Examining the highlighted area of your specimen, click on the image below which most closely resembles your specimen.
Lateral spine
(ls)
located in middle
(m3)
or proximal
(p3)
third of segment
Lateral spine
(ls)
located in distal third
(d3)
of segment
Taxonomy
Phylum
Arthropoda
Subphylum
Crustacea
Class
Maxillopoda
Subclass
Copepoda
Order
Calanoida
Family
Diaptomidae