.

Nota: Forehead narrow terminating in a short conical projection which is poineted at its end.
- Posterolateral corners of last thoracic segment strongly projecting on both sides and terminating in a point with is directed obliquely outwards.
- A1 extends almost as far as posterior corners of prosome.
- Genital segment short.
- Caudal rami slightly lamelliform with extremely long, slender setae some of which are almost as long as entire body

Complementary References

List of the studied authors

Sewell, 1948 (p.350, 505, 509, 512, 514, 517, 526, 548, 549, 559); Grice & Hart, 1962 (p.287, 293: Rem.); De Decker & Mombeck, 1964 (p.11); Mazza, 1966 (p.72); Fleminger, 1967 a (tabl.1); Grice & Hulsemann, 1968 (tab.2); Vinogradov, 1968 (1970) (p.195, 268); Morris, 1970 (p.2301); Deevey, 1971 (p.224); Roe, 1972 (p.277, tabl.1, tabl.2); Bainbridge, 1972 (p.61, Appendix Table III: occurrence); Björnberg, 1973 (p.349, 386); Vives & al., 1975 (p.52, tab.II); Deevey & Brooks, 1977 (p.156, tab.2, Station "S"); Carter, 1977 (1978) (p.36); Stephen & Rao, 1980 (p.242); Vives, 1982 (p.294); Kovalev & Shmeleva, 1982 (p.85); Scotto di Carlo & al., 1984 (1044); Guangshan & Honglin, 1984 (p.118, tab.); Madhupratap & Haridas, 1986 (p.105, tab.1); Scotto di Carlo & al., 1991 (p.271); Seguin & al., 1993 (p.23); Shih & Young, 1995 (p.67); Hure & Krsinic, 1998 (p.102); Suarez-Morales & Gasca, 1998 a (p108); Pakhomov & al., 2000 (p.1663, Table 2, transect Cape Town-SANAE antarctic base); Holmes, 2001 (p.14); Vukanic, 2003 (p.139, tab.1); Hsiao & al., 2004 (p.325, tab.1: as Arietella setosus); Galbraith, 2009 (pers. comm.); Schnack-Schiel & al., 2010 (p.2064, Table 2: E Atlantic subtropical/tropical); Mazzocchi & Di Capua, 2010 (p.423); Andersen N.G. & al., 2011 (p.71, Fig.3: abundance); in CalCOFI regional list (MDO, Nov. 2013; M. Ohman, pers. comm.); Lidvanov & al., 2013 (p.290, Table 2, % composition); El Arraj & al., 2017 (p.272, table 2, spatial distribution); Belmonte, 2018 (p.273, Table I: Italian zones)

Distribution

NZ: 18

Distribution map of Arietellus setosus by geographical zones

Distribution map of Arietellus setosus for the Zone Mediterranean Sea, Black Sea

Distribution map of Arietellus setosus for the Zone Indian Ocean

Distribution map of Arietellus setosus for the Zone China Seas, Vietnam

Additional Maps & Charts

Map 5 issued from : R. Stephen & T.S.S. Rao in J. Plankton Res., 1980, 2 (2). [p.242, Fig.1].
Distribution of Arietellus and Paraugaptilus in the Indian Ocean (open circles indicate the stations selected for the study).

Localisations

Geographical glossary

sub-Antarct. (in Björnberg, 1973, p.384), South Africa (E), Atlant. (tropical), S Brazil, G. of Guinea, off Lagos, off Morocco-Mauritania, Moroccan coast, Canary Is.- Azores, off N Azores, Portugal, Bay of Bicay, off W Ireland, N Scotland, Strait of Davis, S Iceland, off Amazon, Barbada Is., Yucatan, Florida, Sargasso Sea, off Bermuda (Station "S"), Ibero-morocco Bay, Medit. (Alboran Sea, Banyuls, Ligurian Sea, Tyrrhenian Sea, Strait of Messina, Adriatic Sea, Ionian Sea), Natal, S Madagascar, Indian, Indonesia-Malaysia, Philippines, China Seas (East China Sea, South China Sea), Japan (Honshu), off SE Hokkaido, Vancouver Is., California, Pacif. (W equatorial), New Zealand, Pacif. (equatorial), NE Marquesas Is., off Hawaii (N & NE), off Ecuador, off Juan Fernandez Is., N Chile

Quotations

N: 75

Dimensions (mm)

References of the authors concerning dimensions

(1) F: 4,9; (5) M: 4; (10) F: 4,75-4,6; (16) M: 4,45-4,2; (35) F: 5,08; M: 4,2-4,02; (46) M: 4,25; (47) F: 4,6; (71) M: 4,28; (72) M: 4,12-3,93; (101) M: 3,99; (142) F: 5,5; (143) M: 6,2; (199) M: 3,95; (207) F: 4,6-4,27; M: 4,03-3,99; (449) F: 4,6; M: 4,25; (852) F: 4,87-5,05; {F: 4,27-5,50; M: 3,93-6,20}

Remarks

epi-meso-bathypelagic. Sargasso Sea: 0-1500 m (Deevey & Brooks, 1977, Station "S");
After Esterly (1911, p.336) P5 of the San Diego specimens show slight difference as compared with the figures of Giesbrecht (1892, Taf.29, fig.9), but they are not sufficient to warrant a specific distinction.
For Schnack (1989) the Itoh's index value from mandibular gnathobase = 2830.

Morphological characteristics of females:
- Corners of the last thoracic segment pointed, symmetrical, divergent.
- Forehead pointed in dorsal view.
- Caudal setae very elongated, feathery.

Last update : 25/10/2022

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