Plate 1 Issued 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.
Distribution
NZ: 1
Distribution map of Oithona rostralis by geographical zones
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.
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