Phylogeny of Chordates

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