That it tree represents a survey out of molecular and you will paleontological analyses from phylogeny and divergence minutes. Divergence minutes quotes are given when you look at the countless years back (MYA). The fresh new timing regarding genome duplication occurrences from the basic round (1R), second bullet (2R), while the teleost-certain third bullet (3R) is actually represented by circular rectangles. The dotted line for the union of your own agnathan lineages represents the present day suspicion regarding their divergence in accordance with the second bullet regarding genome replication.
Dating and you will divergence times of deuterostome and you can vertebrate types
There is large facts for numerous series regarding entire genome replication during the vertebrate lineages. A couple of genome replication occurrences are thought for happened around the base of the vertebrate lineages. The first genome replication feel (1R) has been proposed to take place ahead of the divergence regarding jawed and jawless vertebrates, which have one minute genome replication knowledge (2R) going on just inside the jawed vertebrates lineage . not, a newer questionnaire from multiple lamprey and hagfish gene parents determined that brand new ancestor of extant jawless vertebrates including undergone a couple of whole genome duplication incidents, indicating you to definitely two series off whole genome replication happened early regarding the vertebrate ancestry .