Animals - Deuterostomes

Chapter 30

Characteristics

Similarities in embryonic development:

Radial cleavage Indeterminate cleavage Blastopore becomes the anus Pharyngeal slits

Echinoderms: Spiny-skinned animals

Sea lilies, feather stars, sea stars, brittle stars, sea urchins, sand dollars, sea cucumbers, sea daisies

Endoskeleton covered by a thin epidermis

Water vascular system Radial symmetry All are marine

Chordates

Tunicates, Lancelets, and vertebrates

Four characteristics:1. Notochord2. Dorsal tubular nerve cord3. Pharyngeal slits4. Postanal tail

Agnatha – lampreys & hagfish

Cartilagenous fish – Sharks, skates, & rays

Bony Fish – most fish are in this group

Frogs – have smoother skin than Toads

Salamanders & Newts

Caecilian

Modern Reptiles

Birds

Along came mammals: Monotremes lay eggs

Marsupials: Pouched Mammals

Placental Mammals