Hepatics from Rovno amber (Ukraine), 7. Frullania zerovii, sp. nov.
A new fossil species of the extant liverwort genus Frullania is described and illustrated based on a single inclusion in a piece of Rovno amber (Ukraine). The species is characterized by: 1) somewhat triangular rounded leaf lobes, 2) leaf lobules contiguous to and parallel with the stem, forming a widely clavate to obovate watersac distinctly constricted above the mouth, strongly inflated above the constriction, widest in the upper third, with the mouth more or less flattened at the sides, turning outward the stem, with semicircular mouth margins; 3) bifid underleaves armed with several blunt teeth or angulations along the margins of apical half. The studied fossil plant differs sufficiently from morphologically similar species preserved in Rovno, Baltic and Bitterfeld amber and is therefore described as new to science. The shape of the lobules and underleaves as well as the absence of ocelli indicate an affiliation to the extant F. subg. Frullania, and show similarity with fossil and extant species of section Australes of that subgenus, though other characters contradict this placements. Certain similarities of the new species with F. subg. Meteoriopsis, F. subg. Thyopsiella and F. subg. Microfrullania (F. varians) are discussed, the two latter being also represented in the Eocene amber inclusions.
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Document Type: Research Article
Publication date: February 1, 2018
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- Nova Hedwigia is an international journal publishing original, peer-reviewed papers on current issues of taxonomy, morphology, ultrastructure and ecology of all groups of cryptogamic plants, including cyanophytes/cyanobacteria and fungi. The half-tone plates in Nova Hedwigia are known for their high quality, which makes them especially suitable for the reproduction of photomicrographs and scanning and transmission electron micrographs.
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