Institute of Biology

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    Mycodiversity in the southwestern part of Jablanica mountain
    (Acta Musei Macedonici Scientiarum Naturalium, 2024)
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    New data on the diversity of fungi and fungus-like organisms in the coniferous forests of Shar Planina National Park with two species registered for Macedonia for the first time
    (Institute of Botany and Botanical Garden Jevremovac, Belgrade Faculty of Biology, University of Belgrade, Belgrade, Serbia www. cpb.bio.bg.ac.rs, 2026-01)
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    Considerations on the morphological features and phylogeny of the hypogeous gasteroid genera Sclerogaster and Wakefieldia (Basidiomycota) in Macedonia
    (2026-02-11)
    Tofilovska, Slavica
    ;
    Voglmayr, Hermann
    ;
    Krisai-greilhuber Irmgard
    ;
    Grebenc, Tine
    ;
    Karadelev, Mitko
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    Expanding the range: First record and redescription of the male of Limnephilus petri Marinković Gospodnetić, 1966 in R. North Macedonia
    (Institute for Biodiversity and Ecology, 2025-04-10)
    Hinić-Jordanovska, Jelena
    ;
    ;
    Ibrahimi, Halil
    ;
    Kučinić, Mladen
    ;
    Bilalli, Astrit
    Limnephilus petri, an endemic caddisfly species, is reported for the first time from the Republic of North Macedonia. This discovery expands the known distribution of the species, which has previously been observed in limited geographic areas. In this study, the redescription of the male of L. petri is provided, including detailed morphological features that aid in the species’ identification. The findings contribute significantly to the understanding of the aquatic biodiversity of the region, emphasizing the ecological importance of the species. This study also underscores the importance of continued monitoring and conservation efforts to protect such rare and specialized species.
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    The Ohrid Trout: A “Living Fossil” Endemic to Lake Ohrid Left Behind by Science
    (Multidisciplinary Digital Publishing Institute (Switzerland), 2025-12-01)
    Tânia Vieira Madureira, Maria João Rocha, Eduardo Rocha and Maja Jordanova
    The Ohrid trout (Salmo letnica) is a species endemic to Lake Ohrid (shared by Albania and North Macedonia), which is internationally recognized for its geological longevity and unique natural features. Given that the species has distinctive biological, ecological, and evolutionary characteristics, as well as significant economic value, the decline in this trout’s population is a serious and urgent problem, deserving continuous, scientifically based management. Yet, although it is considered a “Fossil Trout”, research on this species remains limited in relation to science and conservation. To understand the current state of the art, we conducted a systematic review in Web of Science, analyzing 31 indexed articles about the Ohrid trout. These studies primarily focused on the seasonal morphological characteristics of specific organs, phylogenetics, and, to a lesser extent, the impacts of environmental contamination. However, notable gaps exist in understanding sex- and stage-specific physiology, morphotype diversity, and pollutant bioaccumulation. To address these limitations, integrative strategies that combine multi-omics biomarker development, genetic screening of broodstock, and systematic monitoring of pollution and climate-related stressors are crucial. Regional authorities should work with international organizations to establish long-term monitoring of S. letnica. This review aims to provide a critical foundation for overcoming the “Living Fossil Left Behind by Science” paradigm and to foster global initiatives to preserve the long-term survival and evolutionary legacy of this endangered species.
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    Conoccurence of extraskeletal osteosarcoma and undiagnosed Paget disease in a 49-year-old female
    (Oxford University Press (OUP), 2024-12-21)
    ;
    Todorova, Teodora
    ;
    Popovska, Danica
    ;
    ;
    Angelovska, Tamara
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    The names of phyla and classes of blue-green algae (cyanobacteria, cyanophytes) and a typified name: Cyanobacteriophyta Oren, Mareš et Rippka
    (Palacky University Olomouc, 2025-10-16)
    Aleksovski, Boris
    ;
    Krstić, Svetislav
    ;
    Guiry, Michael D.
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    Molecular and cytomorphological characterization of
    <i>Pseudanabaena vesniana</i>
    sp. nov. and
    <i>Pseudanabaena suomiensis</i>
    var.
    <i>macedonica</i>
    var. nov. (Pseudanabaenales, Cyanobacteriota) with evidence of microcystin‐producing
    <i>Pseudanabaena</i>
    taxa
    (Wiley, 2025-08-14)
    Aleksovski, Boris
    ;
    Saraf, Aniket
    ;
    Stefanoska, Evgenija
    ;
    Kiprijanovska, Sanja
    ;
    Vuchurević, Ana
    Detailed molecular and cytomorphological characterization of two toxic Pseudanabaena strains (NMCCC 011 and NMCCC 012), isolated from highly polluted shallow areas of Monospitovo Marsh (North Macedonia), was performed using a “polyphasic” approach. This involved morphological and ultrastructural characterization, phylogenetic assessment of the 16S rRNA gene, analyses of the 16S–23S internal transcribed spacer (ITS) rRNA region, and investigations of the mcyB gene. The 16S rRNA gene phylogenetic analysis and the ITS rRNA region analyses confirmed that strain NMCCC 011 was a novel species for which we have proposed the name Pseudanabaena vesniana sp. nov., whereas NMCCC 012 represented a novel variety of Pseudanabaena suomiensis, here designated as P. suomiensis var. macedonica. The overall 16S rRNA gene phylogenetic analysis grouped Pseudanabaena into four large clades. Two of them comprised the primary lineages of diversification, hosting most Pseudanabaena sensu stricto infrageneric units. Most of these units formed distinctly recognizable subclades corresponding to different Pseudanabaena species (Cyanobacteriota); however, some strains were misidentified, leading to several scattered species through different subclades within the genus. Additionally, the genus Pseudanabaena was determined to be polyphyletic, with some strains clustering within the genera Tumidithrix and Thalassoporum (Cyanobacteriota). The 16S rRNA gene sequence identity within Pseudanabaena sensu stricto ranged from 95.7% to 99.9%, while the identity with Tumidithrix, Thalassoporum, and Thermostichus (Cyanobacteriota) ranged from 87.6% to 92.0%. Furthermore, both strains NMCCC 011 and NMCCC 012 produced microcystins and 2-methylisoborneol. The production of microcystins was confirmed by genetic and enzyme-linked immunosorbent assay (ELISA) analyses. Through this study, we report the presence of the mcyB gene in Pseudanabaena.
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    Expanding species diversity in the monotypic genera Thalassoporum and Tumidithrix (Pseudanabaenales, Cyanobacteriota) with the description of Thalassoporum mexicanum sp. nov. and Tumidithrix helvetica sp. nov.
    (Microbiology Society, 2025-08-19)
    Saraf, Aniket
    ;
    Aleksovski, Boris
    ;
    Blondet, Eddy
    ;
    Krstić, Svetislav
    ;
    Criscuolo, Alexis
    The taxonomic identity of two well-documented pseudanabaenalean strains, Pseudanabaena sp. PCC 7367T and Pseudanabaena sp. PCC 7403T, isolated from the samples collected from the surface of a snail shell in an intertidal zone and sphagnum bog, respectively, was reassessed using a polyphasic approach. The results from the morphological, phylogenetic, ITS rRNA and genomic analyses confirmed that PCC 7367T (=BACA0810T) and PCC 7403T (=BACA0811T) represent novel species of the monotypic pseudanabaenalean genera Thalassoporum and Tumidithrix, respectively, for which we propose the names Thalassoporum mexicanum sp. nov. and Tumidithrix helvetica sp. nov. in accordance with the International Code of Nomenclature of Prokaryotes. The analysis of the 16S-23S ITS rRNA region, a widely used genetic marker for the delineation of closely related species, effectively distinguished the Thalassoporum species. However, the closely related species within Tumidithrix could not be demarcated using the currently accepted nucleotide dissimilarity cutoff for species delineation but were clearly distinguished through genomic analyses. Accordingly, a revised ITS rRNA nucleotide dissimilarity cutoff is proposed for species delineation within the genus Tumidithrix. Furthermore, genomic investigations revealed that the predicted biosynthetic gene clusters in the genome assemblies of PCC 7367T and PCC 7403T were not associated with any known natural products.