Individual group synapomorphies Flashcards
1
Q
Vertebrate Origins -> Haikouella
A
Haikouella lanceolata
Discovered ~530 mya
> 300 well-preserved specimens
Possessed:
- -Notochord
- -Pharynx
- -Dorsal hollow nerve cord (ANCESTRAL)
Muscularization and vascularization of pharyngeal arches = gills
Paired eyes (derived)
Di-partite brain - NO telencephalon (anterior lobe to make brain tripartite - VERT SYNAP)
NO cranium
Candidate sister lineage of VERTEBRATES
