Phylum Arthropoda II Classification Subphylum Myriapoda Class Chilpoda Class Diplopoda Subphylum Hexpoda Class Insecta Subclass Apterygota Subclass Pterygota Subdivision Endopterygota Order Coeloptera Order Lepidoptra Order Hymenoptera Order Diptera Sub Division Exopterygota Order Odonata Order Orthoptera Order Isoptera Order Hemioptera Order Homoptera Subphylum Myriapoda Class Diplopoda Millipede two pairs of legs per somite Subphylum Myriapoda Class Chilopoda Centipede one pair legs per somite Subphylum Hexapoda Class Insecta Subclass Apterygota Wingless insects ametabulous Subphylum Hexapoda Class Insecta Subclass Pterygota Subdivision Endoptyergota Order Coeloptera Beetles Subphylum Hexapoda Class Insecta Subclass Pterygota Subdivision Endopterygota Order Lepidoptera Butterflies moths skippers Wings covered by small scares Subphylum Hexapoda Class Insecta Subclass Pterygota Subdivision Endopterygota Order Hymenoptera Bees wasps ants Subphylum Hexapoda Class Insecta Subclass Pterygota Subdivision Endopterygota Order Diptera Flies one set of wings second set modified into halters for balance Subphylum Hexapoda Class Insecta Subclass Pterygota Subdivision Exopterygota Order Odonata Dragonflies and damselflies Subphylum Hexapoda Class Insecta Subclass Pterygota Subdivision Exopterygota Order Orthoptera Grasshoppers crickets roaches Subphylum Hexapoda Class Insecta Subclass Pterygota Subdivision Exopterygota Order Orthoptera Grasshoppers crickets roaches Subphylum Hexapoda Class Insecta Subclass Pterygota Subdivision Exopterygota Order Orthoptera Grasshoppers crickets roaches Subphylum Hexapoda Class Insecta Subclass Pterygota Subdivision Exopterygota Order Orthoptera Dissection Malpighian tubules Ovary testis Hindgut Gastric Caecum Proventriculus Tracheae Crop Subphylum Hexapoda Class Insecta Subclass Pterygota Subdivision Exopterygota Order Orthoptera Life cycle Subphylum Hexapoda Class Insecta Subclass Pterygota Subdivision Exopterygota Order Isoptera Termites Subphylum Hexapoda Class Insecta Subclass Pterygota Subdivision Exopterygota Order Hemioptera True bugs no wings Phylum Mollusca Subphylum Hexapoda Class Insecta Subclass Pterygota Subdivision Exopterygota Order Homoptera Cicadas aphids leaf hoppers Classification Class Gastropoda snails whelks conchs abalone nudibranches slugs periwinkles Class Bivalvia clams scallops oysters mussles Class Scaphopoda tusk shells Class Polyplachophora chitons Class Cephalopoda octopus cuttlefish squids nautilus Phylum Mollusca Class Gastropoda Dextral right vs Sinistral left Phylum Mollusca Class Gastropoda Egg Ribbon Phylum Mollusca Class Gastropoda Land Slug Phylum Mollusca Class Gastropoda Snail Phylum Mollusca Class Gastropoda Sea Slug Phylum Mollusca Class Gastropoda Nudibranch Phylum Mollusca Class Gastropoda Periwinkles tiny snails Phylum Mollusca Class Bivalvia Phylum Mollusca Class Bivalvia Scallops Phylum Mollusca Class Scaphopoda Tusk shells Phylum Mollusca Class Polyplachophora Chitons Phylum Mollusca Class Cephalopda Squids Phylum Mollusca Class Cephalopda Octopus Phylum Mollusca Class Cephalopoda Cuddle fish bone Phylum Mollusca Class Cephalopoda Nautilus Phylum Mollusca Class Cephalopoda Cuttle Fish Class Echinoidea sea urchins sand dollars Classification sea biscuists baskets Class Ophiuroidea Brittle stars sea Class Crinoidea feather star Class Holothuroidea sea cucumbers Class Asteroidea sea stars Phylum Echinodermata Class Echinoidea Sea Urchin Phylum Echinodermata Phylum Echinodermata Class Echinoidea Sea Urchin cut to show Aristotle s lantern Phylum Echinodermata Class Echinoidea Sand dollar Phylum Echinodermata Class Echinoidea Sea biscuit Phylum Echinodermata Class Ophiuroidea Basket Star Phylum Echinodermata Class Ophiuroidea Brittle Star Phylum Echinodermata Class Crinoidea Feather Star Phylum Echinodermata Class Holothuroidea Sea Cucumbers Phylum Echinodermata Class Astroidea Sea Stars Phylum Chordata Classification Subphylum Urochordata Subphylum Cephalochordata Subphylum Vertebrata Class Agnatha Class Chondrichthyes Class Osteichthyes Class Amphibia Clade Lepidosauria Four Diagnostic Features 1 Notochord 2 Dorsal hollow nerve cord dorsal alimentary canal Class Reptilia 3 Paired pharyngeal gill slits 4 Post anal tail Clade Archosauria snakes lizards and relatives Dinos Crocs and Birds Class Aves Clade Testudines turtles tortoises Clade Mammalia all mammals Phylum Chordata Subphylum Urochordata Tunicates sea squirts Phylum Chordata Subphylum Urochordata Tunicate Larva Phylum Chordata Subphylum Urochordata Tunicate Adult sedentary loses notochord Structures Gill slit Gonad Stomach Heart incurrent siphon excurrent siphon anus Phylum Chordata Subphylum Cephalochordata Amphioxus Phylum Chordata Subphylum Cephalochordata Amphioxus Structures Notochord dorsal aorta pharynx ovary endostyle gill bars Phylum Chordata Subphylum Cephalochordata Amphioxus Phylum Chordata Subphylum Vertebrata Class Agnatha Hagfish lampreys jawless fish Phylum Chordata Subphylum Vertebrata Class Chondrichthyes Cartilaginous Fish sharks skates rays Phylum Chordata Subphylum Vertebrata Class Chondrichthyes Mermaid Baskets Skate egg cases Phylum Chordata Subphylum Vertebrata Class Osteichthyes Bony Fish blow fish Phylum Chordata Subphylum Vertebrata Class Osteichthyes Sea horse Phylum Chordata Subphylum Vertebrata Class Amphibia Frog Dissection Structures Glottis esophagus heart pancreas gallbladder looks like a pea duodenum spleen large intestine blatter liver tri lobed Phylum Chordata Subphylum Vertebrata Class Amphibia Frog Reproductive System Structures Ovary Oviduct Kidney Fat bodies testes Phylum Chordata Subphylum Vertebrata Class Amphibia Salamander Phylum Chordata Subphylum Vertebrata Class Amphibia Caecilian vs earth worm these have heads with eyes and a mouth Phylum Chordata Subphylum Vertebrata Clade Lepidosauria aka Class Reptilia Snakes lizards and relatives reptiles Phylum Chordata Subphylum Vertebrata Clade Archosauria Dinosaurs crocodiles and birds class aves Phylum Chordata Subphylum Vertebrata Clade Archosauria Birds class Aves Phylum Chordata Subphylum Vertebrata Clade Testudines Turtle skull Phylum Chordata Subphylum Vertebrata Clade Mammalia Mammals Muskrat Phylum Chordata Subphylum Vertebrata Clade Mammalia Whale vertebrae Class Agnatha 1 Body Covering 2 Jaws 3 Skeleton 4 Heart chambers 5 Thermal Regulation 6 Respitarion 7 Fertilization Phylum Chordata Subphylum Vertebrata Class Agnatha 1 Skin no external armor scales 2
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