Ignatov M.S.1, Shcherbakov D.E.2 2011. Lower Triassic mosses from Yamanus (Mongolia) // Arctoa. Vol. 20: 65–80 [in English].

1 Tsitsin Main Botanical Garden of Russian Academy of Sciences, Botanicheskaya 4, Moscow 127276 Russia; e-mail: misha_ignatov@list.ru

2 Paleontological Institute, Russian Academy of Sciences, Profsoyuznaya 123, Moscow 117997 Russia, e-mail: dshh@narod.ru

KEYWORDS: mosses, fossil, Lower Triassic, Mongolia, Yaman Us.

ABSTRACT. Four moss genera are revealed in the Lower Triassic deposits of Yaman Us (Mongolia). One of them, Tricostium, was formerly described from the Upper Juras­sic. Three genera, Yamanusia, Atrichites and Palaeo­syrrho­podon, are described as a new for science. All these four genera are represented in collection by leaves with finely preserved laminal cell structure. The strong costa and relatively short lamial cells indicate their position within acrocarpous mosses.

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doi 10.15298/arctoa.20.04