02392nas a2200157 4500008004100000245009100041210006900132260001200201300001200213490000700225520188900232100002302121700002102144700002102165856004802186 2016 eng d00aPhylogenetic study of the genus Nectandra (Lauraceae), and reinstatement of Damburneya0 aPhylogenetic study of the genus Nectandra Lauraceae and reinstat c10/2016 a980-9960 v653 a

Earlier studies indicated that the genus Nectandra, currently the second-largest genus of the Neotropical Lauraceae, might be diphyletic in its traditional circumscription, but the evidence was not quite conclusive. Our phylogenetic analyses based on nuclear (ITS) and chloroplast (psbA-trnH) sequences of 45 Nectandra species as well as 42 representatives of 18 genera of the core Lauraceae (Ocotea complex, Laureae, Aiouea, Asian Cinnamomum and Persea groups) confirm the suspicion that Nectandra is diphyletic. The two groups, Nectandra s.str. and the N. coriacea group, are each well supported in the maximum parsimony and Bayesian analyses, but they are not sister to each other. Nectandra s.str. is sister to Pleurothyrium, and the clade including Nectandra s.str. and Pleurothyrium is very likely closer to the dioecious taxa of the Ocotea complex. The N. coriacea group, on the other hand, appears to be closer to bisexual taxa known as the Ocotea helicterifolia group. In addition, Nectandra s.str. is characterized by a large deletion in the psbA-trnH spacer compared to all other core Lauraceae, including its sister group Pleurothyrium. Considering these facts, Nectandra cannot be maintained in the traditional sense. We therefore transfer the species of the N. coriacea group to the oldest generic name applied to this group, Damburneya . On the basis of fossil records from the American subcontinents and in accordance with previous phylogenetic and molecular clock studies we suggest a scenario of a climate-driven migration from North to South America, with a subsequent rapid radiation of Nectandra s.str. in South America.

1 aTrofimov, Dimitrij1 aRudolph, Barbara1 aRohwer, Jens, G. uhttps://lauraceae.myspecies.info/node/2034600356nas a2200121 4500008004100000245003700041210003500078260001200113300001200125490000600137100002300143856006800166 1977 eng d00aStudies of American plants - XIV0 aStudies of American plants XIV c05/1977 a331-3510 v51 aLundell, Cyrus, L. uhttp://www.biodiversitylibrary.org/item/15467#page/347/mode/1up00327nas a2200109 4500008004100000245003500041210003300076300001100109490000600120100002300126856006800149 1969 eng d00aStudies of American plants - I0 aStudies of American plants I a97-1280 v41 aLundell, Cyrus, L. uhttp://www.biodiversitylibrary.org/item/15466#page/106/mode/1up