Examining the highlighted area of your specimen, click on the image below which most closely resembles your specimen.
Inner process
(ip)
on second left exopod slender and or curved
Inner processes
(ip)
digitform and blunt
Taxonomy
Phylum
Arthropoda
Subphylum
Crustacea
Class
Maxillopoda
Subclass
Copepoda
Order
Calanoida
Family
Diaptomidae