taxonID	type	description	language	source
03B1FF33990BFF91E78E9E2A548CF9FF.taxon	description	Description: cells circular in outline, almost as long as they are wide, lg.: br. 0.89 – 1.07 ×; lg. 110.0 – 112.4 µm, br. 102.8 – 125.3, isth. 19.8 µm wide, deeply narrowed, app. 29.2 µm. Dimensions of spine cells: lg. 69.2 – 74.1, br. 84.6 – 86.5 µm. Linear sine, expanding in the outer part. In terms of form, size and shape, the cells have a morphological form characteristic of the taxon, which does not differ from the nominal species and its previously registered varieties and forms. The top patch and the marginal patches of the first and further orders are shaped in accordance with the diagnostic descriptions presented in the literature (West, West, 1905, 1912; Krieger, 1939; Forster, 1982; Hirano, 1957, 1959; Palmar-Mordvintseva, 1982, 2005; Coesel, 1994; Lenzenweger, 1996, 2003; Kossinskaja, 1952; Roll, 1924, 1925). The dimensions and other features of the cell are consistent with previous diagnoses of the species.	en	KoWalski, Wojciech W. A. (2024): Micrasterias crux-melitensis Ehrenberg var. multispinosa W. W. A. KoW. var. nov. and Xanthidium fasciculatum Ehrenberg ex Ralfs var. burchardtii W. W. A. KoW. var. nov. - neW taxa for the desmidia flora from Wetland ecosystems of Western Pomerania, Poland. Annales Universitatis Paedagogicae Cracoviensis Studia Naturae 9: 33-40, DOI: 10.24917/25438832.9.2, URL: https://doi.org/10.24917/25438832.9.2
03B1FF33990BFF91E78E9E2A548CF9FF.taxon	biology_ecology	Habitat: water-reservoir interdune depression dominated by Sphagnum mosses with some mosses pH rank – 6.3 – 6.4.	en	KoWalski, Wojciech W. A. (2024): Micrasterias crux-melitensis Ehrenberg var. multispinosa W. W. A. KoW. var. nov. and Xanthidium fasciculatum Ehrenberg ex Ralfs var. burchardtii W. W. A. KoW. var. nov. - neW taxa for the desmidia flora from Wetland ecosystems of Western Pomerania, Poland. Annales Universitatis Paedagogicae Cracoviensis Studia Naturae 9: 33-40, DOI: 10.24917/25438832.9.2, URL: https://doi.org/10.24917/25438832.9.2
03B1FF33990BFF91E78E9E2A548CF9FF.taxon	distribution	Distribution in Poland: not recorded. Occurrence: Benthic, oligotrophic and mesotrophic lakes, in soft water habitats and Sphagnum bogs, intermingled with other desmids. General distribution: this form of cells has not been previously reported in the algological literature.	en	KoWalski, Wojciech W. A. (2024): Micrasterias crux-melitensis Ehrenberg var. multispinosa W. W. A. KoW. var. nov. and Xanthidium fasciculatum Ehrenberg ex Ralfs var. burchardtii W. W. A. KoW. var. nov. - neW taxa for the desmidia flora from Wetland ecosystems of Western Pomerania, Poland. Annales Universitatis Paedagogicae Cracoviensis Studia Naturae 9: 33-40, DOI: 10.24917/25438832.9.2, URL: https://doi.org/10.24917/25438832.9.2
03B1FF33990BFF91E78E9E2A548CF9FF.taxon	materials_examined	Type: Fig. 1 A.	en	KoWalski, Wojciech W. A. (2024): Micrasterias crux-melitensis Ehrenberg var. multispinosa W. W. A. KoW. var. nov. and Xanthidium fasciculatum Ehrenberg ex Ralfs var. burchardtii W. W. A. KoW. var. nov. - neW taxa for the desmidia flora from Wetland ecosystems of Western Pomerania, Poland. Annales Universitatis Paedagogicae Cracoviensis Studia Naturae 9: 33-40, DOI: 10.24917/25438832.9.2, URL: https://doi.org/10.24917/25438832.9.2
03B1FF33990BFF91E78E9E2A548CF9FF.taxon	discussion	Remarks: Analysis and review of documented descriptions of the species Micrasterias crux‑melitensis and its varieties and forms in taxonomic studies (Krieger, 1939; Forster, 1982; Růžiča, 1981; West, West, 1912; Coesel, 1985; Palmar-Mordvintseva, 1982, 2005; Prescott, et al., 1975; Roll, 1924, 1925; Coesel, Meesters, 2007) showed the walls of the cells which have not yet been recorded in the recognised algological literature, on the entire surface and in the marginal parts of the gable patch and the patches of further rows are equipped with spikes. Typically, the morphological features and ornamentation of cell walls are arranged in a very regular manner. Deviations in the arrangement and symmetrical arrangement of its elements on the cell wall suggest that the observed cell specimen of Micrasterias crux‑melitensis is probably a morphological form of the species resulting from the influence of environmental factors. The habitat in which this particular form of the taxon was recorded is distinguished by a very natural phytocoenosis and the lack of impacts resulting from anthropogenic processes.	en	KoWalski, Wojciech W. A. (2024): Micrasterias crux-melitensis Ehrenberg var. multispinosa W. W. A. KoW. var. nov. and Xanthidium fasciculatum Ehrenberg ex Ralfs var. burchardtii W. W. A. KoW. var. nov. - neW taxa for the desmidia flora from Wetland ecosystems of Western Pomerania, Poland. Annales Universitatis Paedagogicae Cracoviensis Studia Naturae 9: 33-40, DOI: 10.24917/25438832.9.2, URL: https://doi.org/10.24917/25438832.9.2
03B1FF339909FF97E7899ABE54B2FDFC.taxon	description	Description: cells elliptical in outline, much wider than long, lg.: br. 0.81 – 0.86 ×; dimensions without spikes lg. 54.3 – 55.2 µm, br. 66.7 µm, isth. 19.8 µm wide, deeply narrowed, app. 29.2 µm. Dimensions of spine cells: lg. 69.2 – 74.1, br. 84.6 – 86.5 µm. Linear sine, expanding in the outer part. Elliptical semi-cells, strongly flattened at the top of the apical part, with angularly rounded sides. Each half-cell is equipped with 6 pairs of straight, long 13.0 – 14.6 µm spines at the corners, mounted on the edges of the rounded corners. The central part of the half-cells with circular ornamentation in the form of a clear uplift, 13.0 µm in diameter in the apical part, about 7.6 – 7.0 µm high, made of distinct, regularly embedded granules; 4 in the central part, surrounded by 10 granules on the outer circle. On the outer edges of the central ornamentation of the half-cells, on the top side there is a clearly marked wavy presence of 5 granules. At the base of the half-cells, closer to their outer part, there are short extensions about 2 µm long directed towards the sinus. Viewed from the top, the cells are elliptical, with almost flat and parallel sides and rounded ends. In the central part there are half-cells with a clear ornamental circular uplift. In this part, the cells are 33.0 – 34.0 µm thick, with almost parallel wall sections 20.0 µm thick. There are visible spines on the apical surface, placed in 4 semi-cells at the rounded ends and 2 pairs symmetrically in the central part. Additionally, at the ends of the half-cells, single spines are placed alternately. The cell wall is very delicately dotted.	en	KoWalski, Wojciech W. A. (2024): Micrasterias crux-melitensis Ehrenberg var. multispinosa W. W. A. KoW. var. nov. and Xanthidium fasciculatum Ehrenberg ex Ralfs var. burchardtii W. W. A. KoW. var. nov. - neW taxa for the desmidia flora from Wetland ecosystems of Western Pomerania, Poland. Annales Universitatis Paedagogicae Cracoviensis Studia Naturae 9: 33-40, DOI: 10.24917/25438832.9.2, URL: https://doi.org/10.24917/25438832.9.2
03B1FF339909FF97E7899ABE54B2FDFC.taxon	biology_ecology	Habitat: in the benthos among other species of desmidia in open aquatic depressions in the Carici limosae‑Sphagnetum cuspidati Hueck 1925 (= Drepanoclado fluitantis‑ Caricetum limosae (Kästner et Flössner, 1933) Krisai, 1972) phytocoenosis complex (Jasnowski, Jasnowska, 1982) dominated by Sphagnum cuspidatum Ehrh. ex Hoffm. with a large share of Batrachospermum turfosum Bory, pH range 5.7 – 6.1. Oligotrophic habitat of moss bogs, in benthos together with other desmidia.	en	KoWalski, Wojciech W. A. (2024): Micrasterias crux-melitensis Ehrenberg var. multispinosa W. W. A. KoW. var. nov. and Xanthidium fasciculatum Ehrenberg ex Ralfs var. burchardtii W. W. A. KoW. var. nov. - neW taxa for the desmidia flora from Wetland ecosystems of Western Pomerania, Poland. Annales Universitatis Paedagogicae Cracoviensis Studia Naturae 9: 33-40, DOI: 10.24917/25438832.9.2, URL: https://doi.org/10.24917/25438832.9.2
03B1FF339909FF97E7899ABE54B2FDFC.taxon	distribution	Distribution in Poland: Taxon not yet recorded in phycoflora. General distribution: The distribution and occurrence of the taxon unknown.	en	KoWalski, Wojciech W. A. (2024): Micrasterias crux-melitensis Ehrenberg var. multispinosa W. W. A. KoW. var. nov. and Xanthidium fasciculatum Ehrenberg ex Ralfs var. burchardtii W. W. A. KoW. var. nov. - neW taxa for the desmidia flora from Wetland ecosystems of Western Pomerania, Poland. Annales Universitatis Paedagogicae Cracoviensis Studia Naturae 9: 33-40, DOI: 10.24917/25438832.9.2, URL: https://doi.org/10.24917/25438832.9.2
03B1FF339909FF97E7899ABE54B2FDFC.taxon	materials_examined	Type: Fig. 1 Ba and Bb.	en	KoWalski, Wojciech W. A. (2024): Micrasterias crux-melitensis Ehrenberg var. multispinosa W. W. A. KoW. var. nov. and Xanthidium fasciculatum Ehrenberg ex Ralfs var. burchardtii W. W. A. KoW. var. nov. - neW taxa for the desmidia flora from Wetland ecosystems of Western Pomerania, Poland. Annales Universitatis Paedagogicae Cracoviensis Studia Naturae 9: 33-40, DOI: 10.24917/25438832.9.2, URL: https://doi.org/10.24917/25438832.9.2
03B1FF339909FF97E7899ABE54B2FDFC.taxon	discussion	Remarks: In a review of the primary algological literature (West, West, 1912; West, Carter, 1923; Krieger, 1939; Forster, 1982; Hirano, 1957, 1959; Palmar-Mordvintseva, 1982, 2005; Coesel, 1994; Crosdale, Flint, 1988; Lenzenweger, 1997, 2003; Kossinskaja, 1952), no cells with such morphological features were recorded. No such variation was recorded in the study by Kanetsuna, Yamagishi (2018) regarding Desmidia from Southeast Asia. Some of the cells characteristics refer to Xanthidium fasciculatum Ralfs var. oronense West & West. A common feature of this variety is the presence at the base of the half-cells, closer to their outer part, of rounded outgrowths about 2 µm long, directed towards the inner side of the half-cells. They differ from the cells of this variety and the nominal species in slightly larger dimensions, both in length and width, and in shape. Important features that distinguish the taxon are the form of central ornamentation and the presence of single alternating spines, clearly visible from the top of the half-cells. They are located very symmetrically in the central part between the pairs of apical and marginal spines. The central ornamentation of the half-cells consists of 14 oval granules, arranged in two circles, 10 of which regularly surround the 4 in the centre. The shape of the half-cells is also different, they are elliptical in outline and much wider than the long ones, lg.: br. 0.81 – 0.86 ×. The nature of the accompanying phycoflora indicates a taxon associated with a mesotrophic habitat. To present the morphological differences between both described varieties, the original documentation for the species is provided below (Fig. 2 A – C).	en	KoWalski, Wojciech W. A. (2024): Micrasterias crux-melitensis Ehrenberg var. multispinosa W. W. A. KoW. var. nov. and Xanthidium fasciculatum Ehrenberg ex Ralfs var. burchardtii W. W. A. KoW. var. nov. - neW taxa for the desmidia flora from Wetland ecosystems of Western Pomerania, Poland. Annales Universitatis Paedagogicae Cracoviensis Studia Naturae 9: 33-40, DOI: 10.24917/25438832.9.2, URL: https://doi.org/10.24917/25438832.9.2
