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29 November 2016 A preliminary molecular phylogeny of the genus Riccia L. (Ricciaceae) in Australia
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Several Australian Riccia taxa have been sequenced for the first time, with the majority from the monsoon tropics of the Northern Territory, north of 18° latitude. This allowed testing of several infrageneric groupings within the genus as well as morphological species concepts. Molecular data from one nuclear and four plastid markers support the genus as a monophyletic group. However, the monophyly of the two largest subgenera, subgenus Riccia and subgenus Ricciella, are not supported, with the latter being polyphyletic and well nested within subgenus Riccia. Several currently accepted species such as Riccia inflexa and Riccia lamellosa were also found to be polyphyletic. A second tree reconstruction using only trnL–F sequences allowed comparison to several taxa collected outside of Australia. This showed that some species have a truly cosmopolitan distribution, whereas others have not.

© CSIRO 2016
D. Christine Cargill, Will C. Neal, Ish Sharma, and Cécile Gueidan "A preliminary molecular phylogeny of the genus Riccia L. (Ricciaceae) in Australia," Australian Systematic Botany 29(3), 197-217, (29 November 2016).
Received: 15 April 2016; Accepted: 1 August 2016; Published: 29 November 2016

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