* M. collaris (Nees) L. Söderstr. & Váňa [ Mesoptychia collaris (Nees) Schljakov] (per, and.)

– 2, 5, 8, 9, 12 (6: 634– 926 m), sp.: carbonate rock outcrops in tundra, on fine earth at the bottom and between rocks, on rocks in the bed and on banks of dry mossy brook [121172], always mixed with other bryophytes, particularly Blepharostoma trichophyllum subsp. brevirete, Tritomaria scitula, Odontoschisma macounii, Saccobasis polymorpha, Preissia quadrata, Syntrichia norvegica, Distichium capillaceum . It was collected once in a herbs-moss-liverwort community in a snowbed, mixed with Neoorthocaulis floerkei and Lophozia wenzelii .