Mamontov Y.S.1,2, Heinrichs J.3, Schäfer-Verwimp A.4, Ignatov M.S.5, Perkovsky E.E.6 2013. Hepatics from Rovno amber (Ukraine), 2. Acrolejeunea ucrainica sp. nov. // Arctoa. Vol. 22: 93–96 [in English].

1 Polar-alpine botanical garden-institute of Kola SC RAS, 184236 Kirovsk-6, Russia; e-mail:

2 Institute of North Ecological Problems, Kola Science Centre of RAS, 18а Fersmana St., Apatity, Murmansk Province, 184209 Russia

3 Systematic Botany and Mycology, Ludwig Maximilians University Munich, Menzinger Str. 67, 80638 Munich, Germany; e-mail:

4 Mittlere Letten 11, 88634 Herdwangen-Schönach, Germany; e-mail:

5 Tsitsin Main Botanical Garden of Russian Academy of Sciences, Botanicheskaya 4, Moscow 127276 Russia; e-mail:

6 Schmalhausen Institute of Zoology of the Ukrainian National Academy of Sciences, B. Khmelnitsky str., 15, Kiev 01-106, Ukraine; e-mail:

KEYWORDS: fossil, hepatics, Ptychanthoideae, Lejeuneaceae, amber, Rovno, Ukraine, Tertiary, Eocene.

ABSTRACT. A fossil of Lejeuneaceae subfam. Ptychantoideae is described based on an inclusion in Late Eocene Rovno amber. The unbranched sterile shoot has obliquely spreading, squarrose, complicate-bilobed leaves with rounded lobes and some dorsal lobe margins curved backwards as well as suberect upper shoot sectors with small leaves possibly serving for vegetative distribution. Based on morphological similarities the fossil is assigned to the extant genus Acrolejeunea, as A. ucrainica Mamontov, Heinrichs et Schaf.-Verw. sp. nov., being the first fossil of this genus and the third liverwort from Rovno amber.

doi: 10.15298/arctoa.22.13

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