Números cromossômicos em Kleberiella V.P. Castro & Cath. (Orchidaceae, Oncidiinae) e gêneros afi ns RESUMO (Números cromossômicos em Kleberiella V.P. Castro & Cath. (Orchidaceae, Oncidiinae) e gêneros afi ns). Este trabalho teve como objetivo principal realizar a análise citotaxonômica de espécies fi logeneticamente relacionadas dentro dos gêneros Kleberiella, Alatiglossum e Neoruschia com base na determinação dos seus números cromossômicos a partir dos seus meristemas radiculares. Foram obtidos os números cromossômicos de todas as espécies de Kleberiella (seis espécies), Neoruschia (monoespecífi co) e de quatro das nove espécies conhecidas para Alatiglossum stricto sensu. Exceto para K. longipes, A. barbatum e A. micropogon, os quais corroboram com resultados anteriores, todos os outros números cromossômicos são inéditos. A contagem cromossômica se mostrou como um caráter taxonômico útil na delimitação de Alatiglossum fuscopetalum (2n = 52) e do gênero Neoruschia (2n = 48) das outras espécies analisadas. Entretanto não se mostrou efi ciente para delimitação entre as espécies de Kleberiella (todas com 2n = 56) e para separar este gênero de Alatiglossum no qual a maioria das espécies analisadas apresentou 2n = 56. O numero básico sugerido para Alatiglossum e Kleberiella é x = 28 e para Neoruschia x = 24. Th is work aimed to provide cytotaxonomical analysis of species phylogenetically related within the genera Kleberiella, Alatiglossum and Neoruschia based on the determination of chromosome numbers from root meristems. We obtained the chromosome numbers of all species of Kleberiella (six species), Neoruschia (monospecifi c) and four of the nine known species of Alatiglossum stricto sensu. Except for K. longipes, A. barbatum and A. micropogon, which corroborate previous results, all other chromosome numbers are unpublished. Chromosome counting proved useful as a taxonomic character in the delimitation of Alatiglossum fuscopetalum (2n = 52) and the genus Neoruschia (2n = 48) from the other species analyzed. However it was not effi cient for delimitation between Kleberiella species (all with 2n = 56) and to separate this genus from Alatiglossum in which most of the species studied had 2n = 56. Th e provable basic number for Alatiglossum and Kleberiella is x = 28 and for Neoruschia x = 24. Palavras-chave:
We propose new combinations in the genus Gomesa, to accommodate species previously assigned to Baptistonia. These are needed according to recent phylogenetic studies.
The occurrences of nine species of Orchidaceae belonging to six genera: Alatiglossum (2 species), Baptistonia (2), Cattleya (1), Encyclia (2), Promenaea (1) and Stelis (1) are noted here for the first time in Serra do Cipó, Minas Gerais state, Brasil. Morphological characters of the genera are briefly described. These new records highlight the importance to preserve the area.
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