BIOL 1000 Lecture Notes - Lecture 5: Malpighian Tubule System, Book Lung, Somite
Document Summary
Subphylum chelicerata: arthropods anterior of the body called cephalothorax never divided into head and thorax, no antennae, mouth consists of paired chelicerae and paired pedipalps, possess 4 pairs of walking legs. Class arachnida: terrestrial chelicerates with waxy cuticle, respiration by book lungs, 4 pairs of walking legs and lacks abdomen appendages, spiders, scorpions, ticks and mites. Subphylum myriapoda: unbranched appendages, one pair of antennae, respiration by tracheae, excretion is by malpighian tubules. Class chilopoda: terrestrial, carnivores with flattened bodies and one long antennae, good amount of somites each with a pair of legs, appendages on 1st segment are modified as poisonous claws, younger only have fewer segments, centipedes. Class diplopoda: terrestrial, herbivorous with cylindrical bodies one pair of short antennae, a lot of somites each with two pairs of legs, appendages of seventh somite are specialized as copulatory organs, millipedes.
