Arthropod Life Processes

Cuticle (Exoskeleton)

Ecdysis (Molting)

Molting in Decapods

Molting in Insecta

Molting & Growth

• With each molt an arthropod grows 10-20% in size

• Molting is hormonally and environmentally controlled

Visual System

Vision System

Phylum Arthropoda

Subphylum Crustacea

Subphylum Crustacea

• 1 pr appendages on each segment

• 2 pr maxillae

• 1 pr mandibles

• 2 pr antennae

SP Crustacea, Class Branchiopoda

• Flattened appendages• Central body appendages

serve respiratory function (gill-like)

Order Notostraca (tadpole shrimp)

Order Anostraca (fairy shrimp)Order Cladocera(water fleas – Daphnia)

SP Crustacea, Class Maxillopoda• Subclasses

Branchiura

Copepoda

Ostracoda

SP Crustacea, Class Maxillopoda• Subclass Cirripedia

Acorn barnacles

Gooseneck barnacles

SP Crustacea, Class Maxillopoda

Subclass Cirripedia

Barnacles on a whale

SP Crustacea, Class Malacostraca

Order Amphipoda

Parasitic marine isopod

Order Isopoda

SP Crustacea, Class Malacostraca

• Krill– Major contributor to zooplankton– Food source for baleen whales

Order Euphausiacea

SP Crustacea, Class Malacostraca

Order Decapoda

Subphylum Crustacea • Class Brachiopoda

• 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

Walking legs

External Features of a Decapod

Parts are parts

Decapod Internal Anatomy

Circulatory & Respiratory Systems

Excretory Systems

Crustacean Reproduction & Development