New and poorly known "araphid" diatom species (Bacillariophyta) from regions near Lake Titicaca, South America and a discussion on the continued use of morphological characters in "araphid" diatom taxonomy.
| Autor: | Morales EA; Water Laboratory, University of Évora, P.I.T.E. Rua da Barba Rala No. 1, 7005-345 Évora, Portugal.; Institute of Earth Sciences - ICT, University of Évora, Rua Romão Ramalho n°. 59, 7000-671 Évora, Portugal., Wetzel CE; Observatory for Climate, Environment and Biodiversity (OCEB), Environmental Research and Innovation (ERIN) Department, Luxembourg Institute of Science and Technology (LIST), 41 rue du Brill, 4422 Belvaux, Luxembourg., Ector L; Observatory for Climate, Environment and Biodiversity (OCEB), Environmental Research and Innovation (ERIN) Department, Luxembourg Institute of Science and Technology (LIST), 41 rue du Brill, 4422 Belvaux, Luxembourg. |
|---|---|
| Jazyk: | angličtina |
| Zdroj: | PhytoKeys [PhytoKeys] 2021 Dec 13; Vol. 187, pp. 23-70. Date of Electronic Publication: 2021 Dec 13 (Print Publication: 2021). |
| DOI: | 10.3897/phytokeys.187.73338 |
| Abstrakt: | Based on two Andean Altiplano samples and on light and scanning electron microscopy analyses, we present six new species of "araphid" diatoms in the genus Pseudostaurosira , P.aedes sp. nov. , P.frankenae sp. nov. , P.heteropolaris sp. nov. , P.oblonga sp. nov. , P.occulta sp. nov. , and P.pulchra sp. nov. Additional data are provided for four other known taxa, Nanofrustulumcataractarum , N.rarissimum , P.sajamaensis and P.vulpina , the latter species corresponding to a stat. nov. based on a variety of P.laucensis . Each taxon is described morphologically and compared with closely related published taxa, using characters such as axial area, virgae, vimines, areolar shape, volae, internal striae depositions, spines, flaps and apical pore fields, which are not usually used for species distinction within the genus. It is our intention that the detailed morphological descriptions of each taxon and the elaborate comparative tables we provide serve as a basis for correction of neo and paleo-databases for the Altiplano to produce a better account of autecological data and ecological change in the region. Some arguments for our continued use of a morphologically based approach are given in the context of rapid environmental degradation in the Andes and the difficulties in applying molecular approaches in countries such as Bolivia. (Eduardo A. Morales, Carlos E. Wetzel, Luc Ector.) |
| Databáze: | MEDLINE |
| Externí odkaz: |
|