identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
AFDD82E58376585FB6365FA03967E3B3.text	AFDD82E58376585FB6365FA03967E3B3.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Halamphora lukasiewiczii M. Rybak, Peszek, Gorecka, Zadrag-Tecza, Levkov 2026	<div><p>Halamphora lukasiewiczii M. Rybak, Peszek, Górecka, Zadrąg-Tęcza, Levkov sp. nov.</p><p>Figs 4, 5, 6, 7, 8</p><p>Description.</p><p>Valve length 8.0–22.5 µm, valve width 3.0–5.0 µm (n = 100) (Fig. 4). Valves narrow, semi-lanceolate, dorsiventral with arched dorsal margin and straight to weakly tumid ventral margin (Fig. 4). Valve ends protracted, subcapitate to capitate (Figs 4, 5 A, B). Axial area narrow (Figs 5 A – E, 6 A – D). Central area absent on dorsal side, ventral side small, bordered by 4 to 6 shortened striae (Figs 5 A – E, 6 A – D). Raphe filiform and distally curved toward dorsal side (Figs 5 A – D, 6 A – C). Proximal raphe ends slightly expanded within larger surface depression (Figs 5 A – E, 6 A – D). Internally, distal raphe ends slightly deflected ventrally and terminated with helictoglossae (Figs 5 H (arrow), 6 H). Internally, proximal raphe ends terminated with fused central helictoglossae (Figs 5 G, 6 E – G). Dorsal striae fine (24–30 in 10 µm), almost parallel in middle, becoming slightly radiate towards valve apices (Fig. 4). Dorsal striae biseriate in most of cells, or occasionally partly uniseriate (Figs 5 A – D, 6 B (arrows), D). Areolae small, irregularly shaped to round (Figs 5 A, 5 B, 5 D, 6 D). On ventral side striae are uniseriate to biseriate, also with single row of longitudinal areolae, ca. 55 in 10 µm (Figs 5 A, 5 B (arrows), D (arrows), 6 B). Internally, areolae on both sides occluded by hymene and separated by slightly thickened virgae (Fig. 6 E – H). Raphe ledge (partial conopeum) well developed (sometimes reduced (Fig. 6 A)), almost linear and weakly expanded in center and near valve ends; slightly elevated from valve surface on dorsal side (Figs 5 A, 5 C – E, 6 A – D). Girdle bands numerous, each bearing two rows of large pores (Fig. 5 F – H). Chloroplast single and H-shaped (Figs 7, 8 A, B). Chloroplast isthmus located on ventral side, chloroplast lobes spread out directly under valves, giving a U- to V-shaped appearance in apical view (Fig. 8 B (arrow)). Nucleus located slightly outside center of cell (Fig. 8 D). Interior of cell mostly filled with large vacuoles (2–4), additional smaller vacuoles may be present at cell apices (Fig. 8 C). No other organelles observed.</p><p>Similar taxa.</p><p>Halamphora lukasiewiczii sp. nov. is closely related to H. angustiformis J. G. Štěpánek &amp; Kociolek, H. aponina (Kützing) Levkov, H. borealis (Kützing) Levkov, H. kenderoviana Zidarova, P. Ivanov, Dzhembekova, M. de Haan &amp; Van de Vijver, H. margalefii var. lacustris (P. Sánchez) J. G. Štěpánek &amp; Kociolek, and H. witkowskii Yilmaz, Solak &amp; Gastineau. Halamphora lukasiewiczii sp. nov. is distinguished by small, dorsiventral valves (8.5–22.5 μm length, 3.0–5.0 μm width) with exceptionally dense ventral striation (ca. 55 in 10 μm), the highest among related taxa.</p><p>Type locality.</p><p>Poland • Subcarpathian region, periphyton from wooden beams of abandoned well with brine and natural petroleum seep in <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=22.280138&amp;materialsCitation.latitude=49.603916" title="Search Plazi for locations around (long 22.280138/lat 49.603916)">Tyrawa Solna village</a>, 49°36'14.1"N, 22°16'48.5"E, collected on 17 August 2024 by Mateusz Rybak and Łukasz Peszek .</p><p>Holotype.</p><p>SZCZ MR 2632 (permanent slide) with holotype population (Fig. 4 A – K), deposited in Szczecin Diatom Collection of the University of Szczecin, Poland.</p><p>Isotype.</p><p>Isotype 1 – slide under access number 2024/ 32 in the Diatom Strain collection in Herbarium of University of Rzeszów, Isotype 2 – permanent slide under accession number MKNDC 15068 in the Macedonian National Diatom Collection .</p><p>Etymology.</p><p>The species epithet honor to Ignacy Łukasiewicz (1822–1882), an outstanding Polish pharmacist, chemist, pioneer of the oil industry, and social activist. Ignacy Łukasiewicz was the inventor of the kerosene lamp and one of the first to use oil distillation on an industrial scale.</p><p>Ecology and distribution.</p><p>Currently, the species is known only from two locations in the Subcarpathian region in Poland, where it occurs in natural oil seeps. At site 1, the species was observed only after the material collected was incubated in f / 2 medium. The species was not observed in the wild sample, which may have been due to its very rare occurrence at the site studied, the high concentration of petroleum, or the lack of sunlight blocked by the petroleum layer on the water surface (see Fig. 1 C). In case of the outflow at site 2, the species was recorded in the natural sample and reaches around 70 % share in assemblage. At this site, together with the species described, only one other diatom species, Navicula salinarum Grunow, co-occurred (Fig. 9). Since it occurred in an unusual habitat, proper species identification of N. salinarum was confirmed by phylogenetic analysis (see Molecular Phylogeny section). Observed valve length was: 22.0–44.0 µm, valve width 8.0–12.0 µm, with 15–16 striae in 10 µm.</p></div>	https://treatment.plazi.org/id/AFDD82E58376585FB6365FA03967E3B3	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Pensoft via Plazi	Rybak, Mateusz;Peszek, Łukasz;Górecka, Ewa;Zadrąg-Tęcza, Renata;Levkov, Zlatko	Rybak, Mateusz, Peszek, Łukasz, Górecka, Ewa, Zadrąg-Tęcza, Renata, Levkov, Zlatko (2026): Morphological and molecular characterization of Halamphora lukasiewiczii sp. nov. (Bacillariophyceae, Amphipleuraceae), a new extremophilic diatom from petroleum seeps in the Polish Carpathians. PhytoKeys 271: 219-239, DOI: 10.3897/phytokeys.271.182323
