scholarly journals Apparent similarity, underlying homoplasy: Morphology and molecular phylogeny of the North American clade ofManihot

2015 ◽  
Vol 102 (4) ◽  
pp. 520-532 ◽  
Author(s):  
María-Angélica Cervantes-Alcayde ◽  
Mark E. Olson ◽  
Kenneth M. Olsen ◽  
Luis E. Eguiarte
Keyword(s):  
Molecular Phylogeny ◽  
North American ◽  
The North ◽  
Apparent Similarity ◽  
American Clade

Molecular phylogeny of the North American eurybioid asters (Asteraceae, Astereae) based on the nuclear ribosomal internal and external transcribed spacersThis paper is one of a selection of papers published in the Special Issue on Systematics Research.

Botany ◽  
2008 ◽  
Vol 86 (8) ◽  
pp. 901-915 ◽  
Author(s):  
Sugirthini Selliah ◽  
Luc Brouillet
Keyword(s):  
Molecular Phylogeny ◽  
Coastal Plain ◽  
North American ◽  
Phylogenetic Relationships ◽  
Special Issue ◽  
Bayesian Analyses ◽  
The North ◽  
Perennial Herbs ◽  
American Clade ◽  
Selection Of

The eurybioid asters Oreostemma , Herrickia , Eurybia , and Triniteurybia form a complex that is part of the North American clade of tribe Astereae. They comprise 31 species of perennial herbs that are widely distributed on the continent. Previous analyses had shown poor resolution among the four genera and among the species, particularly within Eurybia (23 spp.), which includes diploids and polyploids. We investigated phylogenetic relationships within the group using the nuclear ribosomal ITS and ETS regions, in separate and combined parsimony and Bayesian analyses. We detected incongruence between the ITS and ETS regions when polyploids were included, and so only diploids were considered in the combined analyses. Eurybia pygmaea (Lindl.) G.L. Nesom is confirmed as a member of Symphyotrichum ; Eurybia is monophyletic once this species is re-classified. The eurybioids form a paraphyletic grade with Oreostemma, sister to the remaining taxa, followed in succession by Herrickia , Eurybia , and Triniteurybia , and with the latter genus sister to subtribe Machaerantherinae. Thus the xeric Machaerantherinae (x = 6, 5, 4) is nested within the grade of mesic eurybioids (x = 9). Although largely grouping together, the polyploid taxa of Eurybia apparently do not constitute a clade and their relationships to the diploid taxa and to each other could not be assessed further. Among the diploids, two clades emerge: one including the western Eurybia integrifolia (Nutt.) G.L. Nesom and Eurybia sibirica (L.) G.L. Nesom, and the southeastern Eurybia eryngiifolia (Torr. & A. Gray) G.L. Nesom; and a second including the western Eurybia radulina (A. Gray) G.L. Nesom, the eastern cordate-leaved (sect. Eurybia) and the narrow-leaved, mostly coastal plain species of Eurybia. Our analyses, therefore, do not support the current classifications of Eurybia.

Phylogeny and taxonomy of the North American clade of theCeratocystis fimbriatacomplex

Mycologia ◽  
2005 ◽  
Vol 97 (5) ◽  
pp. 1067-1092 ◽  
Author(s):  
Jason A. Johnson ◽  
Thomas C. Harrington ◽  
C.J.B. Engelbrecht
Keyword(s):  
North American ◽  
The North ◽  
American Clade

scholarly journals Taxonomic Revision and Multi-locus Phylogeny of the North American Clade Of Ceratocystis

2019 ◽  
Vol 3 (1) ◽  
pp. 135-156 ◽  
Author(s):  
L.A Holland ◽  
D.P. Lawrence ◽  
M.T. Nouri ◽  
R. Travadon ◽  
T.C. Harrington ◽  
...  
Keyword(s):  
North American ◽  
Taxonomic Revision ◽  
The North ◽  
American Clade

Phylogeny and taxonomy of the North American clade of the Ceratocystis fimbriata complex

Mycologia ◽  
2005 ◽  
Vol 97 (5) ◽  
pp. 1067-1092 ◽  
Author(s):  
J. A. Johnson ◽  
T. C. Harrington ◽  
C.J.B. Engelbrecht
Keyword(s):  
North American ◽  
Ceratocystis Fimbriata ◽  
The North ◽  
American Clade

Molecular Phylogeny, Evolution of Shell Shape, and DNA Barcoding in Polygyridae (Gastropoda: Pulmonata), an Endemic North American Clade of Land Snails

2014 ◽  
Vol 32 (1) ◽  
pp. 1-31 ◽  
Author(s):  
Kathryn E. Perez ◽  
Nicholas Defreitas ◽  
John Slapcinsky ◽  
Russell L. Minton ◽  
Frank E. Anderson ◽  
...  
Keyword(s):  
Molecular Phylogeny ◽  
Dna Barcoding ◽  
North American ◽  
Land Snails ◽  
Shell Shape ◽  
American Clade

Towards a monophyletic Omphalodes—or an expansion of North American Mimophytum

Phytotaxa ◽  
2016 ◽  
Vol 288 (2) ◽  
pp. 131 ◽  
Author(s):  
NORBERT HOLSTEIN ◽  
JULIANA CHACÓN ◽  
ANA OTERO ◽  
PEDRO JIMÉNEZ-MEJÍAS ◽  
MAXIMILIAN WEIGEND
Keyword(s):  
North American ◽  
Type Species ◽  
Growth Habit ◽  
The Other ◽  
Character State ◽  
Fruit Morphology ◽  
The North ◽  
Molecular Studies ◽  
American Clade ◽  
Important Character

Molecular studies have recently led to major changes to the systematics of Boraginaceae and changed our perception of fruit morphology, previously used as the most important character in Boraginaceae classification. Navel-shaped nutlets as the key character for Omphalodes turned out to be highly homoplasious, thus the genus was revealed to be polyphyletic. After the recent reclassifications, the genus Omphalodes is still left paraphyletic, since the remaining taxa correspond to two different lineages: a clade of essentially Mediterranean perennials including the type species (O. verna) and a clade with the annual to subperennial North American taxa including the genus Mimophytum. We here advocate transferring all taxa of the North American clade into the genus Mimophytum, subdividing the genus Omphalodes into morphologically coherent and monophyletic entities. Mimophytum was initially removed from Omphalodes based on its glochidiate nutlets, but this character state does not define a monophyletic entity. In overall morphology, the redefined genus Mimophytum is highly homogeneous and easily differentiated from the other clades: it has a lax growth habit, and leaves are long-petiolate, abruptly contracted at the base into a more or less cordate base, and with a fine pubescence of erect trichomes. After the proposed rearrangements, only O. erecta remains as a problematic species whose systematic placement is still to be found out.

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