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MONOGRAFÍA DE FRULLANIA SUBGÉNERO METEORIOPSIS (FRULLANIACEAE, MARCHANTIOPHYTA) / Monograph of Frullania subgenus Meteoriopsis (Frullaniaceae, Marchantiophyta)

Jaime Uribe Meléndez
Caldasia
Vol. 30, No. 1 (Junio 30 de 2008), pp. 49-94
Stable URL: http://www.jstor.org/stable/23642044
Page Count: 46
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
MONOGRAFÍA DE FRULLANIA SUBGÉNERO METEORIOPSIS (FRULLANIACEAE, MARCHANTIOPHYTA) / Monograph of Frullania subgenus Meteoriopsis (Frullaniaceae, Marchantiophyta)
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Abstract

El subgénero Meteoriopsis incluye plantas muy delgadas, en su mayoría de hábito péndulo, que crecen al interior de los bosques andinos. La delimitación del subgénero ha sido muy confusa debido al valor que se ha dado al hábito más que a los caracteres morfológicos que lo definen: Hojas con dos aurículas en la base y convolutas alrededor del tallo. Ha sido tratado como subgénero independiente (Spruce, 1884; Stephani, 1911; Verdoorn, 1930; Stotler, 1969; Hattori, 1977), como sección del subgénero Thyopsiella (Hattori, 1972; 1974) o incluso como un "grupo" dentro de éste último subgénero (Vanden Berghen, 1976). Se presenta el tratamiento monográfico de Frullania subgénero Meteoriopsis, se reconocen 7 especies, incluyendo dos recientemente descritas (Uribe, 2004c, 2006); se circunscribe su distribución al neotrópico; todas las especies descritas del paleotrópico son transferidas a otros subgéneros. Se provee una clave taxonómica para la identificación de las especies. Cada especie es descrita, ilustrada y se presentan mapas de distribución. Se discute la posición del subgénero Meteoriopsis dentro del género Frullania, mediante un análisis filogenético basado en caracteres morfológicos. Se concluye que el subgénero Meteoriopsis es monofilético y grupo hermano del subgénero Thyopsiella. Se excluyen del subgénero 66 especies de las cuales 35 pasan a la sinonimia. Frullania subgenus Meteoriopsis is composed of very slender and for the most part pendulous plants that grow mostly in Andean forests. The definition of the subgenus has been confusing due to the high taxonomic value given by several authors to the growing habit of its species and not to the actual diagnostic morphological characters: leaves convoluted around the stem and with two auricles at base. The group has been treated as a subgenus, as a section of subgenus Thyopsiella, and even as a "group" within this subgenus. A taxonomic treatment of Frullania subgenus Meteoriopsis is presented; seven species are recognized including two recently described. Its distribution is now considered to be Neotropical with all paleotropical species previously included in the subgenus being transferred to other subgenera. A taxonomic key for the identification of the species is provided. Each species is described and illustrated including distribution maps. The taxonomic position of subgenus Meteoriopsis within Frullania is discussed on the basis of a phylogenetic analysis carried out using morphological characters. The subgenus Meteoriopsis is considered to be monophyletic and sister to subgenus Thyopsiella. A total of 66 species are either excluded from the subgenus or (35) placed in synonymy.

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