Morphology of Australoneis gen. nov. and A. frenguelliae comb. nov. (Achnanthales, Bacillariophyta) from the Antarctic Peninsula
| Autor: | José María Guerrero, Juan Debandi, Gabriela Laura Campana, Katharina Zacher, Catherine Riaux-Gobin, Maria Liliana Quartino |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine religion.religious_order Morphology (linguistics) Plant Science Biology 010603 evolutionary biology 01 natural sciences 03 medical and health sciences Paleontology Genus Peninsula 14. Life underwater Bacillariophyta Cove Ecology Evolution Behavior and Systematics Taxonomy Chromista Bacillariophyceae geography geography.geographical_feature_category Biodiversity 030108 mycology & parasitology Sternum (arthropod anatomy) religion 6. Clean water Benthic zone Ultrastructure Cocconeidaceae Achnanthales |
| Zdroj: | Phytotaxa. 513:81-98 |
| ISSN: | 1179-3163 1179-3155 |
| DOI: | 10.11646/phytotaxa.513.2.1 |
| Popis: | Based on marine benthic diatoms collected at Potter Cove (Western Antarctic Peninsula), we present a detailed study, using both light and electron microscopy, of the morphology of Campyloneis frenguelliae, a species recently transferred from Cocconeis. Ultrastructural observations revealed a combination of new and unusual features within the Achnanthales: a raphe valve with different areolation patterns, a hollow valvocopula with no apparent fimbriae, and a sternum valve externally ornamented by an embossed structure, areolae occluded by hymenes mostly supported by one short peg, and multiple marginal pores that open internally into shallow valve depressions. In view of these unique set of features, we describe Australoneis gen. nov. to include Australoneis frenguelliae comb. nov. and designate a sample from Potter Cove as epitype of the latter. The main characteristics of the new genus are compared to those of its closely allied Cocconeis, Campyloneis, Xenococconeis and Amphicocconeis. |
| Databáze: | OpenAIRE |
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