Phylogeny of Chordates
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12 Terms
What is the shared derived trait for Chordata?
notochord, dorsal nerve cord, pharyngeal gill slits, muscular tail
What is the basal taxon for Chordata?
Cephalochordata
Which clades aren’t Vertebrate but under Chordata?
Cephalochordata & Urochordata
What is the SDT for vertebrae
Vertebral column (of foam/cartilage) that replaces notochord, hox clusters
What is the SDT for Gnathostomes?
Hinged Jaws, hox clusters
What is the SDT for Osteicythes?
Swim bladder, lungs, bony skeleton
What is the SDT for Lobe fins?
Lobe fins, muscular limbs/fins to help with locomotion
What is the SDT for Tetrapods?
Neck, 4 limbs, pelvic girdle, fused bones
What is the SDT for Amniota?
Ribcage, caged ventilation, Amniotic egg
What is the SDT for Mammalia?
Live young, milk, hair, layer of fat underneath the skin
What are all the groups in order?
Chordata, Vertebrata, Gnathostomia, Osteichthyes, Lobe Fins, Tetrapoda, Amniota
What is the SDT for humans?
big brain, walk upright
Note 
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