An Image-Based Key to the Zooplankton of the Northeast (USA)

Examining the highlighted area
of your specimen, click on the
image to the right which most
closely resembles your specimen.

Optic vesicle (ov) touches margin of head
2nd (2) and 3rd (3) abdominal processes strongly pubescent (hairy)

Optic vesicle (ov) does not touch margin of head
2nd (2) and 3rd (3) abdominal processes weakly pubescent or lacking pubescence

Taxonomy

Phylum	Arthropoda
Subphylum	Crustacea
Class	Branchiopoda
Suborder	Cladocera
Family	Daphniidae
Genus	Daphnia