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Cerro Duida
Cerro Duida, also known as Cerro Yennamadi, is a very large tepui in Amazonas state, Venezuela.〔 It has an uneven and heavily inclined plateau, rising from highs of around in the north and east to a maximum of on its southwestern rim.〔Huber, O. (1995). Geographical and physical features. In: P.E. Berry, B.K. Holst & K. Yatskievych (eds.) ''Flora of the Venezuelan Guayana. Volume 1. Introduction.'' Missouri Botanical Garden Press, St. Louis. pp. 1–61.〕 It has a summit area of and an estimated slope area of .〔 At its foot lies the small settlement of La Esmeralda, from which the mountain can be climbed.〔Tate, G.H.H. & C.B. Hitchcock (January 1930). The Cerro Duida region of Venezuela. ''Geographical Review'' 20(1): 31–52. 〕
Cerro Duida shares a common base with the much smaller (but taller) Cerro Marahuaca, located off its northeastern flank, and together they form the Duida–Marahuaca Massif.〔 Both tepuis are entirely within the bounds of Duida–Marahuaca National Park. Sandwiched between them, a massive ridge known as Cerro Petaca rises to at least . The much lower Cerro Huachamacari, derived from a separate base, lies to the northwest of this complex.〔
==Tyler-Duida expedition==
George Henry Hamilton Tate led a major expedition of the American Museum of Natural History to Cerro Duida in 1928–1929.〔〔 Named the Tyler-Duida Expedition, it was the first to reach the mountain's summit plateau and the first to climb a tepui of the Venezuelan Amazon.〔 Mount Duida frog was first collected during the expedition and is still not known from anywhere else, although it was formally described only 40 years later. Although primarily a zoological expedition, much plant material was collected.〔Huber, O. (1995). History of botanical exploration. In: P.E. Berry, B.K. Holst & K. Yatskievych (eds.) ''Flora of the Venezuelan Guayana. Volume 1. Introduction.'' Missouri Botanical Garden Press, St. Louis. pp. 63–95.〕 These herbarium collections were studied extensively by Henry Gleason, who formally described many of the mountain's plant species in a series of papers published in 1931.〔Gleason, H.A. (May 1931). Botanical results of the Tyler-Duida Expedition. ''Bulletin of the Torrey Botanical Club'' 58(5): 277–344. 〕〔Gleason, H.A. (June 1931). Botanical results of the Tyler-Duida Expedition. ''Bulletin of the Torrey Botanical Club'' 58(6): 345–404. 〕〔Gleason, H.A. (October 1931). Botanical results of the Tyler-Duida Expedition. ''Bulletin of the Torrey Botanical Club'' 58(7): 405–464. 〕〔Gleason, H.A. (November 1931). Botanical results of the Tyler-Duida Expedition. ''Bulletin of the Torrey Botanical Club'' 58(8): 465–506. 〕 This was followed by a number of important botanical explorations of Cerro Duida, first by Julian A. Steyermark in 1944 and later by Bassett Maguire in 1949 and 1950.〔〔Huber, O. (1995). Vegetation. In: P.E. Berry, B.K. Holst & K. Yatskievych (eds.) ''Flora of the Venezuelan Guayana. Volume 1. Introduction.'' Missouri Botanical Garden Press, St. Louis. pp. 97–160.〕
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