Phylogenetic placement and a new circumscription of Poteranthera (Microlicieae; Melastomataceae)

Phytotaxa ◽  
2016 ◽  
Vol 263 (3) ◽  
pp. 219 ◽  
Author(s):  
MARIA JOSÉ REIS DA ROCHA ◽  
PAULO JOSÉ FERNANDES GUIMARÃES ◽  
FABIÁN A. MICHELANGELI ◽  
ROSANA ROMERO
Keyword(s):  
South America ◽  
Dna Sequence ◽  
Sequence Data ◽  
Phylogenetic Analyses ◽  
New Combination ◽  
Phylogenetic Position ◽  
Glandular Hairs ◽  
Dna Sequence Data ◽  
Phylogenetic Placement ◽  
Generic Description

Poteranthera (Melastomataceae) is a genus of small, annual herbs with narrow leaves, that inhabit humid savannas in South America and are visible only when in bloom. Due to their size and paucity of collections, the phylogenetic position of Poteranthera has been uncertain to this point. Poteranthera has been at times associated, confused, or placed in Acisanthera and/or Siphanthera. Phylogenetic analyses based on DNA sequence data place Poteranthera unequivocally within the Microlicieae and not closely related to Acisanthera or Siphantera. These results are consistent with seed and anther morphology. Putative morphological synapomorphies for this genus are the glandular hairs restricted to the leaf margins and the apically constricted hypanthium. Based on morphology, Acisanthera leptalea seems better placed in Poteranthera and the new combination Poteranthera leptalea is made. An expanded generic description is also provided.

Aeschynomene chicocesariana, a Striking New Unifoliolate Legume Species from the Brazilian Chapada Diamantina and its Phylogenetic Placement in the Dalbergioid Clade

2019 ◽  
Vol 44 (4) ◽  
pp. 810-817
Author(s):  
Domingos Benício Oliveira Silva Cardoso ◽  
Gustavo Ramos ◽  
Wallace Messias Barbosa São-Mateus ◽  
Luciano Paganucci de Queiroz
Keyword(s):  
Dna Sequence ◽  
Sequence Data ◽  
Phylogenetic Analyses ◽  
Current Work ◽  
Legume Species ◽  
Distribution Map ◽  
Chapada Diamantina ◽  
Dna Sequence Data ◽  
Phylogenetic Placement

Abstract—Unifoliolate leaves are relatively rare in the species-rich dalbergioid clade of papilionoid legumes (Leguminosae, Papilionoideae). For the pantropical, diverse genus Aeschynomene (ca. 180 species), the only known record of unifoliolate species described so far is the savanna-inhabiting A. simplicifolia from Chapada dos Veadeiros in Goiás, Brazil. The current work provides a description, illustrations, and a distribution map of another unifoliolate species, Aeschynomene chicocesariana, which was newly discovered in the rupestrian grasslands of Chapada Diamantina in Bahia, Brazil. Bayesian phylogenetic analyses of DNA sequence data (nuclear ribosomal ITS/5.8S and the plastid genes matK and trnL intron) have unequivocally placed A. chicocesariana with the rest of Aeschynomene species that are traditionally placed within Aeschynomene sect. Ochopodium. This result agrees with the shared morphology of A. chicocesariana and members of that section.

Morphological and phylogenetic relationships of the threatened geophyte Wurmbea novae-zelandiae (Colchicaceae) from New Zealand, with notes on typification

Phytotaxa ◽  
2017 ◽  
Vol 307 (2) ◽  
pp. 123
Author(s):  
PETER B. HEENAN ◽  
TERRY D. MACFARLANE ◽  
ANDREA L. CASE ◽  
SEAN W. GRAHAM ◽  
ANNIKA VINNERSTEN ◽  
...  
Keyword(s):  
New Zealand ◽  
Dna Sequence ◽  
Phylogenetic Relationships ◽  
Floral Morphology ◽  
Sequence Data ◽  
Morphological Characters ◽  
New Combination ◽  
Dna Sequence Data ◽  
Phylogenetic Studies ◽  
Generic Description

The new combination Wurmbea novae-zelandiae was recently made based on published phylogenetic studies, but little information was provided on its relationships based on morphology. This species was originally described as Anguillaria novae-zelandiae, for which a lectotype is designated. Morphological characters of W. novae-zelandiae are re-evaluated and shown to be characteristic of Wurmbea, thereby supporting the revised generic placement. However, W. novae-zelandiae differs from all other Wurmbea species in its diminutive stature, fewer tepals and stamens, and variable floral morphology, with 1–3 carpels, often leaf-like tepals, and aberrant tepal shape and number. DNA sequence data places W. novae-zelandiae as the sister species of W. uniflora, a species not included in earlier phylogenetic studies. These two species share mostly solitary flowers with white tepals, nectaries two per tepal and similar in form and position, small yellow anthers, and styles that are relatively short and recurve as flowering proceeds, with the inner style surface stigmatic for up to half of its length. A revised generic description of Wurmbea is provided to take account of the recently widened concept.

scholarly journals Multigene evidence reveals the systematic position of Pleurocladopsis simulans (C. Massal.) R. M. Schust. within Schistochila Dumort., Schistochilaceae

2013 ◽  
Vol 58 (2) ◽  
pp. 467-474 ◽  
Author(s):  
Xiaolan He ◽  
Yu Sun
Keyword(s):  
Phylogenetic Analysis ◽  
Dna Sequence ◽  
Sequence Data ◽  
Taxonomic Status ◽  
Systematic Position ◽  
New Combination ◽  
Phylogenetic Position ◽  
Dna Sequence Data ◽  
Starting Point ◽  
The Family

Abstract The monotypic Pleurocladopsis, endemic to Chile, was established by Schuster in 1964 based on an earlier poorly known species Cephalozia (?) simulans C. Massal. The phylogenetic position of Pleurocladopsis simulans had been considered uncertain until it was placed in the family Schistochilaceae on account of the gynoecial and sporophytic characters. It has been assumed that Pleurocladopsis represents the starting point of evolution in Schistochilaceae. In the present study, the phylogenetic position and taxonomic status of Pleurocladopsis simulans are inferred from phylogenetic analysis of three chloroplast DNA sequence data. The result suggests that the genus was established solely based on the autapomorphic characters, thus obscuring its actual phylogenetic relationship with Schistochila and that these characters are later derived rather than ancestral. The result also confirms that the gynoecial and sporophytic characters are important in taxonomy, but they may be not sufficient at the infrafamilial level and at other lower taxonomic levels. In accordance with the results of the present study, Pleurocladopsis is synonymised with Schistochila, and the new combination Schistochila simulans (C. Massal.) Xiao L. He & Yu Sun is made.

scholarly journals Biological and Phylogenetic Analyses Suggest that Two Cryphonectria spp. Cause Cankers of Eucalyptus in Africa

Plant Disease ◽  
2003 ◽  
Vol 87 (11) ◽  
pp. 1329-1332 ◽  
Author(s):  
J. Roux ◽  
H. Myburg ◽  
B. D. Wingfield ◽  
M. J. Wingfield
Keyword(s):  
South Africa ◽  
South America ◽  
South African ◽  
Sequence Data ◽  
Phylogenetic Analyses ◽  
Eucalyptus Grandis ◽  
Its Region ◽  
South African Isolate ◽  
Dna Sequence Data ◽  
The Republic

Cryphonectria cubensis is an economically important pathogen of commercial Eucalyptus spp. Differences have been reported for disease symptoms associated with Cryphonectria canker in South Africa and other parts of the world, and recent DNA-based comparisons have confirmed that the fungus in South Africa is different from that in South America and Australasia. During a disease survey in the Republic of Congo, Cryphonectria canker was identified as an important disease on Eucalyptus grandis and E. urophylla. In this study, we compared Congolese and South African isolates of C. cubensis using DNA sequence data and pathogenicity under greenhouse conditions. The β-tubulin and internal transcribed spacer (ITS) region sequences show that C. cubensis in Congo is different from the fungus in South Africa and that Congolese isolates group most closely with South American isolates. Furthermore, pathogenicity tests showed that a South African isolate was more aggressive than two Congolese isolates. We conclude that two distinct Cryphonectria spp. occur in Africa and hypothesize that the fungus in the Congo probably was introduced into Africa from South America. Both fungi are important pathogens causing disease and death of economically important plantation trees. However, they apparently have different origins and must be treated separately in terms of disease management and quarantine considerations.

Morphological and molecular evidence places Maronina into synonymy with Protoparmelia (Ascomycota: Lecanorales)

2011 ◽  
Vol 43 (6) ◽  
pp. 561-567 ◽  
Author(s):  
K. PAPONG ◽  
G. KANTVILAS ◽  
H. T. LUMBSCH
Keyword(s):  
Dna Sequence ◽  
Sequence Data ◽  
Distinct Species ◽  
Genetic Distances ◽  
Molecular Evidence ◽  
New Combinations ◽  
Secondary Chemistry ◽  
Phenotypic Characters ◽  
Dna Sequence Data ◽  
Phylogenetic Placement

AbstractThe phylogenetic placement of the genus Maronina was studied, based chiefly on phenotypic characters such as thallus colour and anatomy, secondary chemistry, the anatomy of the excipulum and the ascus-type. DNA sequence data of mitochondrial and nuclear ribosomal loci from some of the species support the hypothesis that Maronina is nested within Protoparmelia. Hence, Maronina is reduced to synonymy with Protoparmelia. Comparison of genetic distances suggests that the two varieties within M. orientalis should be regarded as distinct species. Consequently, the new combinations Protoparmelia australiensis (Hafellner & R. W. Rogers) Kantvilas et al., P. corallifera (Kantvilas & Papong) Kantvilas et al., P. hesperia (Kantvilas & Elix) Kantvilas et al., P. multifera (Nyl.) Kantvilas et al., and P. orientalis (Kantvilas & Papong) Kantvilas et al. are proposed.

Molecular phylogeny and systematics of the centipede genus Ethmostigmus Pocock (Chilopoda : Scolopendromorpha) from peninsular India

2018 ◽  
Vol 32 (6) ◽  
pp. 1316 ◽  
Author(s):  
Jahnavi Joshi ◽  
Gregory D. Edgecombe
Keyword(s):  
Dna Sequence ◽  
Molecular Phylogenetics ◽  
Sequence Data ◽  
Indian Plate ◽  
Eastern Ghats ◽  
Integrative Approach ◽  
Phylogenetic Position ◽  
Ecological Data ◽  
Peninsular India ◽  
Dna Sequence Data

Integrative taxonomy assesses the congruence between different lines of evidence for delimiting species, such as morphological, molecular or ecological data. Herein molecular phylogenetics is used to test monophyly and determine the phylogenetic position of the Old World tropical centipede genus Ethmostigmus Pocock, 1898, and to define species boundaries for Ethmostigmus in peninsular India. A phylogeny of the family Scolopendridae based on DNA sequence data for three markers from 427 specimens sampling in all major lineages (144 individuals generated in this study) recovers Ethmostigmus as a monophyletic group, but relationships among the genera in its subfamily Otostigminae are poorly supported. Two species delimitation methods for DNA sequence data and phylogeny are integrated with morphology and geographic data to propose a well-supported species hypothesis for Ethmostigmus on the peninsular Indian plate. Five species of Ethmostigmus are recognised in peninsular India, of which E. coonooranus Chamberlin, 1920 and three new species, namely, E. agasthyamalaiensis, sp. nov., E. sahyadrensis, sp. nov. and E. praveeni, sp. nov., occur in the Western Ghats, a biodiversity hotspot. The lesser-known Eastern Ghats harbour one species, E. tristis (Meinert, 1886), which has been nearly unreported for 130 years. This study highlights the value of an integrative approach to systematics, especially in underexplored, high biodiversity regions and where morphological variation is limited among closely related species.

Molecular phylogenetics of the Onobrychis genus (Fabaceae: Papilionoideae) using ITS and trnL–trnF DNA sequence data

2014 ◽  
Vol 62 (3) ◽  
pp. 235 ◽  
Author(s):  
S. Safaei Chaei Kar ◽  
F. Ghanavati ◽  
M. R. Naghavi ◽  
H. Amirabadi-zade ◽  
R. Rabiee
Keyword(s):  
Dna Sequence ◽  
Molecular Phylogenetics ◽  
Sequence Data ◽  
Phylogenetic Analyses ◽  
Dna Sequence Data ◽  
Group I ◽  
Molecular Phylogenetic ◽  
Nuclear Its ◽  
Cultivated Species ◽  
Relationship Of

Onobrychis, comprising more than 130 species, is a genus of the family Fabaceae. At this time, the interspecies relationship of this biologically important genus is still a subject of great discussion and debate. To help resolve this disagreement, we used molecular phylogeny to analyse internal transcribed spacer (ITS) and trnL–trnF sequences of 76 species of Onobrychis. Bayesian interference, maximum parsimony and maximum likelihood analyses of nuclear ITS and plastid trnL–trnF DNA sequence data generated trees with strong posterior probability for two groups: Onobrychis subgen. Sisyrosema (including: Heliobrychis, Hymenobrychis, Afghanicae and Anthyllium sections) along with Laxiflorae section in Group I and Onobrychis subgen. Onobrychis (except Laxiflorae section) in the other (Group II). The Laxiflorae section roots back to the ancestral node for Sisyrosema subgen. O. viciifolia (cultivated species), which is closely associated with O. cyri var. cyri, suggesting that the latter may be a wild progenitor of O. viciifolia. The present study supported the paraphyly of subgenera Onobrychis and Sisyrosema. The study proposed the paraphyletic nature of the sections Onobrychis, Dendrobrychis, Heliobrychis and Hymenobrychis. Together with our molecular phylogenetic analyses we present a review of Onobrychis morphology and discuss and compare our results with those of earlier morphological and molecular phylogenetic analyses.

Molecular data allow to elucidate the taxonomic placement of some Umbelliferae from Middle Asia and Afghanistan (Pinacantha, Ladyginia, Peucedanum mogoltavicum)

Phytotaxa ◽  
2018 ◽  
Vol 350 (1) ◽  
pp. 42 ◽  
Author(s):  
GALINA V. DEGTJAREVA ◽  
MICHAEL G. PIMENOV ◽  
TAHIR H. SAMIGULLIN
Keyword(s):  
Phylogenetic Tree ◽  
Dna Sequence ◽  
Sequence Data ◽  
Molecular Data ◽  
Systematic Position ◽  
New Combination ◽  
Dna Sequence Data ◽  
Middle Asia ◽  
Molecular Phylogenetic Tree ◽  
Molecular Phylogenetic

The systematic position of three Apiaceae-Apioideae taxa, Pinacantha porandica, Ladyginia bucharica and Peucedanum mogoltavicum, from Middle Asia and Afghanistan, is clarified based on nrITS DNA sequence data. In the molecular phylogenetic tree, the monotypic Pinacantha is placed in unresolved position within the Ferulinae. Although there is no morphological information on essential characters, we propose a new position of Pinacantha porandica within the genus Ferula. As a result a new combination Ferula porandica is proposed, with a new section Pinacantha to accommodate it. The attribution of Peucedanum mogoltavicum to Ferula has been confirmed, its correct name being Ferula lithophila. The genus Ladyginia should not be included in Ferula, its closest relatives being Mozaffariania and Glaucosciadium from the Glaucosciadium Clade.

Sign in / Sign up

Export Citation Format

Share Document