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- Title
Molecular circumscription, intrafamilial relationships and biogeography of the Gondwanan liverwort family Pallaviciniaceae (Hepaticophytina, Bryophyta) Studies in austral temperate rain forest bryophytes 27.
- Authors
Schaumann, F.; Frey, W.; Pfeiffer, T.; Stech, M.
- Abstract
Maximum parsimony and maximum likelihood analyses based on partialtrnL intron sequences of 60 specimens of the Gondwanan liverwort family Pallaviciniaceae, and 23 representatives of other families of the Metzgeriidae, resolve the Pallaviciniaceae as monophyletic, albeit with low bootstrap support, with the Hymenophytaceae as their sistergroup in the likelihood tree. These data and further analyses of the Pallaviciniacean taxa only, based on thetrnTUGU-trnLUAA spacer,trnLUAA 5'exon andtrnLUAA intron of the chloroplast DNA and the ITS2 of the nuclear ribosomal DNA, support a separation ofMoerckia(Moerckioideae) from the remaining genera. An unexpected close relationship betweenPodomitrium(Podomitrioideae) and the Symphyogynoideae is observed, whereasPallaviciniaand the Pallavicinioideae are polyphyletic. WithinSymphyogyna, well-supported clades comprising the species with dendroid and prostrate-lobate thalli on the one hand and species with prostrate-undivided thalli on the other hand (exceptS. tenuinervis, includingSymphyogynopsis) are distinguished. According to the molecular data, evolution of the dendroid life-form occurred three times independently in the Metzgeriidae, inSymphyogyna,Jensenia, andHymenophyton.
- Subjects
PALLAVICINIACEAE; METZGERIALES; LIVERWORTS; BRYOPHYTES; PLANT classification; PLANT evolution
- Publication
Plant Systematics & Evolution, 2005, Vol 252, Issue 1/2, p27
- ISSN
0378-2697
- Publication type
Article
- DOI
10.1007/s00606-004-0279-z