Spinoncaea ivlevi (Shmeleva, 1966), female, robust form (Korea Strait) A antenna [a: first endopod segment of right antenna, additional broad spinules arrowed] B maxilla, long setule arrowed C labrum, anterior, additional setules arrowed D P5-bearing somite, ventral, midventral spinous processes and weakly pronounced ventrolateral lobes arrowed. Scale bars in μm.

 
 
  Part of: Cho K, Park C, Böttger-Schnack R (2021) Taxonomy of three species of the genus Spinoncaea (Copepoda, Oncaeidae) in the North Pacific Ocean with focus on morphological variability. ZooKeys 1043: 147-191. https://doi.org/10.3897/zookeys.1043.64438