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BSC 201L (14e, rev.)
Lab #8: Crustaceans
Use the text and figures in Exercise 14 (The Crustacean Arthropods) to aid your study of the
prepared slides and preserved specimens; examine the additional specimens as indicated.
Things to know for Subphylum Crustacea:
Be able to identify tagmata.
Be able to identify head appendages: antennules (=first antennae), antennae (=second
antennae), mandibles, maxillules (=first maxillae), maxillae (=second maxillae).
Fresh water, marine water, terrest rial?
Male or female?
Structures and their functions
Phylum Arthropoda – cont’d
Subphylum Crustacea
– tagmata:
– head and trunk (1°)
– head, t horax, and abdomen (2°)
– cephalothorax and abdomen (2°)
– head appendages:
– 2 pairs of antennae (1 = antennules, 2 = antennae)
st nd
– 1 pair of mandibles
– 2 pairs of maxillae (1 = maxillules, 2 = maxillae)
st nd
– biramous appendages
Nauplius larva – text p. 220
– MW, FW
– first 3 pairs of appendages used for swimming (2 pairs of antennae, 1 pair of mandibles)
– typical, primitive crustacean larva
1. Slide
Class Branchiopoda
Order Anostraca, fairy shr imp, brine shrimp
Fairy shrimp adult – text p. 218
– FW, MW
2. Slide (w.m.) – Fig. 14-5
Order Diplostraca (No te: the order is given incorrect ly in the lab manua l)
Suborder Cladocera, water fleas
– FW
Daphnia – text pp. 218-219
– biramous second antennae enlarged for locomotion
– carapace covers thorax and abdomen, but not head
3. Slide – Fig. 14-5
– notice the eggs or the ephippia (resistant cysts) in parthenogenic female
