Australian Systematic Botany Australian Systematic Botany Society
Taxonomy, biogeography and evolution of plants
RESEARCH ARTICLE

Pseudoheterocaryum, a new genus segregated from Heterocaryum (Boraginaceae) on the basis of molecular data

Nasim Saadati A , Maryam Khoshsokhan Mozaffar B , Mahboubeh Sherafati A and Shahrokh Kazempour Osaloo A C
+ Author Affiliations
- Author Affiliations

A Department of Plant Biology, Faculty of Biological Sciences, Tarbiat Modares University, 14115-154 Tehran, Iran.

B Department of Biology, Islamic Azad University, Qom Branch, Qom, Iran.

C Corresponding author. Email: skosaloo@modares.ac.ir

Australian Systematic Botany 30(1) 105-111 https://doi.org/10.1071/SB16022
Submitted: 20 May 2016  Accepted: 10 February 2017   Published: 31 May 2017

Abstract

The phylogeny of Heterocaryum and Suchtelenia was examined using sequence data from the internal transcribed spacer region of the nuclear rDNA (ITS) and plastid trnL intron and trnL–trnF intergenic spacer (trnL–F) regions. Results indicated that Heterocaryum is non-monophyletic because of the inclusion of Suchtelenia calycina (C.A.Mey.) A.DC. Heterocaryum laevigatum (Kar. & Kir.) A.DC. formed a distinct branch sister to S. calycina and remaining Heterocaryum species. Hence, all species of Heterocaryum except H. laevigatum (type species of the genus) are transferred to a new genus, Pseudoheterocaryum. Taxonomic descriptions are presented for Pseudoheterocaryum and Heterocaryum, as well as a diagnostic key to the three genera included in the present study.

Additional keywords: Boraginaceae, cpDNA trnL–trnF, molecular phylogeny, nrDNA ITS, Suchtelenia.


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