Words to Describe chordates

How chordates often is described ("________ chordates")

• simplest
• fishlike
• simple
• primitive
• ancestral
• dwelling
• most
• representative
• lower
• jawless
• higher
• advanced
• lowly
• aquatic
• terrestrial
• vertebrate
• lowest
• marine
• prevertebrate
• invertebrate
• true
• day
• like
• putative
• earliest
• typical
• extant
• basal
• fossil
• ordovician
• early
• swimming
• other
• developed
• earlier