Dichotomous Key/Chordata

Chordata Animalia Chordate Acanthocephala - Acoelomorpha - Annelida - Arthropoda - Brachiopoda - Chaetognatha - Chordata - Cnidaria - Ctenophora - Cycliophora - Echinodermata - Ectoprocta - Entoprocta - Gastrotricha - Gnathostomulida - Hemichordata - Kinorhyncha - Lophotrochozoa - Loricifera - Micrognathozoa - Mollusca - Myxozoa - Nematoda - Nematomorpha - Nemertea - Onychophora - Orthonectida - Phoronida - Placozoa - Platyhelminthes - Porifera - Priapulida - Rhombozoa - Rotifera - Sipuncula - Tardigrada Subphyla Cephalochordata - Myxini - Urochordata - Vertebrata 1 Vertebrae Present - #4 Not present - #2 2 Feeding method Filter - Urochordata Jawless, sucking mouth - Myxini 3 No options yet 4 Jaw Present - #5 Not present - Petromyzontidae 5 Skeletal material Cartilage - Chondrichthyes Bone - #6 6 Primary habitat (does not include secondary aquatic animals such as newts, aquatic snakes, whales, dolphins, ....) Aquatic - #10 Terrestrial or amphibious - #7 7 Metamorphosis (not within egg or womb) Present - Amphibia Not present - #8 8 Scales Present - Reptilia Not present - #9 9 Feathered wings Present - Aves Not present - Mammalia 10 Fins Lobed - #11: Sarcopterygii Rayed - Actinopterygii 11: Sarcopterygii Ability to breathe air Present - Dipnoi Not present - Actinistia __NOTOC__