Ch 33 - Invertebrates (PART 2 of 2)(1 slide per page)-1

Vascularized tissues w a lot of surface area

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Unformatted text preview: x 1: Chelicerae (claw-like or fangs) 2: Pedipalps (sensing, feeding, or reproduction) 3-6: 4 pr walking appendages •No Antennae •Respiration: Book gills and book lungs - well vascularized tissues w/ a lot of surface area http://www.enchantedlearning.com/subjects/invertebrates/arthropod/Horseshoecrab.shtml Figure 33.32 (Campbell et al) 108 Chelicerata: Class Merostomata • large carapace • 4 eyes • Blue blood due to haemocyanin (w/ copper) instead of haemoglobin (w/ iron) Look similar to extinct subphylum: Trilobita (extinct in Permian) but w/ fused and specialized segments 109 Mating at the shoreline male • Up to 80,000 eggs/ season • External fertilization • Eggs get buried in the sand 110 2. Subphylum Crustacea lobsters, crayfish, shrimp, barnacles, pillbugs • Many segments • 2-3 body regions • 2 pairs of antennae • Many appendages (1 per segment) on both thorax and abdomen • Modified for sensory, feeding, walking, copulation, swimming… • Many are branched (forked) •Marine and freshwater (a few terrestrial) Figure 33.29 and 33.38 (Campbell et al) 111 Coconut Crab (Birgus latro) - Is a giant hermit crab - Largest land-living arthropod in the world - Inhabits the coastal forest regions of many Indo-Pacific islands - Feed on fruits, nuts, seeds 112 3A. Subphylum Myriapoda (“many feet”) Unspecialized: many segments, most identical Class Chilopoda centipedes • Flat body (head/trunk) • Carnivores • 1 pair legs / segment • Fangs 113 3B. Subphylu...
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