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Arthropod classification
- 2. SUBPHYLUM TRILOBITOMORPHA • Trilobites • Diverse group of marine invertebrates who lived during the 500 -250 million years ago. • Well preserved fossil record. (Why?) • Ancestor to modern arthropods
- 3. SUBPHYLUM CHELICERATA • Class Merostomata – Horseshoe Crabs • Class Arachnida – Spiders, Scorpions, Ticks • Class Pycnogonida – Sea Spiders
- 4. SUBPHYLUM CHELICERATA • No antenna • Two body segments (cephalothorax, abdomen) • First pair of appendages (chelicera) adapted for feeding • Second pair of appendages (pedipalps) to hold prey • Book lungs/book gills for respiration
- 5. SUBPHYLUM MANDIBULATA • Class Myriapoda • Order Chilopoda • Order Diplopoda • Class Insecta • Subclass Apterygota (Wingless Insects) • Subclass Pterygota (Winged Insects) • Class Crustacea • Subclass Malacostraca (Crabs, Lobsters, Shrimp, Woodbugs) • Subclass