02274nas a2200277 4500008004100000245014900041210006900190260001200259300001200271490000700283520139800290653003201688653001501720653002001735653001201755653002001767653000901787653002401796653001301820100002701833700002201860700002101882700002201903700002301925856004801948 2016 eng d00aEvolution of Australian Cryptocarya (Lauraceae) based on nuclear and plastid phylogenetic trees: evidence of recent landscape-level disjunctions0 aEvolution of Australian Cryptocarya Lauraceae based on nuclear a c10/2016 a157-1660 v293 a

Species-level relationships within the pantropical, largely rainforest genus Cryptocarya R.Br (Lauraceae) and allied groups have long been problematic. Here, we utilise nuclear RPB2 and plastid trnL–trnF sequence data to reconstruct the phylogenetic relationships among Australian Cryptocarya species. We relate our findings to the previous two disparate attempts to resolve species-level relationships on the basis of traditional taxonomic tools. Our results showed that an early diversification gave rise to two lineages present in Australia and globally. The loss of cataphylls (bract-like leaves in seedlings) seems to be a derived state only found in the larger of these two clades. Ruminate cotyledons is another potentially informative character; however, it is highly likely that this condition arose through convergent or parallel evolution. Little or no molecular variation was observed between many species, which suggests recent diversification. Furthermore, the close relationships between species from two geographically disjunct centres of rainforest diversity within Australia suggests that loss of between-region connectivity is recent. A global revision of the group, incorporating molecular analyses and seedling and fruit morphology, is needed to untangle the complex evolutionary relationships within this genus.

10aAustralian rainforest flora10acataphylls10adiversification10alaurels10aribbed endocarp10aRPB210aruminate cotyledons10atrnL–F1 avan der Merwe, Marlien1 aCrayn, Darren, M.1 aFord, Andrew, J.1 aWeston, Peter, H.1 aRossetto, Maurizio uhttps://lauraceae.myspecies.info/node/2034502587nas a2200301 4500008004100000245014200041210006900183300001000252490000700262520164000269653003001909653001701939653002901956653002101985653001402006653002402020100002102044700001302065700002402078700001602102700002102118700002202139700001802161700002702179700001902206700001202225856004802237 2016 eng d00aOrigins and evolution of cinnamon and camphor: A phylogenetic and historical biogeographical analysis of the Cinnamomum group (Lauraceae)0 aOrigins and evolution of cinnamon and camphor A phylogenetic and a33-440 v963 a

Tropical and subtropical amphi-Pacific disjunction is among the most fascinating distribution patterns, but received little attention. Here we use the fossil-rich Cinnamomum group, a primarily tropical and sub-tropical Asian lineage with some species distributed in Neotropics, Australasia and Africa to shed light upon this disjunction pattern. Phylogenetic and biogeographic analyses were carried out using sequences of three nuclear loci from 94 Cinnamomum group and 13 outgroup samples. Results show that although there are three clades within a monophyletic Cinnamomum group, Cinnamomum and previously recognized subdivisions within this genus were all rejected as natural groups. The Cinnamomum group appears to have originated in the widespread boreotropical paleoflora of Laurasia during the early Eocene (ca. 55 Ma). The formation and breakup of the boreotropics seems to have then played a key role in the formation of intercontinental disjunctions within the Cinnamomum group. The first cooling interval (50–48 Ma) in the late early Eocene resulted in a floristic discontinuity between Eurasia and North America causing the tropical and subtropical amphi-Pacific disjunction. The second cooling interval in the mid-Eocene (42–38 Ma) resulted in the fragmentation of the boreotropics within Eurasia, leading to an African–Asian disjunction. Multiple dispersal events from North into South America occurred from the early Eocene to late Miocene and a single migration event from Asia into Australia appears to have occurred in the early Miocene.

10aAmphi-Pacific disjunction10aBiogeography10aBoreotropical paleoflora10aCinnamomum group10aLauraceae10amolecular phylogeny1 aHuang, Jian-Feng1 aLi, Lang1 avan der Werff, Henk1 aLi, Hsi-Wen1 aRohwer, Jens, G.1 aCrayn, Darren, M.1 aMeng, Hong-Hu1 avan der Merwe, Marlien1 aConran, J., G.1 aLi, Jie uhttps://lauraceae.myspecies.info/node/20320