Editing Phylogenetic tree (section)

=== Chronogram ===
A chronogram is a phylogenetic tree that explicitly represents time through its branch lengths.<ref name="Santamaria2009">{{Cite journal |last1=Santamaria |first1=R. |last2=Theron |first2=R. |date=2009-05-26 |title=Treevolution: visual analysis of phylogenetic trees |journal=Bioinformatics |volume=25 |issue=15 |pages=1970–1971 |doi=10.1093/bioinformatics/btp333 |pmid=19470585 |doi-access=free}}</ref>
[[File:Phylogenetic chart of Lepidoptera chronogram.svg|thumb |upright=1.35|A chronogram of [[Lepidoptera]].<ref>{{Cite journal |last1=Labandeira |first1=C. C. |last2=Dilcher |first2=D. L. |last3=Davis |first3=D. R. |last4=Wagner |first4=D. L. |date=1994-12-06 |title=Ninety-seven million years of angiosperm-insect association: paleobiological insights into the meaning of coevolution |journal=Proceedings of the National Academy of Sciences |language=en |volume=91 |issue=25 |pages=12278–12282 |doi=10.1073/pnas.91.25.12278 |issn=0027-8424 |pmc=45420 |pmid=11607501 |bibcode=1994PNAS...9112278L |doi-access=free}}</ref> In this phylogenetic tree type, branch lengths are proportional to geological time.]]