Electrophoretic Study of Two Closely Related Species of North American Trichogramma: T. pretiosum and T. deion (Hymenoptera: Trichogrammatidae)

1993 ◽  
Vol 86 (6) ◽  
pp. 702-709 ◽  
Author(s):  
John D. Pinto ◽  
Gary R. Platner ◽  
Clay A. Sassaman
Keyword(s):  
North American ◽  
Related Species ◽  
Electrophoretic Study ◽  
Closely Related Species

The Natural Groups of Species in the Genus Ips De Geer (Coleoptera: Scolytidae) in North America

1963 ◽  
Vol 95 (5) ◽  
pp. 508-516 ◽  
Author(s):  
G. R. Hopping
Keyword(s):  
North America ◽  
North American ◽  
Related Species ◽  
North American Species ◽  
Closely Related Species ◽  
The North ◽  
The World ◽  
Group Relationships ◽  
Natural Groups

AbstractThe genus Ips is one of four closely related genera in the tribe Ipini, sub-tribe Ipina (De Geer 1775, Balachowsky 1949, Nunberg 1954, Hopping 1963). There are now 32 species of Ips recognized in North America, with a few more as yet undescribed. This paper defines the groups of closely related species with observations on the group relationships of species from other parts of the world. Work is in progress to define the North American species in each group.

A TAXONOMIC REVISION OF THE GENUS PSEUDOPHYSALOPTERA BAYLIS, 1934 (NEMATODA: PHYSALOPTERIDAE)

1963 ◽  
Vol 41 (6) ◽  
pp. 1069-1077 ◽  
Author(s):  
G. A. Schad
Keyword(s):  
North American ◽  
Related Species ◽  
Taxonomic Revision ◽  
Distinct Species ◽  
Closely Related Species ◽  
Tentative Identification

The genus Pseudophysaloptera, recognized as a genus distinct from Physatoptera, is tentatively considered monotypic. The several species previously assigned to the genus Pseudophysaloptera, and the closely related species Physaloptera kotlani, have been reduced to one polytypic species, Pseudophysaloptera formosana, with two subspecies, P. f. formosana and P. f. soricina. The former occurs in Oriental species of Suncus, while the latter occurs in Palaearctic and Ethiopian soricid insectivores. North American specimens, which may represent a distinct species, are tentatively assigned to P. f. soricina. Presently available collections are only sufficient for a tentative identification of the Nearctic form.

KARYOLOGY OF NORTH AMERICAN NATRICINE SNAKES (FAMILY COLUBRIDAE) OF THE GENERA NATRIX AND REGINA

1973 ◽  
Vol 15 (2) ◽  
pp. 355-361 ◽  
Author(s):  
C. William Kilpatrick ◽  
Earl G. Zimmerman
Keyword(s):  
Sex Chromosomes ◽  
North American ◽  
Related Species ◽  
Related Genus ◽  
Chromosomal Variation ◽  
Closely Related Species ◽  
Old World ◽  
Water Snake ◽  
The Family

Four species of the water snake genus Natrix have a distinctly different pattern of chromosomal morphology than found in two species of the related genus Regina. Natrix all have a karyotype with seven pairs of large or medium-sized submetacentric autosomes, three pairs of medium-sized subtelocentric autosomes, and seven pairs of small metacentric autosomes. All have a 2n of 36 with a submetacentric Z and submetacentric or subtelocentric W. The autosomal complement of Regina consists of seven pairs of large to medium-sized submetacentrics, five pairs of medium-sized submetacentrics, and five pairs of small metacentrics. The Z and W are both submetacentric chromosomes. The sex chromosomes are easily distinguished in both genera. The relationships of Natrix and Regina and Old World Natrix are discussed, as well as chromosomal variation in closely related species in the family Colubridae.

scholarly journals Evolutionary relationships between drought-related traits and climate shape large hydraulic safety margins in western North American oaks

2021 ◽  
Vol 118 (10) ◽  
pp. e2008987118
Author(s):  
Robert P. Skelton ◽  
Leander D. L. Anderegg ◽  
Jessica Diaz ◽  
Matthew M. Kling ◽  
Prahlad Papper ◽  
...  
Keyword(s):  
North American ◽  
Related Species ◽  
Vascular System ◽  
Xylem Embolism ◽  
Closely Related Species ◽  
Geographic Ranges ◽  
Resistant Species ◽  
Optical Visualization ◽  
Safety Margins ◽  
Dated Phylogeny

Quantitative knowledge of xylem physical tolerance limits to dehydration is essential to understanding plant drought tolerance but is lacking in many long-vessel angiosperms. We examine the hypothesis that a fundamental association between sustained xylem water transport and downstream tissue function should select for xylem that avoids embolism in long-vessel trees by quantifying xylem capacity to withstand air entry of western North American oaks (Quercus spp.). Optical visualization showed that 50% of embolism occurs at water potentials below −2.7 MPa in all 19 species, and −6.6 MPa in the most resistant species. By mapping the evolution of xylem vulnerability to embolism onto a fossil-dated phylogeny of the western North American oaks, we found large differences between clades (sections) while closely related species within each clade vary little in their capacity to withstand air entry. Phylogenetic conservatism in xylem physical tolerance, together with a significant correlation between species distributions along rainfall gradients and their dehydration tolerance, suggests that closely related species occupy similar climatic niches and that species' geographic ranges may have shifted along aridity gradients in accordance with their physical tolerance. Such trends, coupled with evolutionary associations between capacity to withstand xylem embolism and other hydraulic-related traits, yield wide margins of safety against embolism in oaks from diverse habitats. Evolved responses of the vascular system to aridity support the embolism avoidance hypothesis and reveal the importance of quantifying plant capacity to withstand xylem embolism for understanding function and biogeography of some of the Northern Hemisphere’s most ecologically and economically important plants.

The first record of Suillus acidus var. intermedius (Suillaceae, Boletales) for Europe from the Northern Urals

2015 ◽  
Vol 49 ◽  
pp. 204-212
Author(s):  
M. A. Palamarchuk
Keyword(s):  
North American ◽  
Related Species ◽  
Nature Reserve ◽  
First Record ◽  
Morphological Description ◽  
Closely Related Species ◽  
Line Drawings ◽  
Northern Urals ◽  
Tomsk Region

Information on the records of Suillus acidus var. intermedius in the Northern Urals (Pechora-Ilych Nature Reserve) is given. This species, characterized by predominantly North American distribution, was previously noted in Russia only from the Tomsk Region. The finding of the species in Pechora-Ilych Nature Reserve is its first record in Europe. S. acidus var. intermedius is characterized by fruit bodies of the boletoid type, convex, slimy, yellow-brown cap, and stem with ring covered with black glandular dots. From closely related species it differs by acid taste of the cap cuticle (S. subalutaceus), yellowish or yellow-brown cap (S. acidus, S. salmonicolor), the presence of a distinct ring on stem and lacking scales on the cap (S. sibiricus). The article provides a detailed morphological description of the species, accompanied by line drawings and color photos.

The pupal cremaster as a diagnostic character for species of Phyllonorycter (Lepidoptera: Gracillariidae), with description of a new species of the nipponicella complex from Japan

2000 ◽  
Vol 31 (4) ◽  
pp. 387-400 ◽  
Author(s):  
Junko Fujihara ◽  
Tosio Kumata ◽  
Hiroaki Sato
Keyword(s):  
New Species ◽  
Host Plant ◽  
North American ◽  
Related Species ◽  
North American Species ◽  
Diagnostic Character ◽  
Closely Related Species ◽  
Host Plant Preference ◽  
A New Species

AbstractThe pupal cremasters of twelve species of Japanese oak-feeding Phyllonorycter are examined. The cremasters, even those of closely related species, are specifically distinct. Combined with descriptions of European and North American species, the present results indicate that the cremaster can be used as a diagnostic character for the species of Phyllonorycter. A new species, P. persimilis, which was previously confused with P. similis Kumata, and the female of P. nipponicella (Issiki), hitherto unknown, are described. The nipponicella complex including these species is reviewed and the speciation of its members is discussed in relation to diversification of the host plant preference.

The genus Atriplex (Chenopodiaceae) in Canada and Alaska. III. Three hexaploid annuals: A. subspicata, A. gmelinii, and A. alaskensis

1973 ◽  
Vol 51 (10) ◽  
pp. 1715-1723 ◽  
Author(s):  
I. J. Bassett ◽  
C. W. Crompton
Keyword(s):  
North America ◽  
Introduced Species ◽  
North American ◽  
Related Species ◽  
Chromosome Count ◽  
Distribution Data ◽  
Closely Related Species ◽  
Two Populations

Descriptions, illustrations, and distribution data are given for three closely related species of Atriplex native to North America. Most populations of Atriplex subspicata (Nutt.) Rydberg are hexaploid, with a chromosome count of 2n = 54. Two populations were found with counts of 2n = 36. Atriplex gmelinii C. A. Meyer and A. alaskensis S. Watson are hexaploids. Atriplex subspicata has been confused by North American botanists with A. patula L. and A. hastata L. but these introduced species are respectively tetraploid and diploid.

CORRECTION OF A MISUSED GENERIC NAME (LEPIDOPTERA, OLETHREUTIDAE)

1940 ◽  
Vol 72 (12) ◽  
pp. 242-243
Author(s):  
Carl Heinrich
Keyword(s):  
Small Group ◽  
North American ◽  
Related Species ◽  
British Museum ◽  
Closely Related Species ◽  
The North

In my revision of the North American Eucosminae (Bull. 123. U. S. Nat. Museum, p. 172, 1923) I applied the generic name Exentera Grote to a small group of closely related species including improbana Walker (=cressoniana Clemens) and spoliana Clemens. I did this upon the assumption that, in the main, Fernald and others had correctly identified the Grote species. Although I had gone over the Fernald collection at Amherst, Mass., I did not see the Grote types, and assumed they were in the British Museum and so stated in the revision (p. 174).

scholarly journals The version of microevolutionary relationships between the Siberian species Elymus margaritae, E. komarovii, and E. transbaicalensis (Poaceae) according to sequencing of the nuclear gene GBSS1 (waxy)

2020 ◽  
Vol 24 ◽  
pp. 00001
Author(s):  
Alexander Agafonov ◽  
Maria Emtseva ◽  
Elena Shabanova (Kobozeva) ◽  
Sergey Asbaganov
Keyword(s):  
Comparative Study ◽  
North American ◽  
Related Species ◽  
Nuclear Gene ◽  
Nucleotide Sequences ◽  
Gene Fragment ◽  
Genomic Constitution ◽  
Closely Related Species ◽  
The North ◽  
Siberian Species

A comparative study was made of the sequence of the GBSS1 gene fragment in accessions of closely related species Elymus margaritae, E. komarovii, and E. transbaicalensis from Siberia. Nucleotide sequences of the gene were determined for St subgenomes in accessions of E. margaritae and E. komarovii from classical habitats. The StH-genomic constitution was confirmed, and microevolutionary relationships between species were evaluated by constructing the NJ dendrogram. It was shown that variants of the St subgenomes in accessions E. margaritae GUK-1009 and E. komarovii AUK-9803 belong to the North American ancestral line St2 of the genus Pseudoroegneria, in contrast to accessions E. margaritae AUK-0650 and E. komarovii GAR-0501. The latter belong to the Asian branch of St1, together with variants of subgenomes in the species E. gmelinii and E. pendulinus. That is, according to the differentiation levels of the St subgenome, accession E. margaritae GUK-1009 (holotype) is significantly distanted from the accession AUK-0650 (paratype), which in turn is close to accessions of E. komarovii and E. transbaicalensis from East Sayan. According to levels of differentiation of the H subgenome, the studied species did not show noticeable differences.

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