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 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.

scholarly journals Wing morphology in migratory North American monarchs: characterizing sources of variation and understanding changes through time

2018 ◽  
Vol 5 (1) ◽  
pp. 61-73 ◽  
Author(s):  
Micah G. Freedman ◽  
Hugh Dingle
Keyword(s):  
North America ◽  
Host Plant ◽  
Morphological Variation ◽  
North American ◽  
Monarch Butterfly ◽  
North American Population ◽  
Wing Size ◽  
Wing Morphology ◽  
Larval Host ◽  
Adult Wing

Abstract Monarch butterfly wing morphology varies substantially throughout their global range, both between resident and migratory populations and also within the migratory North American population. Here, we use a dataset comprising more than 1800 North American individuals collected between 1878-2017 to characterize the factors shaping continent-wide patterns of wing morphological variation. North American overwintering butterflies have forewings that are approximately 4.4% larger than those collected in summer breeding areas. Monarchs overwintering in Mexico have forewings that are approximately 1.8% larger than monarchs overwintering in California, conducive to the idea that migration distance is positively correlated with wing area. We find evidence for a latitudinal cline within North America, such that butterflies collected at higher latitudes have significantly larger and more elongated forewings. We also find a significant increase of approximately 4.9% in forewing area between 1878-2017, but no difference through time in wing elongation. This result is corroborated by a reanalysis of a recently published dataset of more than 600 butterflies from Mexican overwintering sites. We discuss possible reasons for this increase in wing size through time, including northward shifts in the monarch’s breeding range and changes in relative abundance of milkweed hosts, and present experimental data addressing the influence of larval host plant on adult wing morphology. Our analysis suggests that (1) migration is indeed an important selective force for monarch wing morphology; (2) wing size has increased through time in North America; (3) factors such as host plant identity must be considered to fully understand monarch wing morphological variation.

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