Cyclops strenuus (Fischer, 1851) sensu lato in Alaska and Canada, with new records of occurrence

1995 ◽  
Vol 73 (9) ◽  
pp. 1699-1711 ◽  
Author(s):  
Edward B. Reed ◽  
Nancy E. McIntyre
Keyword(s):  
North America ◽  
American Literature ◽  
Northwest Territories ◽  
New Records ◽  
Morphological Parameters ◽  
Passive Dispersal ◽  
Large Area ◽  
Male And Female ◽  
The North ◽  
Interior Alaska

References to Cyclops strenuus in the North American literature are reviewed. Male and female specimens of C. strenuus sensu lato from 20 sites in Alaska, Yukon, Northwest Territories, and Saskatchewan were measured and compared using several morphological parameters. Two or more phenotypes may be present among the 20 populations. The specimens examined differ sharply from Cyclops canadensis Einsle, 1988, especially in the length of the caudal ramus, length of the antennules, width of prosomites 4 and 5, and length of the lateralmost and medialmost terminal caudal setae. Thus, Einsle's conclusion that previous records of C. strenuus in North America are likely referable to C. canadensis may be premature. New records of C. strenuus away from northern coastal areas of Alaska and Canada include Saint Matthew and Nunivak islands, two interior Alaska locations, Galena and Chatanika, and four locations in central and southern Saskatchewan. Passive dispersal via migrating waterfowl may account for the presence of C. strenuus in Saskatchewan. To date, only a very few individuals of C. strenuus s.l. from a very large area in North America have been examined. Final decisions about relationships among Nearctic C. strenuus and their relationships to Palearctic congeners must await the examination of many more animals and investigations using biochemical or chromosomal techniques in conjunction with morphology.

scholarly journals Plauditus cestus (Provonsha & McCafferty, 1982) (Insecta: Ephemeroptera: Baetidae): New records from Virginia and the Northwest Territories, with notes on color variation

Check List ◽  
2014 ◽  
Vol 11 (1) ◽  
pp. 1498 ◽  
Author(s):  
Melissa R. Gorski ◽  
Autumn D. E. Fox ◽  
Jordan I. McQueen ◽  
Luke M. Jacobus
Keyword(s):  
North America ◽  
Northwest Territories ◽  
Abdominal Segment ◽  
New Records ◽  
Color Variation ◽  
Aquatic Habitats ◽  
Far North ◽  
Color Variant

Plauditus cestus (Provonsha & McCafferty, 1982) is widespread in eastern and central North America. We provide new data from Virginia that fill a gap in the range of distribution and new data from the Northwest Territories that extend the range of the species by over 1900 km to the northwest. The Northwest Territories specimen represents a new larval color variant, with pronounced coloration of abdominal segment 6. We emphasize the need for additional sampling of aquatic habitats in the Far North.

A 200-Year Perspective of Climate Variability and the Response of White Spruce in Interior Alaska

2003 ◽  
Author(s):  
Glenn Patrick Juday ◽  
Valerie Barber
Keyword(s):  
Nineteenth Century ◽  
North America ◽  
Climate Variability ◽  
Tree Ring ◽  
Tree Growth ◽  
White Spruce ◽  
Boreal Region ◽  
The North ◽  
Interior Alaska ◽  
Summer Temperatures

The two most important life functions that organisms carry out to persist in the environment are reproduction and growth. In this chapter we examine the role of climate and climate variability as controlling factors in the growth of one of the most important and productive of the North American boreal forest tree species, white spruce (Picea glauca [Moench] Voss). Because the relationship between climate and tree growth is so close, tree-ring properties have been used successfully for many years as a proxy to reconstruct past climates. Our recent reconstruction of nineteenth- century summer temperatures at Fairbanks based on white spruce tree-ring characteristics (Barber et al. in press) reveals a fundamental pattern of quasi-decadal climate variability. The values in this reconstruction of nineteenth-century Fairbanks summer temperatures are surprisingly warm compared to values in much of the published paleoclimatic literature for boreal North America. In this chapter we compare our temperature reconstructions with ring-width records in northern and south-central Alaska to see whether tree-growth signals in the nineteenth century in those regions are consistent with tree-ring characteristics in and near Bonanza Creek (BNZ) LTER (25 km southwest of Fairbanks) that suggest warm temperatures during the mid-nineteenth century. We also present a conceptual model of key limiting events in white spruce reproduction and compare it to a 39-year record of seed fall at BNZ. Finally, we derive a radial growth pattern index from white spruce at nine stands across Interior Alaska that matches recent major seed crop events in the BNZ monitoring period, and we identify dates after 1800 when major seed crops of white spruce, which are infrequent, may have been produced. The boreal region is characterized by a broad zone of forest with a continuous distribution across Eurasia and North America, amounting to about 17% of the earth’s land surface area (Bonan et al. 1992). The boreal region is often conceived of as a zone of relatively homogenous climate, but in fact a surprising diversity of climates are present. During the long days of summer, continental interior locations under persistent high-pressure systems experience hot weather that can promote extensive forest fires frequently exceeding 100 kilohectares (K ha). Summer daily maximum temperatures are cooled to a considerable degree in maritime portions of the boreal region affected by air masses that originate over the North Atlantic, North Pacific, or Arctic Oceans.

Mosses of the Nahanni and Liard ranges area, southwestern Northwest Territories

1979 ◽  
Vol 57 (3) ◽  
pp. 269-283 ◽  
Author(s):  
Dale H. Vitt ◽  
Diana G. Horton
Keyword(s):  
Northwest Territories ◽  
North American ◽  
Rocky Mountains ◽  
National Park ◽  
Small Area ◽  
New Records ◽  
The South ◽  
Moss Species ◽  
Mountain Ranges ◽  
The North

The Nahanni and Liard mountain ranges are located at about 61° N latitude and 122° W longitude. They form the easternmost slopes of the Rocky Mountains and lie just east of Nahanni National Park in the southwestern corner of the District of Mackenzie, Northwest Territories. The moss flora of the area is rich in the number of taxa; 207 species and two varieties are reported from this relatively small area. Of these, 53 species are new records for the South Nahanni region. A number of rare or disjunct bryophyte species are found in the area. Moss species which are either disjunct or occur at the edge of their range include Arctoa fulvella (Dicks.) B.S.G., Aulacomnium acuminatum (Lindb. & Arn.) Kindb., Andreaeobryum macrosporum Steere & B. Murray, Geheebia gigantea (Funck) Boul., Isopterygiopsis muelleriana (Schimp.) Iwats., Mnium spinosum (Voit) Schwaegr., Psilopilum cavifolium (Wils.) Hagen, Rhabdoweisia crispata (With.) Lindb., Seligeria calcarea (Hedw.) B.S.G., S. polaris Berggr., Trematodon brevicollis Hornsch., and Trichostomum arcticum Kaal. The North American distribution of these species is mapped. Herbertus stramineus (Dum.) Trev., Metacalypogeia schusterana Hatt. & Mizut., Scapania crassiretis Bryhn, and S. simmonsii Bryhn & Kaal. are four hepatic species of phytogeographic interest.

scholarly journals On finding of Monocorophium insidiosum Crawford, 1937 (Amphipoda, Corophiidae) in the coastal waters of Crimea (Black Sea), a new species for this region

2018 ◽  
Vol 3 (2) ◽  
pp. 33-39
Author(s):  
V. A. Grintsov
Keyword(s):  
North America ◽  
Black Sea ◽  
Coastal Waters ◽  
The Black Sea ◽  
Morphological Parameters ◽  
The North ◽  
Sea Literature ◽  
Males And Females ◽  
Hydrobiological Research ◽  
A New Species

An illustrated description of morphology of Monocorophium insidiosum Crawford, 1937 from the Crimean coastal waters is given. In this work, 744 specimens from different locations and substrates of the Crimean coastal waters have been analyzed. The main specific parameters of species from the Crimean coastal waters are as follows: rostrum of males is about one half of first article of antenna I length, dactylus of gnathopod II is equipped with 2–4 additional spines along the inner side (both for males and females). Variability is observed in parameters of the following parts: first article of antenna I peduncle, fourth article of antenna II peduncle, inner side of gnathopod II dactylus, and outer sides of the outer and inner rami of uropod II. Morphological parameters of specimens from the Black Sea, the Mediterranean Sea (literature data), and the North America coast (Vancouver area, literature data) have been compared. Specimens from the Black Sea are morphologically similar, but have some differences from the North American ones. In particular, first article of antenna I peduncle of specimens from the North America have conical process (specimens from the Black Sea have rounded process); fifth article of antenna II peduncle is with proximal medial tooth (specimens from the Black Sea are without proximal medial tooth); and outer ramus of uropod II has medial spine (Mediterranean specimens are without such a spine). These differences should be taken into account when carrying out hydrobiological research.

A GENERIC REVISION OF THE NORTH AMERICAN HELIOTHIDINAE (LEPIDOPTERA: NOCTUIDAE)

1970 ◽  
Vol 102 (S73) ◽  
pp. 5-59 ◽  
Author(s):  
David F. Hardwick
Keyword(s):  
North America ◽  
Phylogenetic Relationship ◽  
North American ◽  
Type Species ◽  
Close Similarity ◽  
Check List ◽  
Male And Female ◽  
The North ◽  
Relationship Of ◽  
Lepidoptera Noctuidae

AbstractThe noctuid subfamily Heliothidinae, which is represented in North America by 158 species, is redefined, largely on the basis of male genitalic characters. Of genera included in the subfamily in McDunnough's 1938 check list, only four are recognized as valid, these being Heliothis Ochs., Schinia Hbn., Heliolonche Grt., and Melaporphyria Grt. Helicoverpa Hdwk., which was described subsequent to the appearance of McDunnough's list, and Protoschinia which is described as new here, are also included. Grotella Harv., Hemigrotella B. & McD., and Neogrotella B. & B. are not considered heliothidine genera and are removed to the Stiriinae.Eight genera, which have been assigned to the Amphipyrinae because they lack the mid and hind tibial setae characteristic of other heliothidine components, have also been incorporated in the Heliothidinae; these genera are Microhelia Hamp., Heliothodes Hamp., Baptarma Sm., Eutricopis Morr., Derrima Wlk., Erythroecia Hamp., Rhodoecia Hamp., and Pyrrhia Hbn. Because of the close similarity in structure and habits between these genera and those previously mentioned, the two groups are considered to constitute a monophyletic assemblage within the Noctuidae, despite the discrepancy with respect to mid and hind tibial setae.A key to the 14 North American genera of the Heliothidinae is presented. Descriptions of genera and figures of the male and female genitalia of the type species of all valid genera and of many genera in synonymy are provided. Canthylidia Butl. and Timora Wlk. are newly synonymized to Heliothis, and Heliosea Grt. to Heliolonche Grt. A check list of the North American Heliothidinae is appended to the text.The possible phylogenetic relationship of the Heliothidinae to the Stiriinae is discussed. The latter group is raised from tribal rank in the Amphypyrinae to subfamily rank; a number of genera are added to it, and a provisional redefinition of the subfamily is presented.

scholarly journals New records of Burgess Shale-type taxa from the middle Cambrian of Utah

2015 ◽  
Vol 89 (3) ◽  
pp. 411-423 ◽  
Author(s):  
Simon Conway Morris ◽  
Paul A. Selden ◽  
Glade Gunther ◽  
Paul G. Jamison ◽  
Richard A. Robison
Keyword(s):  
New Species ◽  
North America ◽  
Northwest Territories ◽  
Type Species ◽  
New Records ◽  
Western North America ◽  
Burgess Shale ◽  
Middle Cambrian ◽  
Stem Group ◽  
A New Species

AbstractCambrian strata of the Laurentian craton contain numerous examples of Burgess Shale–type faunas. Although displaying a more or less concentric distribution around the cratonal margin, most faunal occurrences are in present-day western North America, extending from the Northwest Territories to California. Nevertheless, the soft-bodied and lightly skeletalized fossils in most of these Lagerstätten are highly sporadic. Here, we extend knowledge of such Middle Cambrian occurrences in Utah with reports of four taxa. An arthropod from the Marjum Formation, Dytikosicula desmatae gen. et sp. nov., is a putative megacheiran. It is most similar to Dicranocaris guntherorum, best known from the younger Wheeler Formation, but differs primarily in the arrangement of pleurae and overall size. Along with a specimen of ?Yohoia sp, a new species of Yohoia, Y. utahana sp. nov., is described. It differs from the type and only known species, Y. tenuis, principally in its larger size and shorter exopods; it is the first description of this genus from outside the Burgess Shale. A new species of a stem-group lophotrochozoan from the Spence Shale, Wiwaxia herka sp. nov., possesses a palisade of dorso-lateral spines that are more robust and numerous than the type species of Wiwaxia, W. corrugata. Another notable taxon is Eldonia ludwigi from the Marjum Formation, which is interpreted as a primitive ambulacrarian (assigned to the cambroernids) and a new specimen of the ?cnidarian Cambrorhytium from the Wheeler Shale is illustrated.

Synopsis of the Nearctic Species of Stenodema Laporte, and Description of a New Species from Western Canada (Hemiptera: Miridae)

1961 ◽  
Vol 93 (6) ◽  
pp. 450-455 ◽  
Author(s):  
Leonard A. Kelton
Keyword(s):  
New Species ◽  
North America ◽  
American Literature ◽  
North American ◽  
Male Genitalia ◽  
Western Canada ◽  
The North ◽  
A New Species ◽  
Male Genital

Recent study of the male genitalia in the Miridae (Kelton, 1959) showed that the Palearctic Stenodema virens (L.) does not occur in North America. The six other species that have been reported in the North American literature are: dorsolis (Say), vicinum (Prov.), trispinosum Reut., sequoiae Bliven, falki Bliven, and imperii Bliven. The three species described by Bliven (1955, 1958) were not available to me for study, however, Bliven (1960) has recently published a paper containing figures of the male genital claspers of these species. These appear to differ considerably from those of virens, vicinum and trispinosum as well as amongst themselves.

On the presence of North American clubmoss Huperzia lucidula (Lycopodiaceae) in China: An intercontinental disjunction or misidentification

Phytotaxa ◽  
2015 ◽  
Vol 219 (3) ◽  
pp. 243 ◽  
Author(s):  
Nawal Shrestha ◽  
Xian-Chun Zhang
Keyword(s):  
North America ◽  
American Literature ◽  
North American ◽  
Chinese Literature ◽  
Intergenic Spacer ◽  
Molecular Study ◽  
New Combination ◽  
Disjunct Distribution ◽  
Separate Species ◽  
The North

The North American shining clubmoss, Huperzia lucidula, was originally thought to be endemic to North America. However it was reported from China by Ren Chang Ching in 1981, and hence was believed to have a disjunct distribution in North America and Asia. Since then, in all Chinese literature H. lucidula has been described as a disjunct taxon, although in North American literature it has nearly always only been reported from eastern North America. The studies on the Chinese taxon are at present insufficient to address this taxonomical and biogeographical disparity. In this study we have attempted to unravel this issue using integrative morphological and molecular analyses. Morphological study included a thorough examination of specimens from the entire distribution range of H. lucidula in the USA, Canada and China following field collections. Molecular study included Maximum Likelihood and Bayesian inference phylogenetical analyses of three chloroplast markers: the genes rbcL and matK and the psbA-trnH intergenic spacer. The results showed distinct morphological differences between the North American and Chinese taxa, sufficient to recognize them as separate species. The molecular results corroborated these findings and supported the separation of the two taxa. Based on our results, the Chinese taxon is neither a variant of H. lucidula nor sister to it and therefore the supposed disjunct distribution of H. lucidula is erroneous and a result of misidentification. The Chinese taxon that was firstly reported by Ching as H. lucidula var. asiatica has been elevated to the species rank and a new combination has been made.

A new Early Cretaceous articulate brachiopod from the Northwest Territories, Canada, and its paleobiogeographic significance

1990 ◽  
Vol 64 (3) ◽  
pp. 367-372 ◽  
Author(s):  
Michael R. Sandy
Keyword(s):  
North America ◽  
Northwest Territories ◽  
Early Cretaceous ◽  
New Record ◽  
High Latitudes ◽  
American Continent ◽  
North American Continent ◽  
The North ◽  
Northwest Europe ◽  
Central Atlantic

A new terebratellid brachiopod species, Modestella jeletzkyi n. sp., is described from the Early Cretaceous of Prince Patrick Island, Northwest Territories, Canada. The occurrence extends the paleobiogeographic range of Modestella from northwest Europe into the northern high-latitudes of the North American continent. This new record of Modestella suggests brachiopod dispersal between northwest Europe and North America via the East Greenland Seaway, probably during the Albian. The occurrences of two other Cretaceous terebratellid genera, Advenina and Psilothyris, are updated. They are both homeomorphic with Modestella. Advenina, from the Tethyan and Jura regions of Europe, is now recorded from the Early Cretaceous of Sardinia. The occurrence of Psilothyris in North America and Europe is best explained by dispersal through the opening central Atlantic Ocean, indicating the continuation of Hispanic Corridor-type faunal links established during the Jurassic.

Lichens from the area drained by the Peel and Mackenzie rivers, Yukon and Northwest Territories, Canada. I. Macrolichens

1980 ◽  
Vol 58 (18) ◽  
pp. 1947-1985 ◽  
Author(s):  
Charles D. Bird ◽  
John W. Thomson ◽  
Alfred H. Marsh ◽  
George W. Scotter ◽  
Pak Yau Wong
Keyword(s):  
North America ◽  
Northwest Territories ◽  
Plant Communities ◽  
Coniferous Forest ◽  
Yukon Territory ◽  
High Mountains ◽  
The North ◽  
Major Tributary ◽  
Mackenzie River

The distribution and general ecology of 249 macrolichen taxa is described for 230 000 km2 of coniferous forest, open fens, and alpine terrain along the Mackenzie River in the District of Mackenzie, Northwest Territories, and the Peel River, a major tributary which rises in the Yukon Territory. Permafrost plays a major role in determining the plant communities that are present. Fire and man-made disturbances initiate succession. There are 45 new reports for the District of Mackenzie and 30 for the Yukon. Of the taxa, 86% are found in Europe, Asia, and North America, 9% are known from Asia and North America, whereas only 4% are restricted to North America. Pilophorus robustus is new to Canada. High mountains in the western part of the area, generally nonglaciated during the Wisconsinian, support a flora that contains many Arctic and Arctic–Alpine taxa. Amphi-Beringian species occur primarily in the north.

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