taxonID	type	description	language	source
6C7E7022FFA4E870320EFA52FB46BE82.taxon	description	Eperistomate Weissia in the Russian Far East	en	Ignatova, E. A., Fedorova, A. V., Kuznetsova, O. I., Ignatov, M. S. (2024): Notes on the genus weissia in russia focused mainly on the species from asian russia. Arctoa 33 (1): 50-60, DOI: 10.15298/arctoa.33.07, URL: https://doi.org/10.15298/arctoa.33.07
6C7E7022FFA2E872320BFC9BFB25BA24.taxon	distribution	Distribution and ecology. This is the most frequent species of Weissia in the southern Russian Far East (Amur Province, south of Khabarovsk and Primorsky Territories, and South Kuril Islands). In grows on soil banks along roads, in dry Quercus mongolica forests on slopes, in ravines, at edges of arable fields, and in flood-valley stands (willow, poplar, and alder). H I J Differentiation. Weissia planifolia is recognized by having leaves with almost plane or weakly and narrowly incurved margins in distal part; long and thin setae; and well developed, erect or slightly spreading, reddish-brown peristome teeth. In some specimens, costa is weakly papillose on dorsal surface in mid-leaf. This character is considered as diagnostic for the Japanese species W. deciduifolia K. Saito (Trichostomum deciduifolium (K. Saito) R. H. Zander); however, its costa is much denser papillose, and its leaves are strongly deciduous. The distinctions of W. planifolia from W. controversa var. controversa include weakly and narrowly vs. tightly and widely incurved leaf margins, and from W. controversa var. sachalinensis in weaker incurved leaf margins and small- er spores (16 – 20 µm vs. (19 –) 21 – 25 µm).	en	Ignatova, E. A., Fedorova, A. V., Kuznetsova, O. I., Ignatov, M. S. (2024): Notes on the genus weissia in russia focused mainly on the species from asian russia. Arctoa 33 (1): 50-60, DOI: 10.15298/arctoa.33.07, URL: https://doi.org/10.15298/arctoa.33.07
6C7E7022FFA2E872320BFC9BFB25BA24.taxon	description	Weissia controversa var. sachalinensis Ignatova & Ignatov, var. nova. Fig. 3. Diagnosis. The new variety differs from the type variety by narrower incurved upper leaf margins and larger spores, (19 –) 21 – 25 µm vs. 16 – 20 µm. Type: Russia, Sakhalin Island, Korsakovo District, Tonino-Anivsky Peninsula, outskirts of Novikovo Settlement, 46 ° 21 ’ N, 143 ° 22 ’ E, 10 m alt. N-faced rock outcrops along a stream. 15. IX. 2009. Coll O. Yu. Pisarenko op 03797. Holotype MHA 9102705, isotype NSK 2003797. Etymology. The name of variety points its distribution in Sakhalin Province of Russia (Sakhalin and Kuril Islands). Plants in small, more or less dense patches, yellowish-green. Stems 1 – 2 (– 4) mm long. Leaves crisped when dry, erect-spreading when wet, 1.4 – 2.2 × 0.25 – 0.35 mm, becoming larger distally, lanceolate to linear-lanceolate, with margins narrowly but strongly incurved in distal halves, slightly cucullate distally, with slightly widened bases; costa 35 – 50 µm wide at base, excurrent into a short mucro, smooth dorsally, ventral stereid band 1 – 2 - layered, dorsal stereid band 2 – 3 - layered, dorsal epidermis not differentiated; upper and median laminal cells quadrate and shortly transverse rectangular, moderately thick-walled, 6 – 9 × 9 – 11 µm, papillae 3 – 4 (– 5) per cell, I G 100 µm L M low, simple and bifid, obscuring cell walls; basal laminal cells rectangular, smooth, yellowish or hyaline, with moderately thickened walls, 25 – 60 × 8 – 11 µm. Autoicous. Perichaetial leaves similar to upper stem leaves. Setae 3 – 4 mm, yellowish to light brownish when mature. Urns 0.7 – 1.2 mm long, light-brown, cylindrical, weakly narrowed to the mouth. Exothecial cells thin-walled. Annuli differentiated, opercula falling off, low conic and with narrow, straight or oblique beaks ca. 0.5 mm long. Peristome well developed, peristome teeth erect when dry, lanceolate, obtuse, 90 – 100 µm long, reddish-brown, densely papillose. Spores (19 –) 21 – 25 µm.	en	Ignatova, E. A., Fedorova, A. V., Kuznetsova, O. I., Ignatov, M. S. (2024): Notes on the genus weissia in russia focused mainly on the species from asian russia. Arctoa 33 (1): 50-60, DOI: 10.15298/arctoa.33.07, URL: https://doi.org/10.15298/arctoa.33.07
6C7E7022FFA2E872320BFC9BFB25BA24.taxon	distribution	Distribution and ecology. The variety is known only from Sakhalin, Shikotan, and Kunashir Islands (see specimen data in Appendix 1). It was collected on rock outcrops along a stream, on small rocks under high grasses and in rock crevices at sea coast. The type variety was also reported to grow occasionally on rock substrates, but more frequently it grows on various soil banks. Differentiation. The distinctions from the type variety are given in the diagnosis. Another Far Eastern species with narrowly incurved leaf margins and well developed peristome is W. planifolia; it differs by having leaves with wider, subobtuse apices, weaker incurved leaf margins, longer setae (5 – 9 mm vs. 3 – 4 mm), and small- er spores (16 – 20 µm vs. (19 –) 21 – 25 µm).	en	Ignatova, E. A., Fedorova, A. V., Kuznetsova, O. I., Ignatov, M. S. (2024): Notes on the genus weissia in russia focused mainly on the species from asian russia. Arctoa 33 (1): 50-60, DOI: 10.15298/arctoa.33.07, URL: https://doi.org/10.15298/arctoa.33.07
6C7E7022FFA0E87C320EF9EDFD37BD02.taxon	distribution	Distribution and ecology. Until recently, this species was considered to be an endemic of Japan, were it is distributed in Honshu, Kyushu, Sikoku, and Okinawa. In Russia it occurs in the southern Far East (Amurskaya Province, Khabarovsk and Primorsky Territories), and in one locality in Kamchatka (Klyuchevskie volcanoes). It grows in forests on soil banks on slopes, along roads and streams, and on rocks and cliffs. Differentiation. Leaves with obtuse apices and weakly, narrowly incurved upper margins make this species similar to W. planifolia, but the latter species is readily distinguished by having a well developed peristome. Oth- er eperistomate species of Weissia with long setae occurring in Russia are W. condensa (Voit) Lindb. and W. brachycarpa (Nees & Hornsch.) Jur. The former species has leaves with stronger involute margins and stronger costae; its distribution in Russia is restricted to the European part. Weissia brachycarpa also has stronger incurved leaf margins, shorter setae, and urns clearly narrowed to the mouths.	en	Ignatova, E. A., Fedorova, A. V., Kuznetsova, O. I., Ignatov, M. S. (2024): Notes on the genus weissia in russia focused mainly on the species from asian russia. Arctoa 33 (1): 50-60, DOI: 10.15298/arctoa.33.07, URL: https://doi.org/10.15298/arctoa.33.07
6C7E7022FFA0E87C320EF9EDFD37BD02.taxon	description	— Setae 2 – 3 times longer than urns; capsules exserted 12 12. Perichaetial leaves with tightly involute upper margins; spores 16 – 21 µm .......................... W. exserta — Perichaetial leaves with weakly incurved upper margins; spores 20 – 25 µm ....................................... 13 13. Setae straight; opercula falling off, but epiphragm remaining at mouth, so spores are released through breaks of capsule walls ...................... W. squarrosa — Setae arcuate when wet; opercula differentiated but persistent, not falling off in mature capsules .......... ................ W. cf. exserta (cf. Fedosov et al., 2023.) 14 (10). Leaf margins plane or weakly incurved in distal portion; urns hardy narrowed to the mouths .......... .......................................................... W. newcomeri — Upper leaf margins widely and tightly involute; urns narrowed to the mouths ....................................... 15 15. Spores 14 – 16 (– 20) µm; costae 60 – 80 (– 100) µm wide ............................................................ W. condensa — Spores 16 – 24 µm; costae 30 – 50 µm wide .............. ........................................................ W. brachycarpa	en	Ignatova, E. A., Fedorova, A. V., Kuznetsova, O. I., Ignatov, M. S. (2024): Notes on the genus weissia in russia focused mainly on the species from asian russia. Arctoa 33 (1): 50-60, DOI: 10.15298/arctoa.33.07, URL: https://doi.org/10.15298/arctoa.33.07
