Utriculidium durvillei (Bory?) Skottsberg en isla Rey Jorge, Antártica
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Date
1992
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Abstract
Utriculidium durvillei (Bory?) Skottsberg, es un alga parda citada para las costas subantárticas. Estudios de material de herbario revelan que esta especie es confundida con frecuencia con Adenocystis utricularis (Bory) Skottsberg, otra feofícea presente en aguas subantárticas y antárticas. Ambas especies son morfológicamente similares, aunque difieren en sus estructuras reproductivas: Adenocystis presenta esporangios uniloculares, en tanto que Utriculidium presenta zooidangios pluriloculares. Numerosos talos de Adenocystis a menudo se encuentran infectados con Myrionema, una feofícea endóflta que forma zooidangios pluriloculares, lo cual contribuye también a identificaciones erróneas. Especímenes correspondientes a la descripción de Skottsberg de Utriculidium durvillei fueron recolectados de material varado en la isla Rey Jorge, Antártica. Se postula que estos ejemplares serían de origen subantártico y su presencia en aguas antárticas sería sólo accidental, pudiendo ser arrastrados a estas costas como material a la deriva.
Utriculidium durvillei (Bory?) Skottsberg is a marine brown algae reported from subantarctic coasts. Studies on herbarium material showed that it is often mixed up with Adenocystis utricularis. This species is a very common inhabitant of subantarctic and antarctic coasts. Both species are morphologically similar and differ only by their reproductive structures: Unilocular sporangia in Adenocystis, and plurilocular zoidangia in Utriculidium. Many Adenocystis thalli are infected with Myrionema, an endophyte which forms plurilocular zoidangia in the cortex of the host, which may also contribute to misidentification. Specimens corresponding to Skottsberg' s description of Utriculidium durvillei were found as drift material in King George Island, Antarctica. It is suggested that these plants are of subantarctic origin and were displaced by long range drift.
Utriculidium durvillei (Bory?) Skottsberg is a marine brown algae reported from subantarctic coasts. Studies on herbarium material showed that it is often mixed up with Adenocystis utricularis. This species is a very common inhabitant of subantarctic and antarctic coasts. Both species are morphologically similar and differ only by their reproductive structures: Unilocular sporangia in Adenocystis, and plurilocular zoidangia in Utriculidium. Many Adenocystis thalli are infected with Myrionema, an endophyte which forms plurilocular zoidangia in the cortex of the host, which may also contribute to misidentification. Specimens corresponding to Skottsberg' s description of Utriculidium durvillei were found as drift material in King George Island, Antarctica. It is suggested that these plants are of subantarctic origin and were displaced by long range drift.
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Keywords
Alga parda, Utriculidium durvillei (Bory?) Skottsberg, Phaeophyceae
Citation
Serie Científica, nº 42, pp. 47-52, 1992