II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla a. Phylum Trilobita - jointed appendages on every segment - dominated in Paleozoic (600 – 250 mya)
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla b. Phylum Chelicerata 1. Diversity Eurypterids (“Sea Scorpions”)
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla b. Phylum Chelicerata 1. Diversity Eurypertids Horseshoe “Crabs”
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla b. Phylum Chelicerata 1. Diversity Scorpions Arachnids Spiders Mites Ticks
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla b. Phylum Chelicerata 2. Biology - first terrestrial animals – 450 mya (scorpion-like)
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla b. Phylum Chelicerata 2. Biology - first terrestrial animals – 450 mya - two body segments: cephalothorax (fusion) abdomen
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla b. Phylum Chelicerata 2. Biology - first terrestrial animals – 450 mya - two body segments: cephalothorax (fusion) abdomen - Fusion of abdominal segments
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla b. Phylum Chelicerata 2. Biology - first terrestrial animals – 450 mya - two body segments: cephalothorax (fusion) abdomen - Fusion of abdominal segments - Gills or “book lungs”
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla c. Phylum Myriapoda 1. Diversity Pauropods
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla c. Phylum Myriapoda 1. Diversity Pauropods Centipedes
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla c. Phylum Myriapoda 1. Diversity Pauropods Centipedes Millipedes
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla c. Phylum Myriapoda 2. Biology - spiracles for breathing
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla d. Phylum Crustacea 1. Diversity Remipede
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla d. Phylum Crustacea 1. Diversity Decapods (Shrimp, Loster, Crabs)
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla d. Phylum Crustacea 1. Diversity Decapods (Shrimp, Loster, Crabs) Copepods Barnacles
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla d. Phylum Crustacea 2. Biology - three body regions - appendages modified for different functions; head for senses (antennae) and feeding; thorax for locomotion; abdomen for reproduction.
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla e. Phylum Hexapoda 1. Diversity - Collembola
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla e. Phylum Hexapoda 1. Diversity - Collembola - Protura
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla e. Phylum Hexapoda 1. Diversity - Collembola - Protura - Insecta
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla e. Phylum Hexapoda 2. Biology - spiracles
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla e. Phylum Hexapoda 2. Biology - spiracles - Fusion of segments into three regions: head, thorax, abdomen
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla e. Phylum Hexapoda 2. Biology - spiracles - Fusion of segments into three regions: head, thorax, abdomen - Flight in insects
II. Animal Diversity b. Ecdysozoans 3. Arthropod Phyla e. Phylum Hexapoda 3. Why are there SO MANY insect species?? - flight: high powers of dispersal - small: so they are unlikely to get back to the same place the left. - tough: exoskeleton resists desiccation - fecund: have lots of offspring increase probability of geographical isolation increase probability of establishing a population
II. Animal Diversity C. Bilateria 1. Protostomes – blastopore forms mouth a. Lophotrochozoans b. Ecdysozoans 2. Deuterostomes – blastopore forms anus a. Echinodermata b. Hemichordata c. Chordata
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus a. Echinodermata 1. Diversity - sea stars
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus a. Echinodermata 1. Diversity - sea stars - sea cucumbers
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus a. Echinodermata 1. Diversity - sea stars - sea cucumbers - sea urchins
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus a. Echinodermata 2. Biology - “biradial symmetry”
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus a. Echinodermata 2. Biology - “biradial symmetry” - internal skeleton – calcified plates
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus a. Echinodermata 2. Biology - “biradial symmetry” - internal skeleton – calcified plates - filter feeders (Sea Lily), herbivores (sea urchins), predators (sea stars).
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus b. Hemichordata – Acorn Worms
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus b. Hemichordata – Acorn Worms - pharyngeal gill slits - hollow dorsal nerve tube
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters - Pharyngeal Gill Slits
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters - Pharyngeal Gill Slits - Hollow Dorsal Nerve Tube
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters - Pharyngeal Gill Slits - Hollow Dorsal Nerve Tube - Post-anal tail
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters - Pharyngeal Gill Slits - Hollow Dorsal Nerve Tube - Post-anal tail - notochord – a rigid supporting rod
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters 1. Urochordata - Tunicates
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters 1. Urochordata – Tunicates - 4 traits as larva
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters 1. Urochordata – Tunicates - 4 traits as larva - mobile as larva
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters 1. Urochordata – Tunicates - 4 traits as larva - mobile as larva - become sedentary as adults (filter)
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters 2. Cephalochordata – Lancelets
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: Four Key Characters 2. Cephalochordata – Lancelets - 4 traits - burrowers - filter feeders
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: 3. Vertebrata
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: 3. Vertebrata - four traits
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: 3. Vertebrata - four traits - vertebral column
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: 3. Vertebrata - four traits - vertebral column - trends:
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: 3. Vertebrata - four traits - vertebral column - trends: - increased locomotion
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: 3. Vertebrata - four traits - vertebral column - trends: - increased locomotion - increased cephalization
II. Animal Diversity C. Bilateria 2. Deuterostomes – blastopore forms anus c. Chordata: 3. Vertebrata - four traits - vertebral column - trends: - increased locomotion - increased cephalization - adaptations to land
II. Animal Diversity 3. Vertebrata a. Origin of Vertebrates - filter feeding ancestor (lancelet-like) mya - Pikaea
II. Animal Diversity 3. Vertebrata a. Origin of Vertebrates
II. Animal Diversity 3. Vertebrata b. Jawless Fishes – (Class: Agnatha) - Early: Ostracoderms – filter feeding
II. Animal Diversity 3. Vertebrata b. Jawless Fishes – (Class: Agnatha) - Current: lampreys, hagfishes: parasitic
II. Animal Diversity 3. Vertebrata c. Jawed Fishes
II. Animal Diversity 3. Vertebrata c. Jawed Fishes - gill arches
II. Animal Diversity 3. Vertebrata c. Jawed Fishes - gill arches - evolved to jaws
II. Animal Diversity 3. Vertebrata c. Jawed Fishes - gill arches - evolved to jaws - increase feeding
II. Animal Diversity 3. Vertebrata c. Jawed Fishes - gill arches - evolved to jaws - increase feeding - priority on locomotion
II. Animal Diversity 3. Vertebrata c. Jawed Fishes - gill arches - evolved to jaws - increase feeding - priority on locomotion - Cephalization
II. Animal Diversity 3. Vertebrata c. Jawed Fishes - Placoderms(extinct – survived to Permian) dominant predators paired appendages for swimming
II. Animal Diversity 3. Vertebrata c. Jawed Fishes - Placoderms(extinct – survived to Permian) - Cartilaginous fish (Class: Chondrichthyes) also efficient paired fins - sharks - skates, rays - ratfish
II. Animal Diversity 3. Vertebrata c. Jawed Fishes - Placoderms(extinct – survived to Permian) - Cartilaginous fish (Class: Chondrichthyes) - Bony Fish (Class: Osteichthyes)