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Ecological and chorological novelties of the genus Leptogium in the Iberian Peninsula

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New data on the ecology, taxonomy and distribution of eight interesting species of Leptogium are provided in Spain. Besides, the information was compared, analyzed and discussed with the previously obtained from other parts of Europe. The presence of L. burnetiae in southern zones of the Mediterranean Region can be due to the special climatic conditions (abundance of rainfall) of some localities. L. cretaceum, a species restricted to southern Europe, is cited for the first time in the Iberian Peninsula. L. diffractum is new to Spain. L. imbricatum is cited for the first time in south-west of Europe, on medium-high mountains and far for presenting its artic-alpine distribution pattern. The anatomical and morphological characters of L. intermedium with the similar L. gelatinosum were compared. L. magnussonii grows under two different ecological conditions: on bark, in southern Europe (Spain and Portugal) and on humid siliceous rocks in central and northern Europe. Specimens of L. microphylloides develop an untypical very reduced thalli, that it can be explained by the climatic conditions of the zone where they were found. Finally, L. subtile is new to Spain.

Se aportan nuevos datos sobre la ecología y distribución de ocho especies de Leptogium muy poco conocidas en España. Además, esta información es analizada, discutida y comparada con los datos obtenidos para estas especies en el resto de Europa. La presencia de L. burnetiae en áreas meridionales de la Región Mediterránea es explicada por las especiales condiciones climáticas que tienen ciertos enclaves (elevadas precipitaciones). L. cretaceum es una especie restringida al sur de Europa que, sin embargo, se cita por primera vez en la Península Ibérica. Se aporta la primera cita para España de L. diffractum. L. imbricatum se herboriza por primera vez en zonas montañosas del suroeste de Europa lejos de su patrón de distribución ártico-alpino. Se establecen las diferencias anatómicas y morfológicas entre L. intermedium y L. gelatinosum. L. magnussonii es hallado en Europa bajo dos hábitats bien diferenciados y en condiciones ecológicas distintas: sobre corteza, en el suroeste de Europa (España y Portugal) y sobre rocas silíceas húmedas, en el centro y norte del continente. Las condiciones climáticas donde fueron hallados los ejemplares de L. microphylloides pueden explicar el extremadamente reducido tamaño del talo. Por último, L. subtile se cita por por primera vez en España.
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Document Type: Research Article

Publication date: May 1, 2004

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  • Nova Hedwigia is an international journal publishing original, peer-reviewed papers on current issues of taxonomy, morphology, ultrastructure and ecology of all groups of cryptogamic plants, including cyanophytes/cyanobacteria and fungi. The half-tone plates in Nova Hedwigia are known for their high quality, which makes them especially suitable for the reproduction of photomicrographs and scanning and transmission electron micrographs.
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