Diurideae

Diurideae
Orthoceras strictum
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Diurideae
(Endl.) Lindl. ex Meisn., Pl. Vasc. Gen.: Tab. Diagn. 387, Comm. 289. (1842)
Type genus
Diuris
Sm.
Subtribes

Diurideae is a tribe of orchid in the subfamily Orchidoideae. The tribe has a centre of diversity in Australia, with occasional dispersals to New Zealand, New Calendonia, Papua New Guinea, and Malesia. [1][2]

Infratribal classification

While Diurideae itself is a well-supported clade, relationships among its constituent subtribes remain equivocal, likely due to the confounding effects of incomplete lineage sorting. [1] The tribe has previously been subdivided into nine subtribes: Acianthinae; Caladeniinae; Cryptostylidinae; Diuridinae; Drakaeinae; Megastylidinae; Prasophyllinae; Rhizanthellinae; and Thelymitrinae.[2] However, phylogenomic analyses have shown that Megastylidinae is best subsumed into an expanded Drakaeinae.[1] Rhizanthellinae has also been treated as a synonym of Prasophyllinae. [2][1]

Evolution and Ecology

The tribe is estimated to have originated in the Eocene (c. 52Ma), with a crown age of c. 46 Ma. [1] The tribe is known for an unusually high number of species which engage in sexually deceptive pollination, particularly in the subtribes Caladeniinae and Drakaeinae.[2][3] Additionally, members of the Diurideae appear to have a high degree of fungal symbiont specificity, with orchid species partnering with an average of only one to two fungal species. [1][4]

Genera

Diurideae contains about 40 accepted genera.[5] Chase et al. (2015) accepted the following genera.[5] Some have since been combined.

References

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  1. ^ a b c d e f O'Donnell, RP; Wong, DCJ; Phillips, RD; Peakall, R; Linde, CC (2024). "Discordance Down Under: Combining phylogenomics and fungal symbioses to detangle difficult nodes in a diverse tribe of Australian terrestrial orchids". Systematic Biology. 74 (3): 434–452. doi:10.1093/sysbio/syae070.
  2. ^ a b c d Weston, P; Perkins, A; Indsto, J; Clements, M (2014). "Phylogeny of Orchidaceae tribe Diurideae and its implications for the evolution of pollination systems". In Edens-Meier, R; Bernhardt, P (eds.). Darwin's Orchids: Then and Now. University of Chicago Press. pp. 91–154. ISBN 978-0-226-04491-0.
  3. ^ Peakall, R (2023). "Pollination by sexual deception". Current Biology. 33 (11): R489–R496. doi:10.1016/j.cub.2023.02.066.
  4. ^ Warcup, JH (1981). "The mycorrhizal relationships of Australian orchids". New Phytologist. 87 (2): 371–381. doi:10.1111/j.1469-8137.1981.tb03208.x.
  5. ^ a b Chase, M.W.; Cameron, K.M.; Freudenstein, J.F.; Pridgeon, A.M.; Salazar, G.; van den Berg, C. & Schuiteman, A. (2015), "An updated classification of Orchidaceae", Botanical Journal of the Linnean Society, 177 (2): 151–174, doi:10.1111/boj.12234
  6. ^ "Caladenia". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew. Archived from the original on November 25, 2020.
  7. ^ "Paracaleana". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.


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