Myriapods

Millipede and centipede

Pan crustaceans

insects and crustaceans

crustaceans

lobsters, crab, shrimp, pill bugs Many have highly specialized appendages: walking legs located on thorax; swimming appendages on tail

Insects

Three regions: Head, thorax, post genital region complex internal organ system wings are extensions of the cuticle

Deuterostomia

Phylum Echinodermata and phylum Chordata Radical cleavage Blastopore forms the anus

Echinodermata

sea stars and sea urchins Slowly moving marine coelomates spiny covering on endoskeleton water vascular system bilaterally symmetrical larvae

Chordata

two groups invertebrates and vertebrates

What type of symmetry do adults exibit?

Bipentral symmetry

Characteristics of Chordates

Notochord Hollow nerve chord pharyngeal slits or clefts muscular, post- anal tail

Notochord

a rod that supports the body

Lancelets

cephaochordata: small fish like invertebrate chordates

Tunicates

Urochordata: sea squirts

Vertebrates

Chordates with a backbone skeletal system and complex nervous system Efficient at: capturing food and evading prey

Gnathostomes

Vertebrates that have a jaw and teeth include sharks, ray finned fish, tetrapods

Tetrapods

Gnathostomes with limbs four limbs a neck absence of gills ears

Amphibians

Most have moist skin that functions as gas exchange eggs lack a shell many live in land and water

Amniotes

Tetrapods that lay eggs with amnion, chorion, yolk sac Include reptiles, birds, mammals

Reptiles

Dinosaurs, turtles, snakes, Dry skin with scales lay shelled eggs on land internal fertilization

Mammals

Amniotes with hair and produce milk 3 major lineages - monotremes -marsupials - eutherians

Monotremes

Egg laying mammals Milk comes from glands on belly

Marsupials

pouched animals Ex. Kangaroos

Eutherians

Complex placenta complete development withing uterus Ex. Humans