1. Class: Crustacea
Subclass: Copepoda
Order: Eucopepoda
Suborder:Cyclopoida
Microcyclops varicans (Sars)
Description:
The caudal rami has inner marginal hairs and is twice as long as wide. The lateral
spine on the caudal rami is place approximately midway (50%) the distance from
the last abdominal segment and tip of rami. Number of segments in the 1st
antennae is 9, sometimes 10, 11 or 12. The 5th leg of male is one segmented with
one long spine. The small cyclopoid is often misidentified and confused with
Ectocyclops phaleratus, Microcyclops bicolor and other small species.

2. Plate 023a. The 1st antennae (left) and caudal rami (right) of Microcyclops
varicans. The 1st antennae has 9 segments. Two setae on caudal
rami appear to be superior in size than others, with faint inter-most
setae slightly shorter than outer most setae.

3. Plate 023b. Caudal rami of Microcyclops varicans.
Lateral spine at 50%.
Hairs on margin
Plate 023b. Caudal rami of Microcyclops varicans.

4. Plate 023c. Fifth leg of Microcyclops varicans.
Spine on 5th leg segment
1st segment of 5th leg
Plate 023c. Fifth leg of Microcyclops varicans.