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stonewort

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stonewort

(stōn′wûrt′, -wôrt′)
n.
Any of various submerged aquatic algae of the family Characeae that are frequently encrusted with calcium carbonate deposits and have nodes with whorled, filamentlike branchlets.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
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References in periodicals archive
The oosporangium of the Characeae (Chlorophyta, Charales).
Taxonomic reexamination of 17 species of Nitella subgenus Tieffallenia (Charales, Charophyceae) based on internal morphology of the oospore wall and multiple DNA marker sequences.
Taxonomy of Nitella (Charales, Charophyceae) based on comparative morphology of oospores and multiple DNA marker phylogeny using cultured material.
Finalmente, se podrian plantear estrategias adecuadas para su cultivo, si se considera el alimento vivo que se suministre en las diferentes etapas del desarrollo de los charales, de ahi que el objetivo de este trabajo fue determinar si el charal Menidia humboldtiana selecciona su alimento, y si es asi, sobre que generos la realiza, y establecer si existe traslape en la dieta entre las diferentes tallas del charal.
Para recolectar los peces se utilizo un chinchorro de 8 mm de luz de malla, los charales fueron fijados con formol al 10% para detener los procesos digestivos.
De los doce generos encontrados en el embalse solo Bosmina, Mastigodiaptomus, Daphnia y Ceriodaphnia fueron consumidos por los charales.
Lee (1999) also cited McCourt's (1995) analysis of a compilation of molecular-genetic results (e.g., small and large subunit rRNA sequences and the corresponding, encoding rDNA) that indicated a more direct relationship of embryophytes (which, not specified) with the Charales (e.g., Chara, Nitella) than with Coleochaete, Klebsormidiales, or the Zygnematales.
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