Species Card of Copepod
Cyclopoida ( Order )
    Oithonidae ( Family )
        Oithona ( Genus )
Oithona rostralis  Nishida, Tanaka & Omori, 1977   (F)
Ref.:
in Nishida & al., 1977 (p.145, figs.F)
Species Oithona rostralis - Plate 1 of morphological figuresIssued from : S. Nishida, O. Tanaka & M. Omori in Bull. Plankton Soc. Japan, 1977, 24 (2). [p.146, Fig.18].
Female (from Suruga Bay): a, habitus (dorsal), b, forehead (lateral); c, 5th thoracic segment; d, Md; e, Mx1; f, P1; g, P2; h, P3; i, P4.

Nota: P1-P4 setae formula (from outer setae and inner setae). P1: 1,1,2; 1,1,4. P2: 1,1,3; 1,1,5. P3: 1,0,2; 1,1,5. P4: 0,0,1; 1,1,5.
Outer seta of Exopod 3 of P4 about as long as the terminal seta.
Prosome 2.7 times as long as wide. Prosome length/urosome length = 1.13.
A1 extending to the distal margin of genital segment.

NZ: 1

Distribution map of Oithona rostralis by geographical zones
Loc:
Japan (off Suruga Bay)
N: 1
Lg.:
(155) F: 1; {F: 1,00}
Rem.: For Nishida & al. (1977) this species is closely related to Oithona plumifera, but it can distinguished from the latter species by the shape of rostrum and the P2-P4 setae formulae.
Last update : 06/09/2015
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2021. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed October 19, 2021]

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