Figure 1 from: Cepeda GD, Sabatini ME, Scioscia CL, Ramírez FC, Viñas MD (2016) On the uncertainty beneath the name Oithona similis Claus, 1866 (Copepoda, Cyclopoida). ZooKeys 552: 1-15. https://doi.org/10.3897/zookeys.552.6083

Figure 1 - Former selected drawings of Oithona similis / helgolandica. A, B Oithona spinifrons Boeck, 1864 (=? Oithona helgolandica Claus), female body and "one of swimming feet" (= leg 4?) (after Brady1878, Plates XIV and XXIV A) C–F Oithona similis exopod of legs 1 to 4 (after Gisbrecht 1893, Plate 34) G–J Oithona helgolandica, female body, legs 1-2 and leg 4 (after Sars 1913, Plate III) K–O Oithona similis, female body and legs 1 to 4 (after Nishida 1985, fig. 50 and 51). Original illustrations were faithfully copied in all details and rearranged to facilitate comparisons. Scale bars only provided in Nishida (1985).