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Chordates Phylogeny

Terms in this set (19)

Amniotes clade derived traits
1. Amniotic egg
2. internalized fertilization
3. Ribcage ventilation
4. fully terrestrial
Amniotes clade phyla
1. Reptilia
2. Amphibia
Mammalia characteristics
1. mammary glands
2. opposed thumbs
3. fats under skin
4. endoderm with hair
5. ears that stick out
6. live birth
reptilia characteristics
scales on eggs
tetrapods phyla
Amphibia
tetrapods clade derived traits
1. Pelvic gridle
2. Neck development
3. Limbs with toes
Lobe fins phyla
1. Coelocanths
2. Lungfish
Lungfish characteristics
Lungs and gills
Lobe fins clade derived traits
Lobe fins
Osteichthyians clade phyla
1. Ray finned fish
Ray finned fish characteristics
1. swim bladders
2. bony skeleton
Gnathostomes clade phyla
1. chondrichthyes
Gnathostomes derived traits
1. hinged jaw
2. 4 hox clusters
3. bony skeleton
Chondrichthyes characteristics
1. boney skeleton
Vertebrates clade phyla
1. Jawless fish
Vertebrates derived traits
1. bone/cartilage vertebrate
2. 2+ hox clusters
Chordates clade phyla
1. Lancelets
2. Tunicates
Lancelets characteristics
1. suspension feeders
2. invertebrates
Chordates derived traits
1. notocord
2. Post anal tail
3. Dorsal Hollow nerve cord
4. pharyngeal slits
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