Quiz

Identify the following organisms using the ID Guide.
Be sure to think of defining characteristics so you can explain how you came to your decision.
There will be an answer key at the end.

Good Luck!

#1

#2 (these are the same)

#3

#4

#5

#6

#7

#8

#9

#10

#11

Answer Key

#1- Daphnia
Oblong body
Distinct, small, conical head shape
Distal spine


#2- Eurytemora
Prosome, ursosome, rami, 1st antennae extend form top of body
1st Antennae length of body
Rami is split high
Male (right side) has bent 5th leg and curly 1st antennae


#3- Chironomid Larvae
Segmented, cylindrical body
Hard, capsulated head region
Pair of proleg near head
Distal setae


#4- Pseudodiaptomus
Prosome, ursosome, rami, 1st antennae extend form top of body
1st Antennae length of body
Rami have a smallow split

#5- Chydoridae
Visible eye spot
Round body with no distinct head region
1st antennae are small, hardly visible


#6- Limnothoina
Prosome, ursosome, rami, 1st antennae extend form top of body
1st antennae are 1/4-1/2 length of the body
Long urosome
Rami split is high up and narrow


#7- Moina
Visible eye spot
Round/ oblong body with distinct head region
Multiple dents in back
1st antennae are extended
Visible distal setae


#8- Sinocalanus
Prosome, ursosome, rami, 1st antennae extend form top of body
1st antennae are longer than body
Distal spikes


#9- Ceriodaphnia
Visible eyespot
Round/oblong body with dinstinct head region
Only 1 dent in back
1st antennae aren't that visible
No setae


#10- Bosmina
Visible eyespot
Round body, no dinstict head region
Long 1st antennae


#11- Simocephalus
Visible eyespot
Oblong body with distinct, small, conical head region
No dent in back
No distal spine