Oithona hamata - Species Card - Marine Planktonic Copepods

Oithona hamata Rosendorn, 1917 (F)

Taxonomy

Order Cyclopoida

details

Family Oithonidae

details

Genus Oithona

details list species for this Genus

Abbreviations or symbols

References

List of the studied authors

Rosendorn, 1917 (p.302); 1917 a (p.15, figs.F); Kiefer, 1929 g (p.5, Rem.F); Sewell, 1948 (p.430); Lindberg, 1955 a (p.465: Rem.); Wellershaus, 1970 (p.484, Rem.F); Kos, 1972 (Vol.I, figs.F, Rem.); Shuvalov, 1980 (p.101, figs.F); Nishida, 1985 a (p.49, Redescr.F, figs.F, p.132); Yoo & Lim, 1993 (p.91, 94, 97, Table 1); Bradford-Grieve & al., 1999 (p.886, 966, figs.F); Vives & Shmeleva, 2010 (p.59, figs.F,M, Rem.)

Figures

Plate 1 Issued from : S. Nishida in Bull. Ocean Res. Inst., Univ. Tokyo, 1985, No 20. [p.50, Fig.23].
Female (from off SE Sri Lanka): a, habitus (dorsal); b, forehead (lateral); c, anal segment and caudal rami (dorsal); d, A1; e, A2; f, Md; g, Md (biting edge).

Species Oithona hamata - Plate 2 of morphological figures

Plate 2 Issued from : S. Nishida in Bull. Ocean Res. Inst., Univ. Tokyo, 1985, No 20. [p.51, Fig.24].
Female: a, thoracic segment 5 and genital segment partial (lateral left side); b, Mx1; c, Mx2; d, Mxp; e, P1; f, P2; g, P3; h, P4.

Species Oithona hamata - Plate 3 of morphological figures

Plate 3 issued from : I. Rosendorn in Wiss. Ergebn. dt. Tiefsee-Exped. \"Valdiviella\", 1917, 23. [p.15, Fig.5].
Female: a, habitus (dorsal); b, forehead (dorsal); c, urosomal segments 1 and 2; d, forehead (lateral); e, Md (mandibular palp); f, Mx1.

Nota: Proportion of lengths (p.cent) Prosome : 50.9, Urosome : 49.1. Relative lengths of urosomal segments and caudal rami8 : 8: 16: 9: 9: 7: 7.

Species Oithona hamata - Plate 4 of morphological figures

Plate 4 issued from : I. Rosendorn in Wiss. Ergebn. dt. Tiefsee-Exped. \"Valdiviella\", 1917, 23. [p.16, Fig.6].
Female: a, P1; b, P2; c, P3; d, P4.
Nota: Setal formula of the exopod swimming legs P1 to P4 (Se = outer setae ; Si = inner setae), P1 : 1, 1, 2 Se ; 0, 1, 4 Si ; P2 : 1, 0, 2 Se ; 0, 1, 5 Si ; P3 : 1, 0, 1 Se ; 0, 1, 5 Si ; P4 : 0, 0, 1 Se ; 0, 1, 5 Si .

Species Oithona hamata - Plate 5 of morphological figures

Plate 5 issued from : V.S. Shuvalov in Opred. Faune SSSR, Nauka, Leningrad, 1980, 125. [p.102, Fig.17].
Female: 1-2, habitus (dorsal); ahm, A1; 3, habitus (lateral); 4, same; 5-6, forehead (dorsal); 7, same (another specimen); 8-9, thoracic segments 4 and 5, genital segment (dorsal and lateral, respectively); 10, postrior part of urosome.

Plate 6 Morphological characters of Oithona hamata female :
1 - Anterior part of prosome produced into pointed rostrum in dorsal view.
2 - Exopod 3rd segment of P1 with 2 outer marginal spines.
3 - Number of setae in exopod of Md more than 3, and prosome length than 3.0 times of prosome width.
4 - Outer marginal spine in exopod 3rd segment of P4 curved smoothly.
5 - Endopod of Md with 4 setae, genital segment ventrally without tuft of hairs.

Complementary References

List of the studied authors

Grice & Hart, 1962 (p.287, table 3, p.293: Rem.); Björnberg, 1973 (p.356, 388); Kovalev & Shmeleva, 1982 (p.85); Greze & al., 1985 (p.8); Yoo, 1991 (tab.1); Siokou-Frangou, 1999 (p.478); Uysal & al., 2002 (p.18, tab.1); Uysal & Shmeleva, 2012 (p.909, Table I)

Distribution

NZ: 7

Distribution map of Oithona hamata by geographical zones

Distribution map of Oithona hamata for the Zone Mediterranean Sea, Black Sea

Distribution map of Oithona hamata for the Zone Indian Ocean

Distribution map of Oithona hamata for the Zone China Seas, Vietnam

Additional Maps & Charts

Species Oithona hamata - Distribution map 5

Map 5 Issued from : S. Nishida in Bull. Ocean Res. Inst., Univ. Tokyo, 1985, No 20. [p.132, Fig.81].
Indo-Pacific geographical distribution of Oithona hamata.

Localisations

Geographical glossary

Atlant. (equatorial), G. of Guinea, off Amazon, off Cape Cod, off SE New York, Medit. (Alboran Sea, W Basin, G. of Saronikos, Lebanon Basin), Arabian Gulf, Indian (equatorial), China Seas (Yellow Sea), S Korea (Cheju Is.), Pacif. (tropical), Chile (in Björnberg, 1973)

Quotations

N: 10

Dimensions (mm)

References of the authors concerning dimensions

(627) F: 1,35-1,29; (649) F: 1,06; (880) F: 1,06-1,1; {F: 1,06-1,35}

Remarks

epiplagic.
For Nishida (1985, p.49) the specimens agree with Rosendorn's (1917) description except for the presence of inner marginal seta on exopodal segment 1 of P1-P4 in the former. The species is distinguished from closely allied O. tenuis by the shape of rostrum and the absence of inner marginal seta on the basal segment of A2.

Last update : 28/11/2019

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