taxonID	type	description	language	source
03E38796FFCDF525FF64FD7EFA51FB20.taxon	materials_examined	Type: — Russia, Caucasus: Republic of Adygeia, left bank of Kurdzhips River, 44 ° 04 ’ 59 ” N – 39 ° 59 ’ 59 ” E, 1495 m elev., in crevices on wet cliff, on limestone rock with admixture of single plants of Mesoptychia badensis (Gottsche ex Rabenh.) L. Söderstr. et Váňa, (2012: 52), Mesoptychia collaris (Nees) L. Söderstr. et Váňa, 2012: 53, 11 October 2007, N. A. Konstantinova & A. N. Savchenko # K 429 - 1 - 07 (holotype KPABG). GenBank # JF 421608 (trn L – trn F cpDNA), KR 063630 (trn G intron cpDNA). Plants 0.3 – 1 (1.2 just below perianth) mm wide and 4 – 8 (– 10) mm long, grass-green — to fuscous green, not branched or sparsely branched, often with single subfloral innovation, branches both terminal and intercalary. Stolons rare in nearest part of shoot. Rhizoids numerous up to the apex of shoot, light brown, (7 –) 8 – 10 μm wide, very long, many times longer than wide of shoot up to 1.3 mm. Stem in cross section rounded, 140 – 170 μm, cells in the middle isodiametric, thin walled with minute trigones, (15 –) 17 – 19 μm. Cells of dorsal side of stem distinctly elongated, 22 – 25 × 31 – 40 (– 48) μm. Leaves very obliquely inserted, imbricate, distinctly concave to cap shaped, suborbicular, on sterile shoots mostly wider than long (350) 380 – 450 (500 – 530) μm wide and (270 –) 300 – 360 (– 460) μm long, near gametangia slightly larger 500 – 530 wide × 370 – 450 μm long. Cells thin walled with distinct trigones, marginal cells 15 – 17 μm, in the middle (15 –) 17 – 20 × 19 – 25 (– 28) μm, cuticle coarsely striate-papillose. Oil bodies 2 – 3 (– 4) per cell, dark grey, large, from almost spherical 6 – 8 (– 10) μm to widely elliptical 8 – 9 × 10 – 12 (– 14) μm. Dioicous. Bracts lager than leaves 690 – 740 μm wide and 550 μm long. Perianth terminal, distinctly pluriplicate exerted from bracts for 0.5 of its length, obovoid, not beaked, with more or less rounded apex, mouth with one-celled cilia-like teeth that are (11 –) 12 – 15 (– 16) × (26 –) 45 – 54 μm, cells below mouth more or less isodiametric, 15 – 18 (– 21) × 19 – 20 (– 23) μm, perigynium absent. Perianth and immature sporophytes were present in most collected specimens, but mature sporophytes were only found in a specimen collected by G. Doroshina on Scalistyi Ridge (G 114388), so the description of capsules, spore and elaters is based on this specimen. Capsules dark brown, spherical, epidermal cells with nodular thickenings. Elaters (7 –) 8 – 9 μm wide, 3 - spiral with band to 2 μm wide; spores 12 – 16 μm, reddish-brown (Fig. 3).	en	Konstantinova, Nadezda A., Vilnet, Anna A. (2016): A new species of the genus Jungermannia (Jungermanniales, Marchantiophyta) from the Caucasus with notes on taxa delimitation and taxonomy of Jungermannia s. str. Phytotaxa 255 (3): 227-239, DOI: 10.11646/phytotaxa.255.3.4, URL: http://dx.doi.org/10.11646/phytotaxa.255.3.4
03E38796FFCDF525FF64FD7EFA51FB20.taxon	biology_ecology	Ecology: — The species is restricted to strictly calcareous (limestone) substrates. It occurs at relatively high elevation (1450 – 2090 m) mostly in crevices of rocks, between and under rocks or in grottos where air humidity is relatively high. The species usually grows creeping on rock in thin mats. Associated species are Mesoptychia spp. and Conocephalum spp.	en	Konstantinova, Nadezda A., Vilnet, Anna A. (2016): A new species of the genus Jungermannia (Jungermanniales, Marchantiophyta) from the Caucasus with notes on taxa delimitation and taxonomy of Jungermannia s. str. Phytotaxa 255 (3): 227-239, DOI: 10.11646/phytotaxa.255.3.4, URL: http://dx.doi.org/10.11646/phytotaxa.255.3.4
03E38796FFCDF525FF64FD7EFA51FB20.taxon	distribution	Distribution: — So far the species is known from the Caucasus, particularly from the republics of Adygeia, Karachaevo-Cherkessia and Dagestan (Fig. 1). Additional specimens (paratypes) studied: — Republic of Karachaevo-Cherkessia: Scalistyi Ridge, Gumbashi Mount, 43 ° 46 ’ 18 ” N – 42 ° 13 ’ 15 ” E, alt. 2065 m, N. A. Konstantinova & A. N. Savchenko # K- 402 - 8 - 10 (KPABG; GenBank accessions ## KR 063595, KR 063631); Bermamyt Mountain, 43 ° 41 ’ 21 ” N – 42 ° 27 ’ 47 ” E, alt. 2443 m, 13 July 2010, G. Doroshina, # G 114388 (KPABG); eastern Caucasus, Republic of Dagestan, Gunib Plateau northwestfacing rock outcrops, 42 ° 24 ’ 01 ” N – 46 ° 54 ’ 09 ” E, alt. 2090 m, N. A. Konstantinova, # К 60 - 9 - 11 (KPABG; GenBank accessions ## KR 063596, KR 063632). Differentiation: — The species can be confused with Jungermannia atrovirens from which it differs in 1) the generally smaller size, the width of plants without perianth usually not exceeding 0.3 – 0.5 mm; 2) the shape of the leaves that are wider than long with wide / length ratio (1.2 –) 1.3 – 1.5, with the most wider part near the middle whereas in J. atrovirens the leaves are usually longer than wide or slightly wider and more or less cordate; 3) the bracts appressed not spreading vs. spreading or erect-spreading in J. atrovirens; 4) distinct and usually relatively large trigones especially in perianth cells; and 5) 3 - spiral elaters whereas in J. atrovirens they are 1 – 2 spiral.	en	Konstantinova, Nadezda A., Vilnet, Anna A. (2016): A new species of the genus Jungermannia (Jungermanniales, Marchantiophyta) from the Caucasus with notes on taxa delimitation and taxonomy of Jungermannia s. str. Phytotaxa 255 (3): 227-239, DOI: 10.11646/phytotaxa.255.3.4, URL: http://dx.doi.org/10.11646/phytotaxa.255.3.4
03E38796FFCDF525FF64FD7EFA51FB20.taxon	etymology	Etymology: — The epithet indicates that this species is found on calcareous substrates.	en	Konstantinova, Nadezda A., Vilnet, Anna A. (2016): A new species of the genus Jungermannia (Jungermanniales, Marchantiophyta) from the Caucasus with notes on taxa delimitation and taxonomy of Jungermannia s. str. Phytotaxa 255 (3): 227-239, DOI: 10.11646/phytotaxa.255.3.4, URL: http://dx.doi.org/10.11646/phytotaxa.255.3.4
