BIOL108 Lecture Notes - Lecture 25: Arthropod, Chelicerae, Millipede

• School: University of Alberta
• Department: Biology (Biological Sciences)
• Course: BIOL108
• Professor: Lien Luong

Document Summary

On exam, responsible for scientific names from phylum to order. Less tagmatized head with ocelli, mandibles, 1 pair antennae trunk with from 9 325 pairs of jointed legs. A few may suck out contents fungal hyphae. 1 pair of modified legs behind mouthparts poison claws - subdue prey and fight predators cheilos = lip, pod = foot a few species poisonous to humans. Chelicerata (subphylum) horseshoe crabs, scorpions, spiders, mites and their relatives lack antennae. 2 or 3-segmented pincers chel = claw, ceros = horn muscular, used to inject venom. 2 main tagmata some taxa have more or fewer, though cephalothorax wholly or partially covered by carapace. 6 pairs of limbs: 4 pairs of legs, chelicerae, pedipalps (sensory, handle food, transfer sperm to females) eyes, if present are located here abdomen may or may not bear appendages contains guts and reproductive organs. ~ 90,000 spp. , mainly terrestrial but many mites secondarily aquatic.