The Phylogenetic Affinities of Two Mysterious Monotypic Mimosoids from Southern South America

  title={The Phylogenetic Affinities of Two Mysterious Monotypic Mimosoids from Southern South America},
  author={Melissa A. Luckow and Ren{\'e}e H Fortunato and Silvana M. Sede and Tatyana Livshultz},
Abstract Two monotypic genera of Mimosoideae from southern South America, Mimozyganthus and Piptadeniopsis, have been particularly difficult to classify and there has been disagreement about their relationships to other legume genera. We undertook a phylogenetic study based on molecular data from the chloroplast and nucleus, and synthesized it with new data from morphology, cytology, and palynology, in order to determine where these genera belong in the mimosoid phylogenetic tree. Mimozyganthus… 

Toward a Phylogeny of Mimosa (Leguminosae: Mimosoidae): A Preliminary Analysis of Southern South American Species Based on Chloroplast DNA Sequence1

A preliminary phylogenetic analysis of chloroplast nucleotide sequences from 34 species of Mimosa and related genera suggests that the representatives from sections Calothamnos and Mimosa share a common ancestor with those from section Habbasia and section Batocaulon ser.

The evolutionary history of Mimosa (Leguminosae): toward a phylogeny of the sensitive plants.

A preliminary phylogenetic framework for Mimosa is established that can be used to infer patterns of morphological evolution and relationships and which provides pointers toward a revised infrageneric classification.

Boliviadendron, a new segregate genus of mimosoid legume (Leguminosae, Caesalpinioideae, mimosoid clade) narrowly endemic to the interior Andean valleys of Bolivia

Phylogenetic analyses of DNA sequence data sampling all species of Leucochloron alongside representatives of genera of the Inga and Albizia clades of the larger ingoid clade of mimosoid legumes confirm the non-monophyly of the genus Leu cochloron, which is segregated as the new genus, Boliviadendron, with a single species.

A review of the classification of Acacia (Leguminosae, Mimosoideae)

  • D. Murphy
  • Biology
    Muelleria: An Australian Journal of Botany
  • 2008
The history of the systematics of Acacia s.s.l is reviewed, providing a comparison of recent phylogenies to previous classifications, and the segregated generic names for Acaciella and Vachellia will be used following the re-typification ofAcacia with an Australian type.

Toward a Census of Mimosa (Leguminosae) in the Atlantic Domain, Southeastern Brazil

This study extends the known geographic distribution of several taxa of Mimosa, and includes new records for the study area, and proposes the synonymization of M. extensa Benth.

Cytology, ploidy and molecular taxonomy of Prosopis juliflora DC and Prosopis pallida HBK

The transferability of microsatellite markers developed from P. chilensis (Molina) Stuntz emend.

Phylogenomic analysis of 997 nuclear genes reveals the need for extensive generic re-delimitation in Caesalpinioideae (Leguminosae)

The monophyly of genera across Caesalpinioideae is tested via phylogenomic analysis of 997 nuclear genes sequenced via targeted enrichment (Hybseq) for 420 species and 147 of the 152 genera currently recognised in the subfamily and it is shown that 22 genera are non-monophyletic or nested in other genera and that non-Monophyly is concentrated in the mimosoid clade.

Mezcala – a new segregate genus of mimosoid legume (Leguminosae, Caesalpinioideae, mimosoid clade) narrowly endemic to the Balsas Depression in Mexico

The Desmanthus balsensis species is transferred to a new segregate genus Mezcala, the morphological features supporting this new genus are discussed, a key to distinguish MeZcala from closely related genera in the Leucaena subclade is presented, and a distribution map of M. balsense is provided.

Phylogeny of the Rosidae: A dense taxon sampling analysis

This study combines sequences from 9300 species, representing 2775 genera, 138 families, and 17 orders into a supermatrix, and shows the value of a botanically informed bioinformatics approach and dense taxonomic sampling for resolving rosid relationships.




This study highlights the inevitability of recognising segregate genera from Acacia s.l., and the necessary abandonment of Bentham’s longstanding tribal classification.

Generic Relationships in the Dichrostachys Group (Leguminosae: Mimosoideae): Evidence from Chloroplast DNA Restriction Sites and Morphology

Data from chloroplast DNA restriction sites and morphology are combined in a phylogenetic analysis of six genera in the Dichrostachys and Leucaena groups. Desmiianthus is demonstrated to be monophy-


A densely sampled informal Dichrostachys and Leucaena group analysis that includes all the constituent genera and 72 of the 91 species using a new DNA sequence data set from the nrDNA 5.8S and flanking internal transcribed spacer regions (ITS1 and ITS2).

Floral Morphology in Caesalpinioid Legumes: Testing the Monophyly of the “Umtiza Clade”

P phylogenetic analyses of data from the chloroplast trnL intron and trnF spacer resulted in a single most parsimonious tree in which Umtiza is grouped with six other small caesalpinioid genera in an association of taxonomically and biogeographically disparate taxa.

Molecular phylogenetics of Acacia subgenera Acacia and Aculeiferum (Fabaceae : Mimosoideae), based on the chloroplast matK coding sequence and flanking trnK intron spacer regions

The genus Acacia is subdivided into the following three subgenera: subg. Acacia, subg. Aculeiferum and the predominantly Australian subg. Phyllodineae. Morphological and molecular studies have

Stigma Morphology in the Leguminosae: The Wet, Papillate (WP) Stigma in Caesalpinioideae

Two types of stigma have now been recorded in Caesalpinioideae, wet papillate and wet, non-papillate, and these morphological characters may help in classification.

Pollination, angiosperm speciation, and the nature of species boundaries

The time is ripe to initiate several lines of further research on pollination to understand whether different suites of pollinators can affect consistent selection in different directions on floral characteristics, and how reproductive isolation arises within and among populations, races, and higher taxa of plants.


It is concluded that pollinator discrimination among species is strong but is an imperfect isolation mechanism, especially if hybrids are present, which could facilitate gene flow between the parental species.

The morphology of the wet, non-papillate (WN) stigma form in the tribe Caesalpinieae (Caesalpinioideae: Leguminosae)

Stigmas in 24 species of 11 genera, classified in three groups, Caesalpinia, Peltophorum and Dimorphandra, of the tribe Caesalpinieae have been examined by light and scanning electron microscopy. All

Data decisiveness, data quality, and incongruence in phylogenetic analysis: an example from the monocotyledons using mitochondrial atp A sequences.

It seems likely that the poorer performance of rbcL than atpA, in terms of data decisiveness, is due to both its higher overall level of homoplasy and the fact that it is performing especially poorly at nonsynonymous sites.