Examining the highlighted area of your specimen, click on the image below which most closely resembles your specimen.
Right first exopod (e1), inner margin without a quadrangular membrane
Right first exopod (e1), inner margin with a quadrangular membrane
(qm)
Taxonomy
Phylum
Arthropoda
Subphylum
Crustacea
Class
Maxillopoda
Subclass
Copepoda
Order
Calanoida
Family
Diaptomidae