PHYLUM ARTHROPODA

SUBPHYLUM CRUSTACEA

Class Maxillopoda

Order Copepoda

Family Ergasilidae

Ergasilus lizae
This parasitic copepod was recovered from the gills of a redbreast sunfish. Compare to the drawing in Figure 8.1A of your textbook (page 227), noting the modifications to the antennae for attachment to the gills.

SUBPHYLUM CHELICERATA

Class Arachnida

Order Ixodida

Tick
Compare the tick to figures 8.18 and 8.19 of your textbook (pages 244 and 245). Use the key given in Figure 5.1 to identify the genus of your tick.

Mite
Compare the mite to figures 8.26-8.33 in your textbook (pages 250-254). What accounts for the limb reduction in certain species?

SUBPHYLUM UNIRAMIA

Superclass Insecta (Hexapoda)

Order Anoplura

Pediculus humanis capitus
Examine the human head louse, noting the sucking mouthparts. Compare to Fig. 8.43 in your textbook (page 265). Examine the tarsal claws, which are adapted to grasp the hair of the head.

Phthirius pubis
Examine the human crab louse, and compare to Fig. 8.44 in your textbook (page 265). What accounts for the difference between the morphology of the tarsal claws of the head louse and the crab louse?

Order Diptera

Family Culicidae

Examine the life stages of the Culex mosquito, noting the adaptions of the larval stage and pupal stage for an aquatic existence. Compare and contrast the mouthparts of Anopheles and Culex mosquitos.