Phylogeny of the Orchidoideae is volatile and still subject to change. Historically, the Orchidoideae have been partitioned into up to 6
tribes, including
Orchideae,
Diseae,
Cranichideae,
Chloraeeae,
Diurideae, and
Codonorchideae. However, the most recent
molecular phylogenetics analysis led by Chase et al. in 2015 and subsequently by Chen et al. in 2017 indicates that the Orchidoideae should be split into 4 tribes: the Orchideae, Cranichideae, Diurideae, and Codonorchideae. ===
Codonorchideae === This monophyletic tribe consists of only one genus,
Codonorchis, found in
South America. (a nonsystematic paraphyletic splitting), the Orchideae now comprise 6 subtribes. Along with previous molecular studies, Chase et al's 2015 analysis confirmed that Diseae was a
polyphyletic grouping. Consequently, the former subtribes of Diseae have been redistributed within the Orchideae (for instance,
Satyrium is now classified in the Orchidinae). In his 2015 study Chase recommended further study of historically problematic genera in the former Diseae such as
Huttonaea and Pachites. Further molecular analysis by Chen et al. in 2017 led to the following reorganization: '', a member of the Orchidinae }} ===
Diurideae === The Diurideae, a predominantly Australasian tribe, retain their previous subtribal organization and comprise 9 taxa: '', a member of the Diuridinae •
Acianthinae (monophyletic) •
Caladeniinae (polyphyletic) •
Cryptostylidinae (monophyletic) •
Diuridinae (monophyletic) •
Drakaeinae (monophyletic) •
Megastylidinae (monophyletic) •
Prasophyllinae (monophyletic) •
Rhizanthellinae (monophyletic) •
Thelymitrinae (monophyletic) == References ==