Editing Nothofagus (section)

===Subgenera===
Four subgenera are recognized, based on morphology and DNA analysis:<ref name="Heenan-2013"/>
* Subgenus ''Fuscospora'', six species (''N. alessandri, N. cliffortioides, N. fusca, N. gunnii, N. solandri'', and ''N. truncata'') in New Zealand, Tasmania, and southern South America.
* Subgenus ''Lophozonia'', seven species (''N. alpina, N. cunninghamii, N. glauca, N. macrocarpa, N. menziesii, N. moorei'', and ''N. obliqua'') in New Zealand, Australia, and southern South America.
* Subgenus ''Nothofagus'', five species (''N. antarctica, N. betuloides, N. dombeyi, N. nitida'', and ''N. pumilio'') in southern South America. 
* Subgenus ''Brassospora'' (or ''Trisyngyne''), 20 accepted species (''N. aequilateralis, N. balansae, N. baumanniae, N. brassii, N. carrii, N. codonandra, N. crenata, N. discoidea,  N. flaviramea, N. grandis, N. nuda, N. perryi, N. pseudoresinosa, N, pullei, N. recurva, N. resinosa, N. rubra, N. starkenborghiorum, N. stylosa'', and ''N. womersleyi'') in New Guinea and New Caledonia.

In 2013, [[Peter Brian Heenan]] and [[Rob D. Smissen]] proposed splitting the genus into four, turning the four recognized subgenera into the new genera ''Fuscospora'', ''Lophozonia'' and ''Trisyngyne'', with the five South American species of subgenus ''Nothofagus'' remaining in genus ''Nothofagus''.<ref name="Heenan-2013">{{cite journal | last1 = Heenan | first1 = P.B. | last2 = Smissen | first2 = R.D. | year = 2013 | title = Revised circumscription of ''Nothofagus'' and recognition of the segregate genera ''Fuscospora'', ''Lophozonia'', and ''Trisyngyne'' (Nothofagaceae) | journal = Phytotaxa | volume = 146 | issue = 1| pages = 1–31 | doi = 10.11646/phytotaxa.146.1.1 | doi-access = free | bibcode = 2013Phytx.146....1H }}</ref> The proposed new genera are not accepted at the [[World Checklist of Selected Plant Families]].<ref name="KewChecklist" /><ref>{{cite journal | last1 = Hill | first1 = RS |authorlink1=Robert Hill (botanist)| last2 = Jordan | first2 = GJ | last3 = Macphail | first3 = MK | year = 2015 | title = Why we should retain ''Nothofagus sensu lato'' | journal = Australian Systematic Botany | volume = 28 | issue = 3| pages = 190–193 | doi=10.1071/sb15026| bibcode = 2015AuSyB..28..190H | s2cid = 83733526 }}</ref>