Phylogenetic placement of the enigmatic genus Holocheila (Lamiaceae) inferred from plastid DNA sequences

Taxon ◽  
2014 ◽  
Vol 63 (2) ◽  
pp. 355-366 ◽  
Author(s):  
Ya-Ping Chen ◽  
Bo Li ◽  
Richard G. Olmstead ◽  
Philip D. Cantino ◽  
En-De Liu ◽  
...  
Keyword(s):  
Dna Sequences ◽  
Plastid Dna ◽  
Phylogenetic Placement

Discovery of New Genera Challenges the Subtribal Classification of Tok-Tok Beetles (Coleoptera: Tenebrionidae: Sepidiini)

2021 ◽  
Vol 5 (2) ◽  
Author(s):  
Olivia M Gearner ◽  
Marcin J Kamiński ◽  
Kojun Kanda ◽  
Kali Swichtenberg ◽  
Aaron D Smith
Keyword(s):  
Dna Sequences ◽  
Species Group ◽  
Phylogenetic Placement ◽  
Darkling Beetles ◽  
Species Groups ◽  
Taxonomic Groups ◽  
Inference Methods ◽  
A New Species ◽  
Coleoptera Tenebrionidae

Abstract Sepidiini is a speciose tribe of desert-inhabiting darkling beetles, which contains a number of poorly defined taxonomic groups and is in need of revision at all taxonomic levels. In this study, two previously unrecognized lineages were discovered, based on morphological traits, among the extremely speciose genera Psammodes Kirby, 1819 (164 species and subspecies) and Ocnodes Fåhraeus, 1870 (144 species and subspecies), namely the Psammodes spinosus species-group and Ocnodes humeralis species-group. In order to test their phylogenetic placement, a phylogeny of the tribe was reconstructed based on analyses of DNA sequences from six nonoverlapping genetic loci (CAD, wg, COI JP, COI BC, COII, and 28S) using Bayesian and maximum likelihood inference methods. The aforementioned, morphologically defined, species-groups were recovered as distinct and well-supported lineages within Molurina + Phanerotomeina and are interpreted as independent genera, respectively, Tibiocnodes Gearner & Kamiński gen. nov. and Tuberocnodes Gearner & Kamiński gen. nov. A new species, Tuberocnodes synhimboides Gearner & Kamiński sp. nov., is also described. Furthermore, as the recovered phylogenetic placement of Tibiocnodes and Tuberocnodes undermines the monophyly of Molurina and Phanerotomeina, an analysis of the available diagnostic characters for those subtribes is also performed. As a consequence, Phanerotomeina is considered as a synonym of the newly redefined Molurina sens. nov. Finally, spectrograms of vibrations produced by substrate tapping of two Molurina species, Toktokkus vialis (Burchell, 1822) and T. synhimboides, are presented.

scholarly journals Molecular phylogeny ofSolms-laubachia(Brassicaceae) s.l., based on multiple nuclear and plastid DNA sequences, and its biogeographic implications

2009 ◽  
Vol 47 (5) ◽  
pp. 402-415 ◽  
Author(s):  
Ji-Pei YUE ◽  
Hang SUN ◽  
David A. BAUM ◽  
Jian-Hua LI ◽  
Ihsan A. AL-SHEHBAZ ◽  
...  
Keyword(s):  
Molecular Phylogeny ◽  
Dna Sequences ◽  
Plastid Dna

Phylogenetic placement and new data on macro and micro morphology of Nopalxochia phyllanthoides (Cactaceae), an endangered species from Mexico

Phytotaxa ◽  
2015 ◽  
Vol 222 (4) ◽  
pp. 241 ◽  
Author(s):  
César Martínez-González ◽  
Othón Alcántara ◽  
Isolda Luna-Vega ◽  
Ricardo Garcia-Sandoval
Keyword(s):  
Endangered Species ◽  
Dna Sequences ◽  
Previous Treatment ◽  
Phylogenetic Placement ◽  
Reproductive Structures ◽  
Micro Morphology

The phylogenetic placement of Nopalxochia phyllanthoides using DNA sequences of two plastid regions is investigated. New data on the micro- and macro-morphology are also presented. Detailed descriptions of habit, vegetative and reproductive structures, as well as micro-morphology of areoles, epidermic cells of the apical and medium part of the spines, stomata, pollen and seeds, are provided. The results obtained show the N. phyllanthoides is to be recognized as independent taxon, so correcting the previous treatment a taxon belonging to the genus Disocactus. A lectotype and epitype are designated for this species.

Paris variabilis (Melanthiaceae), a new species from southwestern China

Phytotaxa ◽  
2019 ◽  
Vol 401 (3) ◽  
pp. 190
Author(s):  
ZHENYAN YANG ◽  
CHENGJIN YANG ◽  
YUNHENG JI
Keyword(s):  
New Species ◽  
Dna Sequences ◽  
Phylogenetic Analyses ◽  
Southwestern China ◽  
New Taxon ◽  
Phylogenetic Placement ◽  
Greenish Yellow ◽  
The Status ◽  
Its Dna Sequences ◽  
A New Species

Paris variabilis, a new species from the Wumengshan Mountains, southwestern China, is described and illustrated. The new species is placed in Paris section Euthyra. The new taxon was determined to be most morphologically similar to P. vietnamensis but differs in its oblong leaf blades with an acute apex, stamens 2–4 × petal number, greenish yellow filaments and an enlarged, purplish red style base. The phylogenetic placement of this species was assessed based on nuclear ribosomal ITS DNA sequences data. The results of morphological and phylogenetic analyses support the status of the taxon as a new species.

Phylogenetic relationships based on nuclear and plastid DNA sequences reveal recent diversification and discordant patterns of morphological evolution of the Chilean genera of Gilliesieae (Amaryllidaceae: Allioideae)

2020 ◽  
Vol 194 (1) ◽  
pp. 84-99
Author(s):  
Inelia Escobar ◽  
Eduardo Ruiz-Ponce ◽  
Paula J Rudall ◽  
Michael F Fay ◽  
Oscar Toro-Núñez ◽  
...  
Keyword(s):  
Dna Sequences ◽  
Phylogenetic Relationships ◽  
Incomplete Lineage Sorting ◽  
Morphological Evolution ◽  
Strong Support ◽  
Plastid Dna ◽  
Lineage Sorting ◽  
Generic Level ◽  
Molecular Analyses ◽  
Floral Diversity

Abstract Gilliesieae are a South American tribe of Amaryllidaceae characterized by high floral diversity. Given different taxonomic interpretations and proposals for generic and specific relationships, a representative phylogenetic analysis is required to clarify the systematics of this group. The present study provides a framework for understanding phylogenetic relationships and contributing to the development of an appropriate taxonomic treatment of Gilliesieae. Molecular analyses, based on nuclear (ITS) and plastid DNA sequences (trnL-F and rbcL), resolve with strong support the monophyly of the tribe and the differentiation of two major clades. Clade I comprises the genera Gilliesia, Gethyum and Solaria and Clade II includes Miersia and Speea. These well-supported clades are mostly congruent with vegetative and karyotype characters rather than, e.g., floral symmetry. At the generic level, all molecular analyses reveal the paraphyly of Gilliesia and Miersia. Gethyum was found to be paraphyletic, resulting in the confirmation of Ancrumia as a distinct genus. Several instances of incongruent phylogenetic signals were found among data sets. The calibrated tree suggests a recent diversification of the tribe (Pliocene–Pleistocene), a contemporary process of speciation in which instances of hybridization and incomplete lineage sorting could explain patterns of paraphyly and incongruence of floral morphology.

A Phylogenetic Analysis of Loasaceae Subfamily Loasoideae Based on Plastid DNA Sequences

2005 ◽  
Vol 166 (2) ◽  
pp. 289-300 ◽  
Author(s):  
Larry Hufford ◽  
Michelle M. McMahon ◽  
Robin O’Quinn ◽  
Muriel E. Poston
Keyword(s):  
Phylogenetic Analysis ◽  
Dna Sequences ◽  
Plastid Dna

scholarly journals Jumping through the hoops: the challenges of daffodil (Narcissus) classification

2019 ◽  
Vol 190 (4) ◽  
pp. 389-404 ◽  
Author(s):  
Kálmán Könyves ◽  
John David ◽  
Alastair Culham
Keyword(s):  
Dna Sequences ◽  
Phylogenetic Trees ◽  
Plastid Dna ◽  
Microsatellite Data ◽  
Population Sampling ◽  
Molecular Phylogenetic ◽  
History Of ◽  
Nuclear Microsatellite ◽  
Congruent Group ◽  
First Time

Abstract Hoop-petticoat daffodils are a morphologically congruent group comprised of two distinct lineages in molecular phylogenetic trees of Narcissus. It is possible that the morphological similarity is a product of both historic and current low-level gene flow between these lineages. For the first time, we report population sampling from across the entire range of distribution covering the Iberian Peninsula and Morocco. In total, 455 samples were collected from 59 populations. Plastid DNA sequences of matK and ndhF were generated alongside 11 microsatellite loci to permit comparison between plastid and nuclear lineage histories. The plastid DNA phylogenetic tree was highly congruent with previous molecular studies and supported the recognition of these two lineages of hoop-petticoat daffodils as separate sections. Assignment of samples to sections sometimes differed between plastid DNA and (nuclear) microsatellite data. In these cases, the taxa had previously been the focus of dissent in taxonomic placement based on morphology. These discrepancies could be explained by hybridization and introgression among the two lineages during the evolution of hoop-petticoat daffodils, and shows that placement of species in sections is dependent on the source of data used. This study underlines the complex evolutionary history of Narcissus and highlights the discrepancies between floral morphology and phylogeny, which provides a continuing challenge for the systematics of Narcissus.

Novel Neidium Pfitzer species from western Canada based upon morphology and plastid DNA sequences

Phytotaxa ◽  
2019 ◽  
Vol 419 (1) ◽  
pp. 39-62 ◽  
Author(s):  
PAUL B. HAMILTON ◽  
AMANDA M. SAVOIE ◽  
CYNTHIA M. SAYRE ◽  
OLIVER SKIBBE ◽  
JONAS ZIMMERMANN ◽  
...  
Keyword(s):  
Dna Sequences ◽  
External Surface ◽  
Sequence Data ◽  
Lake Victoria ◽  
Plastid Dna ◽  
Botanical Garden ◽  
Western Canada ◽  
Nutrient Loads ◽  
Small Stream ◽  
Stream System

Five taxa in the genus Neidium, N. iridis, N. beatyi sp. nov., N. vandusenense sp. nov., N. collare sp. nov. and N. lavoieanum sp. nov. are documented from a pond and stream system in the VanDusen Botanical Garden, Vancouver, Canada. Neidium beatyi is a large linear species with multiple longitudinal canals and sagittate apices. The areolae are occluded by finger-like silica extensions on the external surface. This taxon is distinguished from Neidium iridis by the number of longitudinal canals (>5), shape of the valve apices, and smaller size. Neidium vandusenense is broadly linear with distinct rostrate apices. Two-three longitudinal canals are present along each margin. Plastid rbcL sequence data associates this taxon with N. amphigomphus. Neidium collare is an elliptic lanceolate taxon with one longitudinal canal. This taxon is genetically related to N. bisculatum sensu lato, but with a different shape form. Neidium lavoieanum has a valve shape form similar to Neidium potapovae, but is larger and genetically similar to N. productum sensu lato. The five Neidium taxa were observed in a small stream next to Lake Victoria (pond) in the VanDusen Botanical Garden Vancouver, Canada. The water was mildly alkaline with a pH of 7.86, a conductance of 163 µS/cm, higher nutrient loads and low metal content.

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