Morphological Variation in North American Tilia and Its Value in Species Delineation

2020 ◽  
Vol 181 (2) ◽  
pp. 175-195 ◽  
Author(s):  
Diane M. McCarthy ◽  
Roberta J. Mason-Gamer
Keyword(s):  
Morphological Variation ◽  
North American ◽  
Species Delineation

Taxonomic Recognition of Ammophila champlainensis and Morphological Variation in Northeastern North American Ammophila (Poaceae)

Rhodora ◽  
2008 ◽  
Vol 110 (942) ◽  
pp. 129-156 ◽  
Author(s):  
Mireille B. Delisle-Oldham ◽  
Michael J. Oldham ◽  
Paul M. Catling
Keyword(s):  
Morphological Variation ◽  
North American

The systematics of Ranunculus gmelinii and R. hyperboreus in North America

1974 ◽  
Vol 52 (7) ◽  
pp. 1713-1722 ◽  
Author(s):  
Peter J. Scott
Keyword(s):  
Phenotypic Plasticity ◽  
North America ◽  
Morphological Variation ◽  
North American ◽  
Growth Conditions ◽  
Controlled Growth ◽  
The North ◽  
Representative Material

A consideration of the taxonomy of Ranunculus gmelinii DC. and R. hyperboreus Rottb. is presented. The role of phenotypic plasticity is indicated as a factor contributing to the range of morphological variation in these species and to the confusion found in their taxonomy. The present work, by a reexamination of representative material collected throughout the North American range of the species, and the use of controlled growth conditions, has suggested new limits for the species. This has resulted in modifications of the descriptions of the species and (or) the reduction of taxa to synonymy.Ranunculus hyperboreus Rottb. var. turquetilianus Polunin has been made a synonym of R. gmelinii DC.; R. natans C.A. Mey. var. intertextus (Greene) L. Benson has been made a synonym of R. hyperboreus Rottb.

scholarly journals Taxonomic Revision of the Genus Lactifluus (Russulales, Basidiomycota) of South Korea

2021 ◽  
Author(s):  
Hyun Lee ◽  
Komsit Wissitrassameewong ◽  
Myung Soo Park ◽  
Jonathan J. Fong ◽  
Annemieke Verbeken ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Morphological Variation ◽  
North American ◽  
Species Delimitation ◽  
Taxonomic Revision ◽  
Molecular Data ◽  
Similar Species ◽  
Cryptic Diversity ◽  
Intraspecific Morphological Variation

Abstract Lactifluus (Pers.) Roussel is an ectomycorrhizal genus that was recently recognized to be distinct from the genus Lactarius. To date, 216 Lactifluus species have been reported worldwide. Misidentification of Lactifluus species is common because of intraspecific morphological variation, cryptic diversity, and the limited number of taxonomic keys available. Molecular data are indispensable for species delimitation; a multilocus phylogenetic analysis showed that most Asian Lactifluus species are not conspecific with morphologically similar species present on other continents. In particular, Korea has misused European and North American Lactifluus names. In this study, we evaluated the taxonomy of Lactifluus in Korea using both morphological and multilocus molecular (ITS, nrLSU, rpb1, and rpb2) data. We examined 199 Lactifluus specimens collected between 1980 and 2016, and a total of 24 species across the four Lactifluus subgenera were identified. All Korean species are distinct and clearly separated from European and North American species. Five taxa corresponded to previously described species from Asia and the remaining 19 taxa are confirmed as new species. Herein, we provide keys to the Korean Lactifluus species within their subgenera, molecular phylogenies, a summary of diversity, and detailed description of the new species.

scholarly journals Revisiting the North American freshwater mussel genus Quadrula sensu lato (Bivalvia Unionidae): Phylogeny, taxonomy and species delineation

2019 ◽  
Vol 48 (3) ◽  
pp. 313-336 ◽  
Author(s):  
Manuel Lopes‐Lima ◽  
Lyubov Burlakova ◽  
Alexander Karatayev ◽  
André Gomes‐dos‐Santos ◽  
Alexandra Zieritz ◽  
...  
Keyword(s):  
North American ◽  
Freshwater Mussel ◽  
Species Delineation ◽  
The North ◽  
North American Freshwater

scholarly journals Ecological determinants of clinal morphological variation in the cranium of the North American gray wolf

2013 ◽  
Vol 94 (6) ◽  
pp. 1223-1236 ◽  
Author(s):  
F. Robin O'Keefe ◽  
Julie Meachen ◽  
Elizabeth V. Fet ◽  
Alexandria Brannick
Keyword(s):  
Morphological Variation ◽  
North American ◽  
Gray Wolf ◽  
The North

scholarly journals An update of G.K. Merrill's 1909 "Lichen notes no. 14"

Mycotaxon ◽  
2020 ◽  
Vol 135 (2) ◽  
pp. 333-337
Author(s):  
Steven B. Selva ◽  
R. Troy McMullin
Keyword(s):  
Morphological Variation ◽  
North American ◽  
The North

G.K. Merrill proposed three new Calicium taxa that have largely been absent from North American lichen literature since their publication in The Bryologist in 1909. Calicium obscurum [≡ Chaenotheca obscura], which colonizes the basidiocarps of Trichaptum abietinum, predates the use of Chaenotheca balsamconensis. Calicium minutissimum was reintroduced as a member of the North American calicioid biota in 1999. Calicium curtisii var. splendidulum [as "splendidula"] is within the range of morphological variation of Phaeocalicium curtisii and does not warrant varietal status.

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