Four new monoraphid diatom species (Bacillariophyta, Achnanthaceae) from the Maritime Antarctic Region

Kopalová, Kateřina; Zidarova, Ralitsa; Vijver, Bart Van de

doi:10.5852/ejt.2016.217

Cited by 396 publications

(3 citation statements)

References 18 publications

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“…Within Planothidium, several types can be distinguished based on the structure of the rapheless valve: species with a hoof-mark (occasionally capped) depression on the RL valve (lanceolatum-type), small (maximum valve length <12 µm) species with a continuous striation pattern on the RL valve (granum-type) and large species (minimum valve length > 12 µm) with a continuous striation pattern on the RL valve (delicatulum-type). Most species in the Antarctic Region belong to the lanceolatum-type [e.g., P. cyclophorum (Heiden) Van de Vijver, P. rostrolanceolatum Van de Vijver et al, P. frequentissimum (Lange-Bertalot) Lange-Bertalot, P. aueri (Krasske) Lange-Bertalot) or the granum-type (e.g., P. quadripunctatum (Oppenheim) Sabbe, P. renei (Lange-Bertalot et Rol.Schmidt) Van de Vijver, P. wetzelectorianum Kopalová et al] (Van de Vijver et al 2002Kopalová et al 2016).…”

Section: Discussionmentioning

confidence: 99%

Analysis of the type material of Planothidium delicatulum (Bacillariophyta) with the description of two new Planothidium species from the sub-Antarctic Region

Vijver¹,

Wetzel²,

Éctor³

2018

Fottea

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During a survey of the freshwater diatom flora on the sub-Antarctic islands of the southern Indian Ocean, two new Planothidium species were observed, showing some resemblance to Planothidium delicatulum. Therefore, the type material of Achnanthidium delicatulum Kützing was analysed, a common species in northern hemisphere waterbodies that was later transferred to the genus Planothidium. Additionally the material of Types du Synopsis des Diatomées de Belgique n° 234, designated in 1980 as neotype for Achnanthes delicatula was investigated. This analysis showed that the population in Types n° 234 is not conspecific with Achnanthidium delicatulum but in fact is a population of Planothidium galaicum. Both Planothidium species in the investigated Antarctic material are described as new to science: P. lilianeanum Van de Vijver sp. nov. and P. australodelicatulum Van de Vijver, C.E.Wetzel et Ector sp. nov. The new species can be differentiated based on differences in valve outline, presence of ridges and silica outgrowths on the rapheless valve, the structure of the raphe and the shape and size of the central area. Notes on the ecology and distribution of the new Antarctic species are added. Achnanthidium delicatulum is formally lectotypified.

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Section: Discussionmentioning

confidence: 99%

Analysis of the type material of Planothidium delicatulum (Bacillariophyta) with the description of two new Planothidium species from the sub-Antarctic Region

Vijver¹,

Wetzel²,

Éctor³

2018

Fottea

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“…Since the past two decades a great effort was made to revise the freshwater and terrestrial Maritime Antarctic diatom flora, we now have a better understanding of the actual diatom diversity ( Zidarova, Kopalová & Van de Vijver, 2016 and references therein). Based on the obtained results, several taxa are now known to be associated with increased nutrients, mainly of biotic origin, such as Psammothidium superpapilio Kopalová, Zidarova & Van de Vijver (2016) , Humidophila australoshetlandica Kopalová, Zidarova & Van de Vijver ( Kopalová et al, 2015 ), Luticola olegsakharovii Zidarova, Levkov & Van de Vijver (2014) and Pinnularia austroshetlandica (G.W.F.Carlson) A.Cleve ( Zidarova, Kopalová & Van de Vijver, 2012 ).…”

Section: Introductionmentioning

confidence: 97%

The influence of penguin activity on soil diatom assemblages on King George Island, Antarctica with the description of a new Luticola species

Kochman-Kędziora

Noga

Olech

et al. 2022

PeerJ

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Background Ice-free areas in the Antarctic region are strongly limited. The presence of marine mammals and birds in those areas influence soil properties and vegetation composition. Studies on the terrestrial diatom flora in soils influenced by sea birds in the Maritime Antarctic region are scarce. Methods Samples were collected from two transects on the western shore of the Admiralty Bay region. Light and scanning electron microscopic observations and statistical analyses were conducted to consider the impact of penguin rookeries on soil diatom assemblages. Results The disturbance associated with the presence of penguin rookeries clearly influences the soil diatom diversity. Assemblages from areas with the highest nutrient input were characterized by a much lower diversity with only few species dominating the flora. One of recorded taxa could not be assigned to any of the known species. Therefore, based on the combination of morphological features analyzed using light and scanning electron microscopes and comparison with similar taxa in the Antarctic region and worldwide, the species is described hereby as new to science–Luticola kaweckae sp.nov. The new species is characteristic for soil habitats with strong penguin influence.

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“…Monoraphid diatoms represent a highly diverse group of non-marine diatoms in the sub-Antarctic Region (Van de Vijver et al 2002;Le Cohu 2005;Kopalová et al 2016;Zidarova et al 2016). Originally belonging to either the genus Achnanthes s.l.…”

Section: Introductionmentioning

confidence: 99%

Revision of the Psammothidium manguinii complex (Bacillariophyta) in the sub-Antarctic Region with the description of four new taxa

Vijver¹

2019

Fottea

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Psammothidium manguinii is a common constituent of the limnoterrestrial diatom flora of the Antarctic Region. The species shows a broad variability in several morphological and morphometrical features such as valve outline, valve width, striation pattern and length/width ratio. Analysis of the type material of Achnanthes manguinii, described by Hustedt in 1952, and A. manguinii var. elliptica, described by Manguin two years later, together with an analysis of a large number of P. manguinii populations from the sub-Antarctic Region (with samples from all major islands in the southern Atlantic, Indian and Pacific Ocean), resulted in a clear morphological revision of the species. Four new species are described, P. acutomanguinii sp. nov., P. antarcticum sp. nov., P. mannensianum sp. nov. and P. hodgsonii Van de Vijver et Verleyen sp. nov., whereas the former variety elliptica is brought to species level: P. ellipticomanguinii nom. et stat. nov. The morphology, ecology and distribution of all species are discussed and a morphological comparison is made.

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Four new monoraphid diatom species (Bacillariophyta, Achnanthaceae) from the Maritime Antarctic Region

Abstract: Abstract. Four monoraphid taxa belonging to the genera Achnanthes, Psammothidium and Planothidium were found during the ongoing taxonomic revision of the freshwater and limno

Cited by 396 publications

References 18 publications

Analysis of the type material of Planothidium delicatulum (Bacillariophyta) with the description of two new Planothidium species from the sub-Antarctic Region

Analysis of the type material of Planothidium delicatulum (Bacillariophyta) with the description of two new Planothidium species from the sub-Antarctic Region

The influence of penguin activity on soil diatom assemblages on King George Island, Antarctica with the description of a new Luticola species

Revision of the Psammothidium manguinii complex (Bacillariophyta) in the sub-Antarctic Region with the description of four new taxa

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