01:119:116 Lecture Notes - Lecture 6: Gastrovascular Cavity, Eumetazoa, Deuterostome

• School: Rutgers University
• Department: Biological Science
• Course: 01:119:116
• Professor: Professor Beal

Document Summary

No tissues: simple sac-like body with pores, osculum- open end, spongocoel central cavity (not a coelom, choanocytes. A single opening = mouth and anus. Introduction to bilateria: protostomes, remember - protostome development, most bilateral organisms, deuterostomes, clade deuterostomia, monophyletic. Clade lophotrochozoa: shared derived traits, largest of bilateria clades, may have . Lophophore (crown of ciliated feeding tentacles: trochophore larvae, phylum platyhelmenthes, flat worm , derived traits: Free living in water or parasite: dorsoventrally flattened, phylum rotifera, derived traits: Pseudocoelomate: cilia on head = corona (crown, microscopic, freshwater or marine, phylum mollusca, true coelom, derived traits: Soft body, usually with a shell: radula (most, body in 3 main parts: Visceral mass: mantle, three major classes, gastropods (stomach feet, snails. Bivalves - (two shells: ex: scallops, clams, mussels, cephalopods (head feet, phylum annelida, segmented worms , true coelom, freshwater, marine, terrestrial, derived trait, repeated segmentation (hox!!)