Dichotomous Key/Chordata

Dichotomous Key: Chordata Kingdom: Animalia Phylum: Chordata Information related to Chordata Wikipedia Wikispecies Wikicommons

Parent key: Animalia Phyla 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 Key: Chordata 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