PUCCINIA KARELICA AND SPECIES DELIMITATION IN THE UREDINALES

1965 ◽  
Vol 43 (2) ◽  
pp. 231-238 ◽  
Author(s):  
D. B. O. Savile
Keyword(s):  
United States ◽  
British Columbia ◽  
Related Species ◽  
Species Delimitation ◽  
Species Concepts ◽  
Distinct Population ◽  
Eastern Canada ◽  
Closely Related Species ◽  
Typical Form ◽  
Coastal British Columbia

The problem of species concepts and delimitation in the heteroecious rusts is discussed. It is illustrated by Puccinia karelica, which is known in typical form from Europe, southern Alaska, coastal British Columbia, and apparently Kamchatka and Saghalien. A distinct population in eastern Canada and adjacent United States is named ssp. laurentina ssp. nov. P. karelica is compared with closely related species and its probable mode of evolution is discussed.

scholarly journals Cortinarius alpinus as an example for morphological and phylogenetic species concepts in ectomycorrhizal fungi

Sommerfeltia ◽  
2008 ◽  
Vol 31 (1) ◽  
pp. 161-177 ◽  
Author(s):  
U. Peintner
Keyword(s):  
Ectomycorrhizal Fungi ◽  
Related Species ◽  
Dry Weight ◽  
Species Concepts ◽  
Its Sequences ◽  
Phylogenetic Species ◽  
Closely Related Species ◽  
Rdna Its ◽  
Rdna Its Sequences ◽  
Distinguishing Character

Cortinarius alpinus as an example for morphological and phylogenetic species concepts in ectomycorrhizal fungiExtensive morphological and molecular analyses of closely related species from alpine, subalpine and montane habitats should enable a comparison of ecological, morphological and phylogenetic species concepts in ectomycorrhizal mushrooms. One fundamental question of this study was whether alpine species really exist, and which criteria, besides the specific habitat, could reliably be used for the de-limitation of such taxa. For this reason, 56 rDNA ITS sequences were generated or downloaded from GenBank for 10 closely related species of Cortinarius subgenus Myxacium, section Myxacium. Several collections were sequenced for each of the following taxa: Cortinarius absarokensis, C. alpinus, C. favrei, C. fennoscandicus, C. grallipes, C. mucosus, C. muscigenus, C. septentrionalis, C. trivialis and C. vernicosus. Moreover, spore statistics were carried out for 38 collections of alpine and subalpine taxa. These data provide clear evidence for C. favrei being a synonym of C. alpinus. C. absarokensis and C. alpinus can clearly be delimited based on pileus diameter and average dry weight per basidiome, even in overlapping habitats, but spore size and shape is not a good distinguishing character. Phylograms have very short branches, and base differences between ITS sequences are generally very low in this group, and give no resolution for the included taxa of this section. Based on these results, species concepts of ectomycorrhizal mushrooms are discussed in detail.

Species delimitation of colour polymorphic Cladophorus (Coleoptera: Lycidae) from New Guinea

Zootaxa ◽  
2017 ◽  
Vol 4320 (3) ◽  
pp. 505 ◽  
Author(s):  
ROMANA KALOUSOVA ◽  
LADISLAV BOCAK
Keyword(s):  
Phylogenetic Analysis ◽  
Mitochondrial Dna ◽  
Related Species ◽  
Species Delimitation ◽  
Morphological Differentiation ◽  
Morphological Characters ◽  
Molecular Data ◽  
Closely Related Species ◽  
Dna Fragment ◽  
Colour Patterns

Cladophorus Guérin-Méneville, 1830 are endemic Papuan net-winged beetles which take part in highly diverse Müllerian mimicry rings. Available specimens were sequenced for cox1–tRNA-Leu–cox2 mitochondrial DNA fragment and the species delimitations were based on the genetic distance, phylogenetic analysis, and morphology. Three earlier described species were identified in the recently collected material and further 10 species are described: C. pallescens sp. nov., C. bicolor sp. nov., C. craterensis sp. nov., C. motykai sp. nov., C. mindikensis sp. nov., C. kailakiensis sp. nov., C. manokwarensis sp. nov., C. haiaensis sp. nov., C. humeralis sp. nov., and C. boceki sp. nov. DNA-based identifications provided some ambiguous results and closely related species could not be robustly delimited using solely molecular data. Additionally, the species limits were based on clearly defined morphological characters and the morphological differentiation was found unlinked from the genetic divergence. Colour patterns cannot be used for identification because all species available in more specimens were polymorphic and followed various local co-mimics. The Papuan fauna of Cladophorus is very diverse and the closely related species regularly occur in limited regions. Differentiation within restricted ranges is therefore considered as the main speciation mode. 

Morphology and description of Helicotylenchus crassatus n. sp. (Nematoda: Hoplolaimidae) from eastern Canada

1973 ◽  
Vol 51 (11) ◽  
pp. 1195-1200 ◽  
Author(s):  
R. V. Anderson
Keyword(s):  
Related Species ◽  
Diagnostic Value ◽  
Eastern Canada ◽  
Closely Related Species ◽  
Parasitic Species ◽  
Head Skeleton ◽  
Vaginal Sphincter ◽  
Plant Parasitic

A new plant parasitic species of the genus Helicotylenchus Steiner, 1945, common to eastern Canada, is described and illustrated. Helicotylenchus crassatus can be distinguished from closely related species by the sclerotization of the head skeleton, size and position of the anterior cephalid, and thickness of the vagina. The morphology and diagnostic value of the head skeleton, hypodermal commissures, vulva, vagina, vaginal sphincter, and oviduct are discussed.

Axial Inlet Conversion to a Centrifugal Compressor With Magnetic Bearings

1992 ◽  
Author(s):  
Tom Novecosky
Keyword(s):  
United States ◽  
British Columbia ◽  
Natural Gas ◽  
Centrifugal Compressor ◽  
Axial Compressor ◽  
Magnetic Bearings ◽  
Operating Costs ◽  
Eastern Canada ◽  
The Past ◽  
Compressor Efficiency

NOVA’s Alberta Gas Transmission Division transports natural gas via pipeline throughout the province of Alberta, Canada, exporting it to eastern Canada, United States and British Columbia. It is a continuing effort to operate the facilities and pipeline at the highest possible efficiency. One area being addressed to improve efficiency is compression of the gas. By improving compressor efficiency, fuel consumption and hence operating costs can be reduced. One method of improving compressor efficiency is by converting the compressor to an axial inlet configuration, a conversion that has been carried out more frequently in the past years. Concurrently, conventional hydrodynamic bearings have been replaced with magnetic bearings on many centrifugal compressors. This paper discusses the design and installation for converting a radial overhung unit to an axial inlet configuration, having both magnetic bearings and a thrust reducer. The thrust reducer is required to reduce axial compressor shaft loads, to a level which allows the practical installation of magnetic bearings within the space limitations of the compressor (Bear and Gibson, 1992).

Two new species of the genus Crangonyx Bate, 1859 (Amphipoda: Crangonyctidae) from the St. Marks River Basin with notes on the “Crangonyx floridanus complex”

Zootaxa ◽  
2019 ◽  
Vol 4691 (4) ◽  
pp. 301-332 ◽  
Author(s):  
ANDREW G. CANNIZZARO ◽  
THOMAS R. SAWICKI
Keyword(s):  
New Species ◽  
Related Species ◽  
Species Delimitation ◽  
Species Complex ◽  
Morphological Characteristics ◽  
Molecular Data ◽  
Closely Related Species ◽  
Leon County ◽  
Two New Species ◽  
Morphological And Molecular Data

Crangonyx ephemerus n. sp. and Crangonyx pseudoephemerus n. sp. are described from the headwaters of the St. Marks River in Leon County, Florida, based on detailed morphological and molecular comparisons with the closely related species Crangonyx floridanus Bousfield, 1963. The morphological and molecular data, including three species delimitation models, lend support to the hypothesis that the taxon C. floridanus sensu lato represents a species complex. Diagnostic morphological characteristics are highlighted and discussed within this group to assist in future morphological analyses. 

The “index of the copulatory apparatus” and its application to the systematics of freshwater pulmonates (Mollusca: Gastropoda: Pulmonata)

2011 ◽  
Vol 20 (1) ◽  
pp. 11-27 ◽  
Author(s):  
M.V. Vinarski
Keyword(s):  
Related Species ◽  
Species Delimitation ◽  
Single Specimen ◽  
Closely Related Species ◽  
Copulatory Apparatus ◽  
Pond Snails ◽  
Different Origin

The index of the copulatory apparatus (ICA) is calculated as the ratio between lengths of the praeputium and the penis sheath in the copulatory apparatus in freshwater pulmonate mollusks. ICA is often used for species’ delimitation and identification in different taxa of pulmonates, however, its variation (in both intra- and interspecific levels) is still poorly studied that may make troubles for systematicists. The variation of ICA in pond snails (family Lymnaeidae Rafinesque, 1815) has been studied in several aspects (intra- and interpopulation, interspecific). It has been shown that the index varies considerably, and it is almost impossible to identify a single specimen on the base of ICA solely. However, mean ICA values are more useful for taxonomic and identification purposes. Closely related species of lymnaeids demonstrate some extent of overlap between their ranges of ICA variation that hampers their identification but is not a cause for synonymisation. The factors of different origin that potentially may influence the ICA values in freshwater pulmonates have been reviewed. It is revealed that ICA manifests significant ontogenic and (in some lymnaeid species) geographical changes. The use of ICA in pulmonate systematics should be accompanied by data on variation in another characters of conchological or anatomical kind.

Scarabaeid Pests: Subfamily Cetoniinae

2020 ◽  
pp. 186-192
Author(s):  
Patricia J. Vittum
Keyword(s):  
United States ◽  
Related Species ◽  
Soil Surface ◽  
Eastern United States ◽  
Closely Related Species ◽  
Green June Beetle

This chapter discusses the green June beetle, which is a member of the order Coleoptera, family Scarabaeidae, subfamily Cetoniinae. Adults of this subfamily have the epimeron of the mesothorax visible from above. This beetle feeds on ripe, thin-skinned fruits. Another closely related species, C. mutabilis, is called the figeater and is sometimes confused with the green June beetle. Historically, the green June beetle was considered a turfgrass pest of regional importance, but activity of this species has increased on turfgrass throughout the eastern United States. Turf damage by this insect primarily is mechanical rather than being caused by feeding; the large (third-instar) grubs disrupt the soil surface by burrowing in the soil and producing mounds. This activity makes mowing difficult and, by exposing and damaging turf roots, can lead to turf loss caused by desiccation and disease.

CYTOTAXONOMY OF CIRSIUM HOOKERIANUM AND RELATED SPECIES

1965 ◽  
Vol 43 (5) ◽  
pp. 597-613 ◽  
Author(s):  
R. J. Moore ◽  
C. Frankton
Keyword(s):  
United States ◽  
British Columbia ◽  
Related Species ◽  
Western United States ◽  
Chromosome Counts

The morphology and distribution of Cirsium hookerianum, a species almost entirely Canadian, and of four related species of the western United States (C. tweedyi, C. scopulorum, C. eatonii, and C. × clavatum) are described and the evolution of the group is discussed. Chromosome counts are reported for C. hookerianum, 2n = 34, 34 + 2 accessories; C. scopulorum, 2n = 34, 34 + 2 accessories; C. tweedyi, 2n = 34. A population of hybrids between C. hookerianum and C. undulatum in British Columbia is described.

Two new Atheta species (Coleoptera: Staphylinidae: Aleocharinae) from eastern Canada: taxonomy, bionomics, and distribution

2007 ◽  
Vol 139 (1) ◽  
pp. 45-53 ◽  
Author(s):  
Jan Klimaszewski ◽  
Christopher G. Majka
Keyword(s):  
New Species ◽  
Nova Scotia ◽  
New Brunswick ◽  
Related Species ◽  
Prince Edward Island ◽  
Eastern Canada ◽  
Closely Related Species ◽  
Black And White

AbstractTwo new athetine beetles from eastern Canada are described and illustrated: Atheta (Metadimetrota) savardae Klimaszewski and Majka, sp. nov. (Nova Scotia, Quebec) and Atheta (Datomicra) acadiensis Klimaszewski and Majka, sp. nov. (Nova Scotia, New Brunswick, Prince Edward Island, and Quebec). Their relationships to other closely related species are discussed, and new data on bionomics and distribution are provided. The new species are presented with a short diagnosis, description, colour habitus images, and black-and-white genital images.

scholarly journals Molecular Phylogenetics of Aedes japonicus, a Disease Vector That Recently Invaded Western Europe, North America, and the Hawaiian Islands

2010 ◽  
Vol 47 (4) ◽  
pp. 527-535 ◽  
Author(s):  
Emilie C. Cameron ◽  
Richard C. Wilkerson ◽  
Motoyoshi Mogi ◽  
Ichiro Miyagi ◽  
Takako Toma ◽  
...  
Keyword(s):  
United States ◽  
Related Species ◽  
Western Europe ◽  
Molecular Phylogenetics ◽  
The United States ◽  
Closely Related Species ◽  
Disease Vector ◽  
Nuclear Locus ◽  
Nicotinamide Adenine Dinucleotide Dehydrogenase ◽  
Cytochrome Oxidase Ii

Abstract We used two mitochondrial loci (nicotinamide adenine dinucleotide dehydrogenase subunit 4 and cytochrome oxidase II) and a nuclear locus (28S-D2 spacer) for a total of 1337 bp to evaluate the relationships among the four subspecies of Aedes (Finlaya) japonicus Theobald. Ae. j. japonicus was recently introduced into the United States and has been expanding rapidly. We also included in our analysis a morphologically very closely related species, Aedes (Finlaya) koreicus Edwards, as well as three more distantly related species: Aedes (Finlaya) togoi Theobald, Aedes (Finlaya) hatorii Yamada, and Aedes (Aedimorphus) vexans Meigen. We found that the four subspecies in the Ae. japonicus complex are genetically quite distinct but seem to form a monophyletic group that surprisingly also includes Ae. koreicus, suggesting the need for a taxonomic reconsideration of the group. We also found that the two southern subspecies are more closely related to each other than to any of the remaining subspecies or to Ae. koreicus and may indicate an ancient north-south split of the lineage. Considering the overlap between Ae. j. japonicus and Ae. koreicus, but the stronger association between Ae. koreicus and humans, we are surprised it also has not expanded from its original range. As a proactive reaction to this possibility, we designed and tested a DNA-based rapid assay to differentiate Ae. koreicus from some of the species with which it may be confused in the United States. These Aedes are putative vectors of several important viral encephalitides.

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