Koellensteinia carraoensis Garay & Dunst.

3.1. Koellensteinia carraoënsis Garay & Dunst. in Dunsterville & Garay (1976: 166). Type: — VENEZUELA. Bolívar: River Carrao, September 1955, Dunsterville 306 (holotype AMES 4456!). Fig. 6A Koellensteinia surinamensis Pabst, in sched. Original material: — unknown. Etymology:— Named after Río Carrao, in Venezuelan Guyana. Selected material examined:— FRENCH GUIANA. Cayenne: Mont Saint Marcel, 24 July 2002, De Granville et al. 15450 (K, P, U); Montagne des Nouragues, 28 March 1988, Sarthou 244 (P). SURINAME. Sipaliwini, 16 March 1949, Lanjouw & Lindeman 2748 (AMES, P, U). Distribution:— Venezuela, Suriname, French Guyana and northern Brazil: Amapá. TDWG code: 82 FRG-OO SUR-OO VEN-OO 84 BRN-AP. Diagnostic characters:— Koellensteinia carraoënsis is characterized by medium-sized plants (40–60 cm tall) and differs of K. hyacinthoides by inflorescence subequal in size to the leaf blade and erect vs. shorter than half the length of the leaf blade and arched, flowers whitish to yellow vs. yellow, petals with distal margin slightly erose vs. entire, lip lateral lobes with margin entire vs. erose, lip midlobe length longer than lateral lobes length vs. shorter, and lateral lobes of clinandrium extending beyond midlobe vs. not so extending. Nomenclatural and taxonomic notes:— For a long time Pabst identified this species as K. surinamensis, but never published this name. Here we cite it for first time, although it was not possible to find the material upon which it was based. Koellensteinia carraoënsis is a common species widespread along the Guyana Shield in floresta de terra firme (Carnevali et al. 2007), but Romero-González (2003) considered it to be endemic to Río Carrao in Venezuela.Published as part of Thiago E. C. Meneguzzo, José F. A. Baumgratz & Cássio Van Den Berg, 2015, Taxonomic studies in the Aganisia complex (Orchidaceae, Zygopetalinae), pp. 1-39 in Phytotaxa 238 (1) on page 16, DOI: 10.11646/phytotaxa.238.1.1, http://zenodo.org/record/39963