Arietellus giesbrechti - Species Card - Marine Planktonic Copepods

Arietellus giesbrechti Sars, 1905 (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

no Arietellus giesbrechti : Tanaka, 1964 c (p.231, figs.F)

References

List of the studied authors

Sars, 1905 c (p.21, Descr.F); 1925 (p.331, figs.F,M); Farran, 1908 b (p.82, Rem.); Lysholm & al., 1945 (p.40); Sewell, 1947 (p.233, figs.F,M, Rem.); C.B. Wilson, 1950 (p.167, fig.F); Grice, 1962 (p.226, fig.M); Vervoort, 1965 (p.151, Rem.); Owre & Foyo, 1967 (p.90, figs.F,M); Guangshan & Honglin, 1997 (p.399, Rem.); Chihara & Murano, 1997 (p.720, Pl.: 55: F,M); Bradford-Grieve & al., 1999 (p.881, 937, figs.F,M); Vives & Shmeleva, 2007 (p.148, figs.F,M)

Figures

Plate 1 Issued from : G.O. Sars in Résult. Camp. Scient. Prince Albert I, 69, pls.1-127 (1924). [Pl.CXIX, figs.1-6].
Female: 1, habitus (dorsal); 2, forehead (lateral); 3, P5.

Male: 4, habitus (dorsal); 5, left A1; 6, P5.

Species Arietellus giesbrechti - Plate 2 of morphological figures

Plate 2 issued from : R.B.S. Sewell in The John Murray Expedition, 1933-34, Scientific Reports, VIII (1), 1947. [p.235, Fig.63].
Female (fromS Arabian Sea): A, posterior thoracic segments (lateral right side); B, A1; C, A2; D, Md; E, Mx1; G, Mx2; H, Mxp; I, Mxp (one of the spines, enlarged); J, P1; K, P3; L, P5.
Nota: The proportional lengths of the various segments of the body (cephalon to caudal rami) as 382:140:94:89:65:72:37:33:37:51 = 1000. The body is plentifully supplied with cutaneous glands, which are particularly numerous in the postero-lateral region of the fused 4 th-5th thoracic segments. A1 19-segmented (segments 1 and 2 fused, 8, 9 and 10 partly fused, 12-13 almost completely fused, 21-25 fused, and the surface of the combined segment is covered with very fine punctuations). In Mx1 the endopod is represented by a small, rounded swelling.

Male (from Central area of Arabian Sea): F, Mx2; M, P5.
Nota: The proportional lengths of the various segments of the body (cephalon to caudal rami) as 381:143:88:85:64:51:31:31:28:37:61 = 1000. Head and 1st pediger segment separate, 4th and 5th fused. Left A1 19-segmented (segments 1-2, 19-20, 21-25 fused, the distal half of segments 19-20 and the whole of 21-25 finely punctate) modified to form a grasping organ. The strong setae from the distal portion of both the Mx2 and the Mxp bear a row of flattened platelets each terminating in a short spine (as figured by Esterly, 1905, fig.42c, in A. setosus). P5 appear to resemble those of A. plumifer Sars more nearly than the figure given by Sars for A. giesbrechti.

Species Arietellus giesbrechti - Plate 3 of morphological figures

Plate 3 issued from : G.D. Grice in Fish. Bull. Fish and Wildl. Ser., 1962, 61. [p.227, Pl.27, Fig.5].
Male (from 00°00', 149°38'W): 5, P5.
Nota: The left posterior thoracic margin is slightly longer than the right.

Species Arietellus giesbrechti - Plate 4 of morphological figures

Plate 4 issued from : L. Guangshan & Q. Honglin in Acta Oceanologica Sinica, 16 (3). [p.399, Table 1].
Female : morphological characters in Arietellus giesbrechti.

Nota: Compare with A mohri and A. unisetosus.

Complementary References

List of the studied authors

Sewell, 1948 (p.329, 505, 522, 528, 531); De Decker & Mombeck, 1964 (p.11); De Decker, 1968 (p.45); Grice & Hulsemann, 1968 (tab.2); Roe, 1972 (p.277, tabl.1, tabl.2); Deevey & Brooks, 1977 (p.156, tab.2, Station "S"); Stephen & Rao, 1980 (p.242); Vives, 1982 (p.294); Madhupratap & Haridas, 1986 (p.105, tab.1); Lozano Soldevilla & al., 1988 (p.60); Suarez-Morales & Gasca, 1998 a (p108); Lapernat, 2000 (tabl.3, 4); Fernandes, 2008 (p.465, Tabl.2); Galbraith, 2009 (pers. comm.)

Distribution

NZ: 9

Distribution map of Arietellus giesbrechti by geographical zones

Distribution map of Arietellus giesbrechti for the Zone Indian Ocean

Additional Maps & Charts

Map 3 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

South Africa (E & W), Namibia, Dakar, off NW Cape Verde Is., Canary Is., off N Azores, Portugal, Baie Ibero-morocco Bay, G. of Guinea, Brazil S, off Amazon, Caribbean, G. of Mexico, Sargasso Sea, off Bermuda: Station ‘’ S’’ (32°10’N, 64°30’W), Arabian Sea, Indian, Bay of Bengal, Philippines, Japan (Izu), Vancouver Is., Pacif. (equatorial), E Pacif., off Peru, NE Easter Is., off Juan Fernandez Is.

Quotations

N: 23

Dimensions (mm)

References of the authors concerning dimensions

(1) F: 4,7; (11) F: 5,53-5,16; M: 4,67; (16) F: 5,7-4,73; M: 5,35-5,28; (101) M: 4,75; (199) F: 4,86; {F: 4,70-5,70; M: 4,67-5,35}

Remarks

mesopelagic. Overall Depth Range in Sargasso Sea: 500-1000 m (Deevey & Brooks, 1977, Station "S");
For Heinrich (1996, p.1779), the species cited by Sewell (1947) would be synonym to Arietellus plumifer.
R. Stephen: Data sheets of NIO, Kochi, India (on line).

Morphological characteristics of females:
- Corners of the last thoracic segment pointed, not divergent, symmetrical, left one longer.
Forehead rounded, without point.
- Caudal setae short.

Last update : 07/01/2017

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