Coryciinae

Coryciinae is a subtribe of orchids that has been differently defined and placed in the two classification systems that are currently in use for orchids. Genera Orchidacearum, which is currently the definitive work on orchid taxonomy, delimits Coryciinae as consisting of five genera: Disperis, Evotella, Ceratandra, Pterygodium, and Corycium, and it places Coryciinae in the mostly African tribe Diseae, along with four other subtribes: Brownleeinae, Huttonaeinae, Disinae, and Satyriinae.[1] The genera of Coryciinae are small to medium in size and the number of species in each genus is as follows: Disperis (78), Pterygodium (19), Corycium (15), Ceratandra (6), and Evotella (1).[2]

Coryciinae
Corycium orobanchoides
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Orchideae
Subtribe: Coryciinae
Benth., J. Linn. Soc., Bot. 18: 288. 21 Feb (1881).
Genera

Coryciinae was covered, along with the rest of the tribe Diseae, in volume 2 of Genera Orchidacearum, which was published in 2001. Molecular phylogenetic studies published after 2001 showed that Disperis is most closely related to Brownleea, rather than to the other genera of Coryciinae. They also showed that the tribe Diseae is paraphyletic over the tribe Orchideae.[3] The smaller version of Coryciinae, with Disperis excluded, is known as Coryciinae sensu stricto, and has 41 species. All are from southern Africa except Pterygodium ukingense, which is from Tanzania. Most are from the Cape Floristic Region. There is a second center of diversity in the Drakensberg. Coryciinae s.s. is distinct and supported by five morphological characters.[3]

In the classification for orchids that was published by Chase et alii in 2015, Disperis was transferred to the subtribe Brownleeinae and the tribe Orchideae was expanded to include the former Diseae, with Coryciinae as one of its subtribes.[2]

Coryciinae is monophyletic and consists of two strongly supported clades. One clade consists of Pterygodium alatum, Corycium carnosum, Evotella, and Ceratandra. The other clade consists of species of Pterygodium and Corycium, with Corycium nested within Pterygodium.

Coryciinae orchids secrete oil from a lip appendage on their flowers, and pollination occurs when female Rediviva bees (Melittidae) collect the oil, probably for use as a larval provision (Pauw 2006; fig. 1A). As with other orchids, pollen is placed onto precise locations on the body of the pollinator in packages called pollinaria (Pauw 2006; fig. 1B). The oil-secreting lineages of Coryciinae are largely endemic to South Africa, with two centers of diversity: a summer-rainfall area centered in the Drakensberg range and a winter-rainfall area in the Western Cape province and Namaqualand (Linder and Kurzweil 1999).

The subtribe Coryciinae was erected by George Bentham in 1881,[4][5] in preparation for the publication of a new classification of orchids in the 1883 edition of Genera Plantarum (Bentham & Hooker).[6] Using the suffixes of that time for taxonomic rank, he called it subtribe "Corycieae" of his now obsolete tribe Ophrydeae.

See also

References
  1. Alec M. Pridgeon, Phillip J. Cribb, Mark W. Chase, and Finn N. Rasmussen. 1999-2014. Genera Orchidacearum Oxford University Press. ISBN 978-0-19-850513-6 (volume 1), ISBN 978-0-19-850710-9 (volume 2), ISBN 978-0-19-850711-6 (volume 3), ISBN 978-0-19-850712-3 (volume 4), ISBN 978-0-19-850713-0 (volume 5), ISBN 978-0-19-964651-7 (volume 6)
  2. Mark W. Chase, Kenneth M. Cameron, John V. Freudenstein, Alec M. Pridgeon, Gerardo A. Salazar, Cássio van den Berg, and André Schuiteman. 2015. "An updated classification of Orchidaceae". Botanical Journal of the Linnean Society 177(2):151-174. (See External links below).
  3. Richard J. Waterman, Anton Pauw, Timothy G. Barraclough, and Vincent Savolainen. 2009. "Pollinators underestimated: A molecular phylogeny reveals widespread floral convergence in oil-secreting orchids (sub-tribe Coryciinae) of the Cape of South Africa". Molecular Phylogenetics and Evolution 51(1):100-110. doi:10.1016/j.ympev.2008.05.020.
  4. Coryciinae in International Plant Names Index. (see External links below).
  5. George Bentham. 1881. page 288. In: "Notes on Orchideae". The Journal of the Linnean Society. Botany. 18(110):281-367. (See External links below).
  6. George Bentham and Joseph Dalton Hooker. 1883. Genera Plantarum (Bentham & Hooker) volume 3, part 2, pages 460-488. L.Reeve & Co.; Williams & Norgate: London, UK. (See External links below).

<Pauw, A. 2006. Floral syndromes accurately predict pollination by a specialized oil-collecting bee (Rediviva peringueyi, Melittidae) in a guild of South African orchids (Coryciinae). American Journal of Botany 93:917–926.>

Sources

<Linder, H. P., and H. Kurzweil. 1999. Orchids of southern Africa. Rotterdam, Balkema.> First citation in article

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