Arthropod Life Processes

Cuticle (Exoskeleton) Fig. 19.10

Ecdysis (Molting) Fig. 19.11

Molting in Decapods Fig. 19.12a

Molting in Insecta

Molting & Growth With each molt an arthropod grows 10-20% in size Molting is hormonally and environmentally controlled

Visual System Fig. 20.22

Vision System Fig. 19.8

Phylum Arthropoda Subphylum Crustacea

Fig. 19.28

Subphylum Crustacea 1 pr appendages on each segment 2 pr maxillae 1 pr mandibles 2 pr antennae

SP Crustacea, Class Branchiopoda Order Notostraca (tadpole shrimp) Order Anostraca (fairy shrimp) Order Cladocera (water fleas – Daphnia) Fig. 19.15 Flattened appendages Central body appendages serve respiratory function (gill-like)

SP Crustacea, Class Maxillopoda Subclasses Ostracoda Fig. 19.16 Branchiura Copepoda

SP Crustacea, Class Maxillopoda Gooseneck barnacles Subclass Cirripedia Acorn barnacles

SP Crustacea, Class Maxillopoda Subclass Cirripedia Fig. 19.24a Barnacles on a whale

SP Crustacea, Class Malacostraca Order Isopoda Order Amphipoda Fig. 19.21b Parasitic marine isopod

SP Crustacea, Class Malacostraca Order Euphausiacea Fig. 19.25 Krill Major contributor to zooplankton Food source for baleen whales

SP Crustacea, Class Malacostraca Order Decapoda Fig. 19.26a

Subphylum Crustacea Class Brachiopoda Class Maxillopoda Order Notostaca Order Cladocera Order Anostraca Class Maxillopoda Subclass Branchiura Subclass Copepoda Subclass Ostracoda Subclass Cirripedia Class Malacostraca Order Amphipoda Order Isopoda Order Euphausiacea Order Decopoda

Crustacean Segmental & Appendage Morphology Antenna Fig. 19.1 Walking legs

External Features of a Decapod Fig. 19.2

Parts are parts Fig. 19.4

Decapod Internal Anatomy Fig. 19.5

Circulatory & Respiratory Systems Fig. 19.3

Excretory Systems Fig. 19.7

Crustacean Reproduction & Development Fig. 19.9