TY  - CONF
AU  - Vidaković, Danijela
AU  - Hamilton, Paul
AU  - Levkov, Zlatko
PY  - 2019
UR  - https://www.ced2019.lu/fileadmin/files/Documents/CED_2019_abstractbook.pdf
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4652
AB  - Freshwater diatom species Placoneis elginensis (W.Gregory) E.J.Cox was originally described in 1856 as Pinnularia elginensis W.Gregory. Because it is often confused with other species, its distribution requires closer investigation. The Placoneis elginensis species complex includes taxa with elliptic-lanceolate to linear-lanceolate valve shapes and capitate to rostrate apices. At present, six taxa are known from this complex: P. elginensis, P. paraelginensis Lange-Bertalot, P. abiskoensis (Hustedt) Lange-Bertalot & Metzeltin, P. ignorata (Schimanski) Lange-Bertalot, P. rostrata (A.Mayer) E.J.Cox and P. undulata (Østrup) Lange-Bertalot. Most of these taxa are widely distributed and rarely found in high numbers. They can occur in habitats with different environmental conditions, but mostly, they prefer mesotrophic to eutrophic waters with medium electrolyte content. During observations of different habitats (lakes, ponds, streams, wetlands, peat bogs) throughout North Macedonia seven species were recorded. In Taor cannel (near the city of Skopje), on mud, one new species from this complex was observed. It is characterized by elliptic-lanceolate valves with distinctly capitate apices, broad central area and distantly spaced striae (10–12 in 10 µm). All seven species are illustrated with LM and SEM and their morphological features are compared. Additionally, shape analyses of all species have been performed using software DiaOutline. For visualization and statistical evaluations, Principal Component Analyses (PCA), and Linear Discriminant Analyses (LDA) were used. Results showed that all analyzed species are significantly different with respect to the valve shape. Important separating features for the identification of species from this complex include valve shape, valve margin, shape of the valve apices and stria density.
PB  - Belvaux, Luxembourg : Luxembourg Institute of Science and Technology
C3  - Programme and book of abstracts - 12th Central European Diatom Meeting
T1  - Morphological variation within the Placoneis elginensis (W.Gregory) E.J.Cox species complex
SP  - 58
EP  - 58
UR  - https://hdl.handle.net/21.15107/rcub_cer_4652
ER  - 

@conference{
author = "Vidaković, Danijela and Hamilton, Paul and Levkov, Zlatko",
year = "2019",
abstract = "Freshwater diatom species Placoneis elginensis (W.Gregory) E.J.Cox was originally described in 1856 as Pinnularia elginensis W.Gregory. Because it is often confused with other species, its distribution requires closer investigation. The Placoneis elginensis species complex includes taxa with elliptic-lanceolate to linear-lanceolate valve shapes and capitate to rostrate apices. At present, six taxa are known from this complex: P. elginensis, P. paraelginensis Lange-Bertalot, P. abiskoensis (Hustedt) Lange-Bertalot & Metzeltin, P. ignorata (Schimanski) Lange-Bertalot, P. rostrata (A.Mayer) E.J.Cox and P. undulata (Østrup) Lange-Bertalot. Most of these taxa are widely distributed and rarely found in high numbers. They can occur in habitats with different environmental conditions, but mostly, they prefer mesotrophic to eutrophic waters with medium electrolyte content. During observations of different habitats (lakes, ponds, streams, wetlands, peat bogs) throughout North Macedonia seven species were recorded. In Taor cannel (near the city of Skopje), on mud, one new species from this complex was observed. It is characterized by elliptic-lanceolate valves with distinctly capitate apices, broad central area and distantly spaced striae (10–12 in 10 µm). All seven species are illustrated with LM and SEM and their morphological features are compared. Additionally, shape analyses of all species have been performed using software DiaOutline. For visualization and statistical evaluations, Principal Component Analyses (PCA), and Linear Discriminant Analyses (LDA) were used. Results showed that all analyzed species are significantly different with respect to the valve shape. Important separating features for the identification of species from this complex include valve shape, valve margin, shape of the valve apices and stria density.",
publisher = "Belvaux, Luxembourg : Luxembourg Institute of Science and Technology",
journal = "Programme and book of abstracts - 12th Central European Diatom Meeting",
title = "Morphological variation within the Placoneis elginensis (W.Gregory) E.J.Cox species complex",
pages = "58-58",
url = "https://hdl.handle.net/21.15107/rcub_cer_4652"
}

Vidaković, D., Hamilton, P.,& Levkov, Z.. (2019). Morphological variation within the Placoneis elginensis (W.Gregory) E.J.Cox species complex. in Programme and book of abstracts - 12th Central European Diatom Meeting
Belvaux, Luxembourg : Luxembourg Institute of Science and Technology., 58-58.
https://hdl.handle.net/21.15107/rcub_cer_4652

Vidaković D, Hamilton P, Levkov Z. Morphological variation within the Placoneis elginensis (W.Gregory) E.J.Cox species complex. in Programme and book of abstracts - 12th Central European Diatom Meeting. 2019;:58-58.
https://hdl.handle.net/21.15107/rcub_cer_4652 .

Vidaković, Danijela, Hamilton, Paul, Levkov, Zlatko, "Morphological variation within the Placoneis elginensis (W.Gregory) E.J.Cox species complex" in Programme and book of abstracts - 12th Central European Diatom Meeting (2019):58-58,
https://hdl.handle.net/21.15107/rcub_cer_4652 .

TY  - JOUR
AU  - Vidaković, Danijela
AU  - Levkov, Zlatko
AU  - Hamilton, Paul
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4544
AB  - The genus Neidiopsis is small comprising eight known taxa distributed in oligotrophic to dystrophic freshwater habitats.
During observations of diatoms from alpine intermittent ponds on the Shara Mountain, Republic of North Macedonia,
a species of Neidiopsis with high abundance was observed. It is characterized by linear to linear–lanceolate valves with
a slightly undulated margin, 25.0–43.5 μm long and 6.0–7.0 μm wide. The raphe is filiform with straight proximal and
deflected distal raphe endings to the same side of the valve. Striae are partly biseriate near the axial area and continue as
uniseriate circular areolae (ca 40 in 10 μm) towards the valve mantle. Striae on each side of the valve are crossed by a
prominent longitudinal line located slightly closer to the valve margin. Ultrastructural features of the type population clearly
place this taxon into the genus Neidiopsis and aligned to N. levanderi sensu stricto. A similar documented ecotype population
(N. levanderi “calcicola”) sensu Lange-Bertalot (2001) is combined with our population and considered a new species N.
borealis sp. nov.
PB  - Magnolia Press
T2  - Phytotaxa
T1  - Neidiopsis borealis sp. nov., a new diatom species from the mountain Shar Planina, Republic of North Macedonia
VL  - 402
IS  - 1
SP  - 21
EP  - 28
DO  - 10.11646/phytotaxa.402.1.3
ER  - 

@article{
author = "Vidaković, Danijela and Levkov, Zlatko and Hamilton, Paul",
year = "2019",
abstract = "The genus Neidiopsis is small comprising eight known taxa distributed in oligotrophic to dystrophic freshwater habitats.
During observations of diatoms from alpine intermittent ponds on the Shara Mountain, Republic of North Macedonia,
a species of Neidiopsis with high abundance was observed. It is characterized by linear to linear–lanceolate valves with
a slightly undulated margin, 25.0–43.5 μm long and 6.0–7.0 μm wide. The raphe is filiform with straight proximal and
deflected distal raphe endings to the same side of the valve. Striae are partly biseriate near the axial area and continue as
uniseriate circular areolae (ca 40 in 10 μm) towards the valve mantle. Striae on each side of the valve are crossed by a
prominent longitudinal line located slightly closer to the valve margin. Ultrastructural features of the type population clearly
place this taxon into the genus Neidiopsis and aligned to N. levanderi sensu stricto. A similar documented ecotype population
(N. levanderi “calcicola”) sensu Lange-Bertalot (2001) is combined with our population and considered a new species N.
borealis sp. nov.",
publisher = "Magnolia Press",
journal = "Phytotaxa",
title = "Neidiopsis borealis sp. nov., a new diatom species from the mountain Shar Planina, Republic of North Macedonia",
volume = "402",
number = "1",
pages = "21-28",
doi = "10.11646/phytotaxa.402.1.3"
}

Vidaković, D., Levkov, Z.,& Hamilton, P.. (2019). Neidiopsis borealis sp. nov., a new diatom species from the mountain Shar Planina, Republic of North Macedonia. in Phytotaxa
Magnolia Press., 402(1), 21-28.
https://doi.org/10.11646/phytotaxa.402.1.3

Vidaković D, Levkov Z, Hamilton P. Neidiopsis borealis sp. nov., a new diatom species from the mountain Shar Planina, Republic of North Macedonia. in Phytotaxa. 2019;402(1):21-28.
doi:10.11646/phytotaxa.402.1.3 .

Vidaković, Danijela, Levkov, Zlatko, Hamilton, Paul, "Neidiopsis borealis sp. nov., a new diatom species from the mountain Shar Planina, Republic of North Macedonia" in Phytotaxa, 402, no. 1 (2019):21-28,
https://doi.org/10.11646/phytotaxa.402.1.3 . .

TY  - JOUR
AU  - Levkov, Zlatko
AU  - Vidaković, Danijela
AU  - Cvetkoska, Aleksandra
AU  - Mitic-Kopanja, Danijela
AU  - Krstić, Svetislav
AU  - van de Vijver, Bart
AU  - Hamilton, Paul Brian
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4404
AB  - Background and aims – An increased interest in the diatom flora from subaerial habitats in the Republic of North Macedonia has revealed the presence of a large number of interesting and often unknown, species. During a recent biodiversity survey, seven Muelleria species were recorded, several of which could not be identified based on the available literature. Methods – Using both Light Microscopy and Scanning Electron Microscopy techniques, the morphology of several Muelleria species has been analysed. The morphology of all taxa is described, illustrated and compared with other possible similar Muelleria taxa, known worldwide. Key results – Four already documented Muelleria species, M. gibbula, M. islandica, M. terrestris and M. undulata (= Navicula gibbula f. undulata) were identified, while two distinct species are described as new. These new species belong to the M. gibbula complex, and can be differentiated by valve size, stria density, shape of the proximal raphe ends and the shape of external areola foramina. The identity of one taxon remains uncertain due to a low number of observed specimens in the samples. As their ultrastructure is almost entirely unknown, they are briefly discussed. Conclusions – The diversity of Muelleria in Europe and the North Hemisphere is most likely underestimated and some of the previous records of M. gibbula belong to other species. Observations of diatoms from “extreme” habitats such as intermittent ponds, wet mosses and soils can reveal the existence of interesting and new species.
PB  - Belgique : Societe Royale de Botanique de Belgique
T2  - Plant Ecology and Evolution
T1  - Observations of the genus muelleria (bacillariophyceae) from the Republic of north Macedonia
VL  - 2019
IS  - 152
SP  - 293
EP  - 312
DO  - 10.5091/plecevo.2019.1611
ER  - 

@article{
author = "Levkov, Zlatko and Vidaković, Danijela and Cvetkoska, Aleksandra and Mitic-Kopanja, Danijela and Krstić, Svetislav and van de Vijver, Bart and Hamilton, Paul Brian",
year = "2019",
abstract = "Background and aims – An increased interest in the diatom flora from subaerial habitats in the Republic of North Macedonia has revealed the presence of a large number of interesting and often unknown, species. During a recent biodiversity survey, seven Muelleria species were recorded, several of which could not be identified based on the available literature. Methods – Using both Light Microscopy and Scanning Electron Microscopy techniques, the morphology of several Muelleria species has been analysed. The morphology of all taxa is described, illustrated and compared with other possible similar Muelleria taxa, known worldwide. Key results – Four already documented Muelleria species, M. gibbula, M. islandica, M. terrestris and M. undulata (= Navicula gibbula f. undulata) were identified, while two distinct species are described as new. These new species belong to the M. gibbula complex, and can be differentiated by valve size, stria density, shape of the proximal raphe ends and the shape of external areola foramina. The identity of one taxon remains uncertain due to a low number of observed specimens in the samples. As their ultrastructure is almost entirely unknown, they are briefly discussed. Conclusions – The diversity of Muelleria in Europe and the North Hemisphere is most likely underestimated and some of the previous records of M. gibbula belong to other species. Observations of diatoms from “extreme” habitats such as intermittent ponds, wet mosses and soils can reveal the existence of interesting and new species.",
publisher = "Belgique : Societe Royale de Botanique de Belgique",
journal = "Plant Ecology and Evolution",
title = "Observations of the genus muelleria (bacillariophyceae) from the Republic of north Macedonia",
volume = "2019",
number = "152",
pages = "293-312",
doi = "10.5091/plecevo.2019.1611"
}

Levkov, Z., Vidaković, D., Cvetkoska, A., Mitic-Kopanja, D., Krstić, S., van de Vijver, B.,& Hamilton, P. B.. (2019). Observations of the genus muelleria (bacillariophyceae) from the Republic of north Macedonia. in Plant Ecology and Evolution
Belgique : Societe Royale de Botanique de Belgique., 2019(152), 293-312.
https://doi.org/10.5091/plecevo.2019.1611

Levkov Z, Vidaković D, Cvetkoska A, Mitic-Kopanja D, Krstić S, van de Vijver B, Hamilton PB. Observations of the genus muelleria (bacillariophyceae) from the Republic of north Macedonia. in Plant Ecology and Evolution. 2019;2019(152):293-312.
doi:10.5091/plecevo.2019.1611 .

Levkov, Zlatko, Vidaković, Danijela, Cvetkoska, Aleksandra, Mitic-Kopanja, Danijela, Krstić, Svetislav, van de Vijver, Bart, Hamilton, Paul Brian, "Observations of the genus muelleria (bacillariophyceae) from the Republic of north Macedonia" in Plant Ecology and Evolution, 2019, no. 152 (2019):293-312,
https://doi.org/10.5091/plecevo.2019.1611 . .