taxonID	type	description	language	source
681EA61DDF5FFFBC9CB9048EC372FAEB.taxon	description	SEM, external view (Figs 20 – 21, 40 – 42): — Valve face is almost flat, the striae are slightly deeper relative to the interstriae (Fig. 41, white arrows). These deepenings become nearly inconspicuous at the apices (Fig. 42, white arrows). The raphe is weakly eccentric. The central raphe ends are expanded (Fig. 41, black arrows) slightly deflected in different directions (better noticeable in LM). Distal raphe ends unilaterally deflected. One fissure is simple (Figs 21, 40, black arrows), another is recurved (Fig. 21, 40, white arrows). Striae mostly comprised of two rows of areolae, arranged in quincunx (Fig. 41, black arrowheads); the striae bordering the central sometimes become single-rowed towards the central part of the valve (Fig. 41, white arrowheads). Striae also become uniseriate at the valve margin (Fig. 42, white arrowheads). Areolae density 70 – 80 in 10 µm. SEM, internal view (Figs 22 – 25, 43 – 45): — The raphe slits are straight. Central raphe ends are hook-shaped (Figs 24, 44, black arrows). Distal raphe ends equipped with small helictoglossae, which are slightly deflected in the opposite directions at separate ends (Figs 23, 25, 43, 45, white arrows). Helictoglossae are located in the small hyaline area, near the adjacent striae (Figs 25, 45, asterisks). The striae are deepened into the valve face. The interstriae are noticeably wider than the striae (Figs 24, 44, white arrows). The areolae of the distichous striae are separated by vimines, forming a honeycomb-like arrangement (Figs 24 – 25, white arrowheads). The areolae of the uniseriate striae are separated by simple vimines with perpendicular struts (Fig. 24, black arrowheads). Areolae occluded by foriculotectula, represented by spear-shaped to nearly reniform outgrowths (Figs 25, 45, black arrowheads). Valve apices possess two groups of subpolar areolae, having the same structure as the transapical areolae (Fig. 25, black arrows).	en	Mironov, Andrei, Glushchenko, Anton, Maltsev, Yevhen, Nergui, Soninkhishig, Chebotaryova, Svetlana, Kulikovskiy, Maxim (2025): Paraplaconeis dorofeyukae sp. nov. (Cymbellales, Bacillariophyceae) - a new species from Mongolia, described based on molecular and morphological investigations. Phytotaxa 681 (3): 277-289, DOI: 10.11646/phytotaxa.681.3.3, URL: https://doi.org/10.11646/phytotaxa.681.3.3
681EA61DDF5FFFBC9CB9048EC372FAEB.taxon	materials_examined	Type: — Mongolia, Arkhangai Province, Tariat District, Undor Tsohen-Nuur Lake (48 ° 05.892 ’ N 099 ° 12.407 ’ E); leg. M. S. Kulikovskiy in 07 July 2015. Slide no. 03291 from oxidized culture strain no. Mnp 217, isolated from sample Mn 075, deposited in the herbarium of MHA, Main Botanical Garden, Russian Academy of Science, Moscow, Russia. Holotype specimen illustrated in Fig. 10. Isotype: — Slide no. 03291 a, deposited in the collection of Maxim Kulikovskiy at the Herbarium of the Institute of Plant Physiology Russian Academy of Sciences, Moscow, Russia. Representative specimens: — Strains Mnp 17 (slides 03291, 03291 a), Mnp 219 (slide 03282); sample Mn 075 (slide 03112). Reference strains: — Mnp 217 and Mnp 219, isolated from the sample Mn 075, deposited in the collection of Maxim Kulikovskiy at the Herbarium of the Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia.	en	Mironov, Andrei, Glushchenko, Anton, Maltsev, Yevhen, Nergui, Soninkhishig, Chebotaryova, Svetlana, Kulikovskiy, Maxim (2025): Paraplaconeis dorofeyukae sp. nov. (Cymbellales, Bacillariophyceae) - a new species from Mongolia, described based on molecular and morphological investigations. Phytotaxa 681 (3): 277-289, DOI: 10.11646/phytotaxa.681.3.3, URL: https://doi.org/10.11646/phytotaxa.681.3.3
681EA61DDF5FFFBC9CB9048EC372FAEB.taxon	description	Sequence data. Partial SSU rRNA gene sequences, V 4 region (GenBank accession number PQ 662630 for strain Mnp 217, PQ 662631 for strain Mnp 219); partial rbcL sequences (GenBank accession number PQ 736508 for strain Mnp 217, PQ 736509 for strain Mnp 219).	en	Mironov, Andrei, Glushchenko, Anton, Maltsev, Yevhen, Nergui, Soninkhishig, Chebotaryova, Svetlana, Kulikovskiy, Maxim (2025): Paraplaconeis dorofeyukae sp. nov. (Cymbellales, Bacillariophyceae) - a new species from Mongolia, described based on molecular and morphological investigations. Phytotaxa 681 (3): 277-289, DOI: 10.11646/phytotaxa.681.3.3, URL: https://doi.org/10.11646/phytotaxa.681.3.3
681EA61DDF5FFFBC9CB9048EC372FAEB.taxon	etymology	Etymology: — The specific epithet is dedicated to Dr N. I. Dorofeyuk, a prominent Russian algologist, for her contribution to understanding the diatoms of Mongolia.	en	Mironov, Andrei, Glushchenko, Anton, Maltsev, Yevhen, Nergui, Soninkhishig, Chebotaryova, Svetlana, Kulikovskiy, Maxim (2025): Paraplaconeis dorofeyukae sp. nov. (Cymbellales, Bacillariophyceae) - a new species from Mongolia, described based on molecular and morphological investigations. Phytotaxa 681 (3): 277-289, DOI: 10.11646/phytotaxa.681.3.3, URL: https://doi.org/10.11646/phytotaxa.681.3.3
681EA61DDF5FFFBC9CB9048EC372FAEB.taxon	distribution	Distribution: — As yet known only from the type locality.	en	Mironov, Andrei, Glushchenko, Anton, Maltsev, Yevhen, Nergui, Soninkhishig, Chebotaryova, Svetlana, Kulikovskiy, Maxim (2025): Paraplaconeis dorofeyukae sp. nov. (Cymbellales, Bacillariophyceae) - a new species from Mongolia, described based on molecular and morphological investigations. Phytotaxa 681 (3): 277-289, DOI: 10.11646/phytotaxa.681.3.3, URL: https://doi.org/10.11646/phytotaxa.681.3.3
681EA61DDF5FFFBC9CB9048EC372FAEB.taxon	biology_ecology	Ecology: — The species was discovered in a phytoplankton sample with alkaline pH (9.11), temperature — 17 ° C, and moderate salt content (TDS = 158 mg / l).	en	Mironov, Andrei, Glushchenko, Anton, Maltsev, Yevhen, Nergui, Soninkhishig, Chebotaryova, Svetlana, Kulikovskiy, Maxim (2025): Paraplaconeis dorofeyukae sp. nov. (Cymbellales, Bacillariophyceae) - a new species from Mongolia, described based on molecular and morphological investigations. Phytotaxa 681 (3): 277-289, DOI: 10.11646/phytotaxa.681.3.3, URL: https://doi.org/10.11646/phytotaxa.681.3.3
