Animals from chapter 33 Eumetazoa)

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Animals from chapter 33 Eumetazoa) by Mind Map: Animals from chapter 33 Eumetazoa)

1. Metazoa

2. Porifera

3. Eumetazoa

4. Cnidaria

4.1. Medusozoan

4.1.1. Scyphosoan

4.1.2. Cubozoan

4.1.3. Hydrazoan

4.2. Anthozoa

4.2.1. Coral

4.2.2. Sea anemone

5. Lophotrochozoa

5.1. All have bilateral symmetry and triplobastic development

5.2. Most have a coelom and digestive tract with two openings

5.3. Some develop a lophphore for feeding

5.4. Some have a trochophore larval stage

5.5. Few have neither

5.6. Platyhelminthes (flatworms)

5.6.1. Are acoelomates

5.6.2. Are gastrovascular cavity with one opening

5.6.3. Gas exchange takes place across the surface by diffusion

5.6.4. Protonephrida regulate the osmotic balance

5.6.5. Catenulida (chain worms) Reproduce asexually by budding

5.6.6. Rhabditophora Free living example: planarians Parasistic examples: Trematodes Tapeworms

5.7. Rotifers

5.7.1. Truly multicellular with specialized organ systems

5.7.2. Have alimentary canal: digestive tube with separate mouth/anus within fluid-filed pseudocoelom

5.7.3. Reproduce by pathenogenesis: female producing offspring from unfertilized eggs

5.8. Lophophorates

5.8.1. Have lophophore: a crown of cilliated tentacles around the mouth

5.8.2. Have true coelom

5.8.3. Ectoprocts (bryozoans) Sessile Colonial (slightly resemble plants) Exoskeleton encases colony Some species are reef builders

5.8.4. Brachipods Marine Slightly resemble clams but with two halves of shell being dorsal and central rather than just lateral like with clams

5.9. Molluscs

5.9.1. All have muscular foot, visceral mass, and mantle

5.9.2. Most have water-filled mantle cavity

5.9.3. Feed using rasplike radula

5.9.4. Polyplacophora (chitons) Encased in armor of eight dorsal plates

5.9.5. Gastropoda Have spiraled shell which protects from injury and predators and prevents dehydration

5.9.6. Bivalvia Examples: clams, oysters, mussels, scallops Mantle cavity contains gills for feeding and gas exchange

5.9.7. Cephaloda Examples: squid, octopi Use beak-like jaws and tentacles for feeding Have, complex brain, circulatory system, and well-developed sense organs

5.10. Annelid

5.10.1. Coelomates with bodies composed of series of fused rings

5.10.2. Errantia Mobile, marine organism Most have parapodia: paddle-like "feet" on each body segment Each parapodium has numerous chaetae: bristles made of chitin

5.10.3. Sedentaria Less mobile Some burrow into substrate, other live in protective tubes (tube-dwelling) Leeches Parasites that suck blood Secrete chemical called hirudin to prevent blood from clotting Earthworms Have cuticle

6. Ecdysozoa

6.1. Nematodes

6.2. Tardigrada

6.3. Arthropods

6.4. Chelicerates

6.5. Myriapods

6.6. Pamcrustaceans