Plate 1 issued from : R.B.S. Sewell in Mem. Indian Mus., 1929, X. [p.188, Fig.67]. Male (from Laccadive Sea): a, habitus (dorsal); b, A2; c, P1; d, P2; e, P3; j, P5. Nota: the specimen resembles S. persecans (Giesbrecht), it differs from that species in its much larger size and in the absence of any crest on the head.
Distribution
NZ: 1
Distribution map of Scottocalanus investigatoris by geographical zones
After Tanaka (1961 a, p.150) the male of S. rotundatus differs from S. investigatoris in its small size and in having a small process on the 1st segment of the right P5