L11 insects - BILD 3 July 12, 2010 Porifera [sponges]!...

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BILD 3 July 12, 2010 1 Porifera [sponges] Cnidaria Lophotrochozoans Platyhelminthes Molluscs Annelids Ecdysozoans Nematodes Arthropods Deuterostomes Echinoderms Chordates ARTHROPODA Cheliceriformes horseshoe crabs spiders, scorpions Myriapoda millipedes, centipedes Hexapoda Insects 10 18 individuals, 2-10 million species Crustacea amphipods, isopods, copepods, crabs, shrimp, barnacles ARTHROPODA Linked to nematodes in recent molecular phylogenies Bilateral protostomes, coelomate, triploblastic Segmented body: head, thorax, abdomen Exoskeleton: chitin & protein, undergoes ecdysis Appendages: jointed, specialized Dorsal blood vessels – Ventral nerve cord Tracheal system Predator – prey Parasite – host Smaller than prey Parasitoid – host: 50% animals, 60% insects Same size as prey Insect development Gradual [incomplete] metamorphosis egg nymph (1 to n size stages) adult Complete metamorphosis egg larva (feeding) pupa adult (reproduction & dispersal) Molting – ecdysis ARTHROPODA: CRUSTACEA: LAND CRAB CRUSTACEA: ISOPODA, pill bug or wood lice CHELICERIFORMES: ARACHNIDA MALE AND FEMALE SPIDER
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BILD 3 July 12, 2010 2 THORN OR BONY SPIDER Camel spiders – a group of spider-like arachnids GIANT DESERT MITE
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This note was uploaded on 07/28/2010 for the course BIOLOGY BILD 3 taught by Professor Davidwoodruff during the Summer '10 term at San Diego.

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L11 insects - BILD 3 July 12, 2010 Porifera [sponges]!...

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