Phylogenetic relationships of the neuropogonoid core group in the genus Usnea(Ascomycota: Parmeliaceae)

2011 ◽  
Vol 43 (6) ◽  
pp. 553-559 ◽  
Author(s):  
H.Thorsten LUMBSCH ◽  
Nora WIRTZ
Keyword(s):  
Phylogenetic Relationships ◽  
Sequence Data ◽  
Strong Support ◽  
New Combination ◽  
Bayesian Analyses ◽  
Core Group ◽  
Dna Sequence Data ◽  
The Core ◽  
Statistical Confidence ◽  
Nuclear Its

AbstractSpecies of Usnea with black pigmentation in the cortex and dark apothecial discs are informally referred to as neuropogonoid lichens. Here we studied the phylogenetic relationships of the core group of neuropogonoid lichens using DNA sequence data of three loci: nuclear ITS and IGS rDNA and RPB1. Maximum likelihood and Bayesian analyses revealed monophyly of 11 neuropogonoid species, with U. ciliata and U. subcapillaris forming a separate lineage. The backbone of the phylogeny of the core group was not resolved with statistical confidence, but relationships of groups of two to three species received strong support (U. acromelana +U. aurantiaco-atra; U. messutiae+U. pallidocarpa; U. sphacelata+U. subantarctica+U. trachycarpa; U. lambii+U. perpusilla+U. ushuaiensis). The new combination U. lambii (Imshaug) Wirtz & Lumbsch comb. nov. is made and U. messutiae Wirtz & Lumbsch sp. nov. is described.

Phylogenetic relationships in subtribe Poinae (Poaceae, Poeae) based on nuclear ITS and plastid trnT–trnL–trnF sequencesThis paper is one of a selection of papers published in the Special Issue on Systematics Research.

Botany ◽  
2008 ◽  
Vol 86 (8) ◽  
pp. 938-967 ◽  
Author(s):  
Lynn J. Gillespie ◽  
Robert J. Soreng ◽  
Roger D. Bull ◽  
Surrey W.L. Jacobs ◽  
Nancy F. Refulio-Rodriguez
Keyword(s):  
Phylogenetic Relationships ◽  
Internal Transcribed Spacer ◽  
Close Relationships ◽  
Sequence Data ◽  
New Combination ◽  
Special Issue ◽  
Consensus Tree ◽  
Strict Consensus Tree ◽  
Nuclear Its ◽  
Selection Of

The worldwide temperate subtribe Poinae comprises the largest grass genus, Poa (500+ species), and multiple additional small genera. We explore generic boundaries and relationships among genera of Poinae using nuclear ribosomal internal transcribed spacer data (ITS) and plastid trnT–trnL–trnF (TLF) sequence data. ITS and TLF analyses are mostly congruent with regards to circumscription of genera, and with respect to relationships among Poinae genera, but tree structure is generally better supported among genera in the ITS strict consensus tree. ITS and TLF both support two main Poinae lineages: (i) Poa and (ii) a clade comprising all other sampled Poinae. Nine small genera were nested within the large Poa clade, including Aphanelytrum , Dissanthelium , and Tovarochloa , supporting inclusion of these as sections within Poa. In the second clade, three subclades support close relationships among Nicoraepoa , Hookerochloa , and Arctagrostis ; Arctophila and Dupontia ; and Apera , Bellardiochloa , and Ventenata . Genera of the related subtribes Alopecurinae, Cinninae, and Miliinae were mixed among or in part external to Poinae in different ways in ITS and TLF analyses, and only subtribe Puccinelliinae was strongly supported and monophyletic. ITS analyses supported placement of Catabrosella , Hyalopoa , and Paracolpodium in Puccinelliinae (no TLF data available). The position of Poa subgenus Arctopoa is incongruent between the two analyses: TLF data support inclusion within Poa and ITS data place it outside of Poa. Similarly, TLF data resolves the genus Aniselytron outside of Poa, whereas ITS data place it within Poa. Based on these results and a consideration of morphology, we recognize Arctopoa and Aniselytron as genera, probably of ancient hybrid origins. Nothogenus  × Duarctopoa is coined for Arctopoa × Dupontia, with a single nothospecies  × Duarctopoa labradorica . A new combination is provided for Poa subg. Sylvestres .

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 Senecio kumaonensis (Asteraceae, Senecioneae) is a Synotis based on evidence from karyology and nuclear ITS/ETS sequence data

Phytotaxa ◽  
2017 ◽  
Vol 292 (1) ◽  
pp. 35 ◽  
Author(s):  
TIAN-JING TONG ◽  
MING TANG ◽  
CHEN REN ◽  
QIN-ER YANG
Keyword(s):  
Multidisciplinary Approach ◽  
Sequence Data ◽  
Phylogenetic Analyses ◽  
Strong Support ◽  
New Combination ◽  
Tissue Cell ◽  
Close Relationship ◽  
Nuclear Its ◽  
Micromorphological Characters ◽  
Relationship Of

We apply a multidisciplinary approach to settle the dispute over the generic affiliation of the Himalayan species Senecio kumaonensis (based on Cacalia penninervis). Some floral micromorphological characters of this species, including shape of anther bases, configuration of anther collars, and anther endothecial tissue cell wall thickenings, are confirmed to perfectly match those of Senecio and this has obviously resulted in the placement of the species within that genus. Chromosome counts indicate S. kumaonensis has 2n = 40, a number common to Senecio and Synotis but not occurring in Parasenecio (the correct generic name for the Asian species previously referred to Cacalia), which has 2n = 52, 58, and 60. The presence of six subterminal-centromeric (st) chromosomes in the karyotype of S. kumaonensis, however, lends strong support to the close relationship of this species to Synotis. Our phylogenetic analyses based on ITS/ ETS sequences also place S. kumaonensis in Synotis. In this species the anther tail feature, once deemed to be diagnostic for Synotis (anther bases in Synotis with sterile, tailed auricles vs. those in Senecio without such auricles, obtuse to sagittate), has an exception as evidenced from phylogeny. We therefore transfer S. kumaonensis to Synotis and, as the epithet “penninervis” has hitherto never been used in the genus, we propose the new combination Syn. penninervis for this species.

Phylogenetic relationships in Loganieae (Loganiaceae) inferred from nuclear ribosomal and chloroplast DNA sequence data

2012 ◽  
Vol 25 (5) ◽  
pp. 331 ◽  
Author(s):  
Kerry L. Gibbons ◽  
Murray J. Henwood ◽  
Barry J. Conn
Keyword(s):  
Dna Sequence ◽  
Molecular Systematics ◽  
Phylogenetic Relationships ◽  
Maximum Parsimony ◽  
Sequence Data ◽  
Bayesian Analyses ◽  
Dna Sequence Data ◽  
The Family ◽  
The Relationship ◽  
Western Australian

Molecular systematics has clarified the limits of Loganiaceae (Gentianales), the tribal circumscriptions and the phylogenetic relationships within the family. Loganieae includes seven genera; however, generic boundaries remain untested and intergeneric relationships are largely unknown. The chloroplast intron petD and the nuclear ribosomal ETS were sequenced for 37 ingroup accessions, including all genera of Loganieae, to infer generic and infrageneric boundaries and intergeneric relationships within the tribe. Maximum parsimony and Bayesian analyses resolved several strongly supported clades. Mitreola s. str. was placed sister to the rest of Loganieae. The south-western Australian endemic, Mitreola minima B.J.Conn, was placed sister to Mitrasacme, Schizacme and Phyllangium, rendering Mitreola polyphyletic. Mitrasacme, Logania section Logania and L. section Stomandra were each strongly supported as monophyletic, but there was no support for the monophyly of Logania. Geniostoma was paraphyletic with respect to a monophyletic Labordia. It is here recommended that Mitreola minima be afforded generic status and that the three species of Labordia used in the present study be reduced to synonymy of Geniostoma. Additional sampling is needed to clarify the relationship between Logania section Logania and L. section Stomandra and to increase support for intergeneric relationships in Loganieae.

Phylogenetic reassessment of Specklinia and its allied genera in the Pleurothallidinae (Orchidaceae)

Phytotaxa ◽  
2016 ◽  
Vol 272 (1) ◽  
pp. 1 ◽  
Author(s):  
ADAM P. KARREMANS ◽  
FEDERICO J. ALBERTAZZI ◽  
FREEK T. BAKKER ◽  
DIEGO BOGARÍN ◽  
MARCEL C.M. EURLINGS ◽  
...  
Keyword(s):  
Small Group ◽  
Phylogenetic Relationships ◽  
Morphological Traits ◽  
Sequence Data ◽  
New Combinations ◽  
Bayesian Analyses ◽  
Generic Delimitation ◽  
Phenotypic Differences ◽  
Diverse Species ◽  
Matk Sequence

The phylogenetic relationships within Specklinia (Pleurothallidinae; Orchidaceae) and related genera are re-evaluated using Bayesian analyses of nrITS and chloroplast matK sequence data of a wide sampling of species. Specklinia is found paraphyletic in the DNA based trees, with species alternatively assigned to Muscarella proven distinct, monophyletic and easily recognizable. Specklinia as such includes about 100 morphologically highly diverse species. Their phenotypic differences have prompted the creation of up to eleven generic names within this relatively small group. Here we show not only that these morphologically divergent species are closely related, but also that they can still be recognized by certain conserved morphological traits. The genera Acostaea, Areldia, Empusella, Cucumeria, Gerardoa, Pseudoctomeria, Sarcinula, Sylphia, Tribulago and Tridelta are found embedded within Specklinia, and therefore reduced under the synonymy of the latter. Specklinia is confirmed as sister to a clade that includes Platystele, Scaphosepalum and Teagueia. Five well-supported subgenera are proposed for Specklinia and are characterized both geographically and morphologically. The species belonging to each subgenus are listed. Incaea is synonymized with Dryadella, while Rubellia is reduced under Platystele. New combinations for several species are proposed. The criteria for the generic delimitation of Specklinia and other genera in the Pleurothallidinae are discussed.

Sign in / Sign up

Export Citation Format

Share Document