Molecular phylogeny of Utricularia sections Meionula and Nigrescentes (Subg. Bivalvaria; Lentibulariaceae) with a new species for the mound springs of the Great Artesian Basin, Australia

Richard W Jobson; Paulo C Baleeiro

doi:10.7751/telopea20197

Authors

Richard W Jobson National Herbarium of New South Wales
Paulo C Baleeiro Queensland Herbarium https://orcid.org/0000-0002-0484-3166

DOI:

https://doi.org/10.7751/telopea20197

Keywords:

Utricularia, Bladderwort, Mound Springs, New species, Asia, India, Australia, Systematics, Phylogeny

Abstract

Utricularia subgenus Bivalvaria Kurz (Lentibulariaceae) is distributed across the Old and New World tropics. A recent molecular phylogeny sampled across 13 sections of subg. Bivalvaria found sect. Aranella sister to two large clades of 1. Oligocista/Benjaminia-Martinia-Enskide/Minutae-Stomoisia sister to 2. Nigrescentes-Phyllaria-Lloydia-Calpidisca-Australes-Meionula. We present a molecular phylogeny of clade 2 using a matrix of the nuclear ITS and two chloroplast markers that includes 15 of the 36 recognised species sampled across the range of target species. The phylogenetic study sampled broadly within the closely allied sections Nigrescentes and Meionula (Raf.) P.Taylor from across each of their distributions. This study provides morphological and molecular evidence for recognition of a new species in sect. Nigrescentes, Utricularia artesiana R.W.Jobson & Baleeiro, from discharge mound spring habitats of western Queensland. Our description is based on the phylogenetic results and morphology. Morphological differences between closely related species are here discussed, and an identification key is provided. Distributions and habitat preferences of these species are discussed. We also provide molecular phylogenetic evidence for the presence of the Asian U. geoffrayi Pellegrin of sect. Meionula across northern Australia, and support for maintaining U. nivea Vahl as a synonym of U. caerulea L.

Author Biography

Richard W Jobson, National Herbarium of New South Wales

Systematic Botanist

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