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Pseudohepatica duidensis : a new lichen from the Venezuelan Amazonas

  • The species Pseudohepatica duidensis Marcano, Palacios & Morales is described from the Venezuelan Amazonas. Special attention has been paid to the morphology and the chemistry (e.g. polysaccharides and secondary compounds), using scanning electron microscopy (SEM), thin-layer chromatography (TLC, HPTLC) and iodine reagent tests. Pseudohepatica duidensis is characterized by a very small (to 1 mm long), yellowish-green thallus, non-pored epicortex, yellowish lower surface with soredial protuberances, paraplectenchymatous upper cortex consisting of strongly sclerotic cells, cell walls with iodine reactions characteristic of lichenan and gyrophoric acid as relevant chemical constituent.
  • Se describe la especie Pseudohepatica duidensis Marcano, Palacios & Morales procedente del Amazonas Venezolano. Una atención especial es puesta en la morfología y en la química (e.g. polisacáridos y compuestos secundarios), utilizando microscopía electrónica de barrido (SEM), cromatografía de capa fina (TLC, HTLC) y pruebas con reactivos de yodo. Pseudohepatica duidensis está caracterizada por presentar un talo pequeño (hasta 1 mm de largo), verdo-amarillento, epicortex no-poreado, superficie inferior amarillenta mostrando protuberancias sorediales, y cortex superior paraplectenquimatoso consistiendo de células fuertemente esclerotizadas, paredes celulares con reacciones de yodo características de liquenina, y ácido girofórico como constituyente químico relevante.

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Metadaten
Author:Vicente Marcano, Ernesto Palacios-PrüGND, Antonio Morales
URN:urn:nbn:de:hebis:30:3-304261
ISSN:0935-5626
Parent Title (English):Tropical bryology
Publisher:D. Quandt, Univ. Bonn, Nees Inst. für Biodiversität d. Pflanzen
Place of publication:Bonn
Document Type:Article
Language:English
Year of Completion:2000
Year of first Publication:2000
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2013/07/31
Issue:18
Page Number:10
First Page:203
Last Page:212
Note:
The layout of the electronic version of this contribution differs from the layout of the original version published in the printed volume. Page numbers given in the metadata refer to the electronic version. Page numbers of the original version of this contribution in the printed volume are: 203-211.
HeBIS-PPN:34921154X
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 58 Pflanzen (Botanik) / 580 Pflanzen (Botanik)
Sammlungen:Sammlung Biologie / Sondersammelgebiets-Volltexte
Zeitschriften / Jahresberichte:Tropical Bryology / Tropical Bryology, Volume 18 (2000)
:urn:nbn:de:hebis:30:3-301515
Licence (German):License LogoDeutsches Urheberrecht