Water Quality Monitoring with Benthic Macroinvertebrates Benthic Macroinvertebrate Identification Quiz

BMI Identification Quiz You will be presented with images of 10 different kinds of benthic macroinvertebrate For each image, identify the benthic macroinvertebrate (0.5 mark) and (using correct scientific terminology) list one unique characteristic of that benthic macroinvertebrate (0.5 mark)

1. Turbellaria (Flatworm) – eyespots on head, unsegmented, flat shape http://www.microscopyu.com/moviegallery/pondscum/platyhelminthes/dalyellia/

2. Oligochaeta (Aquatic Earthworm) - Segmented body, Similar appearance to earth worm

3. Isopoda (Sow Bug) - Dorso-ventrally compressed, many pairs of legs (up to 8)

4. Amphipoda (Scud) – Laterally compressed, many pairs of legs (up to 14) http://mywebpages.comcast.net/kils/hyperia/hyperia1.htm

5. Decapodae (Crayfish) - Large claws, similar appearance to lobster, eyes on small stalks

6. Ephemeroptera (Mayfly) - Single tarsal claw, 3 tail filaments (sometimes only 2 filaments are present)

7. Coleoptera (Beetle) - Adults: hardened forewings protect soft hind wings, antennae with 11 or fewer segments, Most have 3 pairs of legs near head

8. Chironomidae (Midge) - Segmented body, shaped like letter “J” when preserved, well developed, hardened head with eyes; anterior and posterior parapods (lobed shaped body extensions)

9. Culicidae (Mosquitos) - Thickened body at head, segmented body, curved at one end, movement: twitches when touched http://insects.tamu.edu/images/insects/common/images/b-txt/bimg221.html

10. Simuliidae (Blackfly) Sessile (non-motile), attached at posterior end Often with labral fans Similar to flattened maggot with one end 1/3 fatter

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