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Taxonomy and valve ultrastructure of new and interesting freshwater fossil diatoms (Bacillariophyta) of Miocene age from the Espanola Formation of New Mexico, U.S.A. II. Description of a New Grunowia species with comments on the genus
Kociolek, J.P.; Danz, A. (2022). Taxonomy and valve ultrastructure of new and interesting freshwater fossil diatoms (Bacillariophyta) of Miocene age from the Espanola Formation of New Mexico, U.S.A. II. Description of a New Grunowia species with comments on the genus. Phytotaxa 530(3): 295-300. https://dx.doi.org/10.11646/phytotaxa.530.3.5
In: Phytotaxa. Magnolia Press: Auckland. ISSN 1179-3155; e-ISSN 1179-3163
Peer reviewed article  
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Trefwoorden
    Algae
    Taxonomic status > New taxa > New species
    Bacillariales [WoRMS]; Grunowia L. Rabenhorst, 1864 [WoRMS]
    Zoet water
Author keywords
    Algae; Bacillariales; fossil; Grunowia; Miocene; new species; scanning electron microscopy
Auteurs  Top 
  • Kociolek, J.P.
  • Danz, A.
Abstract
    We describe a new species of the diatom genus Grunowia, G. mannii Kociolek & A.Danz, sp. nov., from a Miocene fossil deposit in New Mexico, USA. The species has wide fibulae, a keel that is off-center externally, with distinct proximal raphe ends, both internally and externally. The species is differentiated from others in the genus in the narrow valves that are swollen and rounded in the center. We formally transfer two species from Nitzschia to Grunowia, making the new combinations, Grunowia constricta (Chen & Zhu) Kociolek & A.Danz, comb. nov. and Grunowia pseudosinuata (Hamilton & Laird) Kociolek & A.Danz, comb. nov. We discuss the distribution of the genus over time and space. This report from the Miocene represents the oldest known member of the genus Grunowia in the fossil record.
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