Early Cambrian coral-like fossils from the Northern Cordillera of Western Canada

1969 ◽  
Vol 6 (4) ◽  
pp. 782-785 ◽  
Author(s):  
Robert C. Handfield
Keyword(s):  
British Columbia ◽  
Western Canada ◽  
Early Cambrian ◽  
Conical Shells ◽  
External Wall ◽  
The Family ◽  
Mackenzie Mountains

Tabulaconus kordeae, n. gen., n. sp., is a coral-like fossil found in the Sekwi Formation, Mackenzie Mountains, District of Mackenzie and the Atan Group, Cassiar Mountains, British Columbia. The species consists of small, conical shells with a layered external wall and abundant tabulae. It is placed in the family Gastroconidae, previously known only from Siberia. Associated Archaeocyatha and Trilobita prove its Early Cambrian age.

Helmolepis cyphognathus, sp. nov., a new platysiagid actinopterygian from the Lower Triassic Sulphur Mountain Formation (British Columbia, Canada)

2005 ◽  
Vol 42 (1) ◽  
pp. 25-36 ◽  
Author(s):  
Andrew G Neuman ◽  
Raoul J Mutter
Keyword(s):  
British Columbia ◽  
New Species ◽  
Central Europe ◽  
Middle Triassic ◽  
Lower Triassic ◽  
Western Canada ◽  
Early Triassic ◽  
East Greenland ◽  
The Family ◽  
A New Species

A new species of stem actinopterygian, Helmolepis cyphognatus sp. nov., is reported from the Lower Triassic Sulphur Mountain Formation of western Canada (probably Smithian). This taxon differs from the only other known Early Triassic platysiagid, H. gracilis from the Lower Triassic Wordie Creek Formation of East Greenland (Griesbachian), in counts of branchiostegal rays, shape of the maxilla, shape (and possibly counts) of extrascapulars, and the size ratio of major opercular bones. In spite of their overall unfavorable preservation, the numerous available specimens amend our knowledge of the little known genus Helmolepis considerably: it has become evident that the morphology of Helmolepis cyphognatus sp. nov. comes closest to Platysiagum minus (Middle Triassic Besano Formation of central Europe). This study suggests placement of the two genera in the family Platysiagidae. Investigation of this new species also shows certain features of the cheek and the caudal fin are more primitive than previously believed, whereas the snout region is probably derived but of yet uncertain affinities in Helmolepis.

Early Cambrian braid-delta deposits, MacKenzie Mountains, north-western Canada

Sedimentology ◽  
1997 ◽  
Vol 44 (4) ◽  
pp. 587-609 ◽  
Author(s):  
ROBERT MACNAUGHTON ◽  
ROBERT DALRYMPLE ◽  
GUY NARBONNE
Keyword(s):  
Western Canada ◽  
Early Cambrian ◽  
Mackenzie Mountains ◽  
North Western

scholarly journals Presence of Naraoia Walcott, 1912 (Nektaspida, Arthropoda) in the middle Cambrian of Europe (Murero, NE Spain)

2018 ◽  
Vol 33 (1) ◽  
pp. 83
Author(s):  
Rodolfo Gozalo ◽  
Mª Eugenia Dies-Álvarez ◽  
José Antonio Gámez VIintaned ◽  
Juan B. Chirivella ◽  
Eladio Liñan
Keyword(s):  
British Columbia ◽  
First Record ◽  
Early Cambrian ◽  
Burgess Shale ◽  
Evolutionary Potential ◽  
Middle Cambrian ◽  
The Family ◽  
Ne Spain

 The genus Naraoia Walcott, 1912, a Burgess Shale-type fossil known from the lower and middle Cambrian of British Columbia (Canada), Idaho and Utah (USA), as well as from Yunnan and Guizhou provinces (China), is now reported from the middle Cambrian of Murero (Zaragoza, Spain), which is the first record in the Acadobaltic province. The only fragmented specimen found is determined as Naraoia sp., its age being Pardailhania multispinosa Zone (Drumian Stage). This new datum reinforces the hypothesis of the existence of a cosmopolitan faunal substrate in early Cambrian times, which is to some extent refl ected in the mid Cambrian by faunal groups of low evolutionary potential as the family Naraoiidae and other soft-bodied fossil taxa.

Archaeocyathids and the Lower Cambrian Continental Shelf of the Canadian Cordillera

1975 ◽  
Vol 12 (12) ◽  
pp. 2014-2020 ◽  
Author(s):  
C. R. Stelck ◽  
A. S. Hedinger
Keyword(s):  
British Columbia ◽  
Continental Shelf ◽  
Lower Cambrian ◽  
Rocky Mountain ◽  
Canadian Cordillera ◽  
Western Canada ◽  
Early Cambrian ◽  
Structural Trend ◽  
East And West

The geographic occurrences of archaeocyathids are plotted for the Cordilleran region of western Canada. The archaeocyathids are found both east and west of, and within the Rocky Mountain Trench in British Columbia and are found east and west of the Tintina Trench in the southern Yukon. The overall pattern of the occurrences indicates that the shallow neritic portion of the continental shelf in Early Cambrian time traces a pattern widely diverse from that of the later, superimposed, Laramide structural trend. Portions of the continental shelf were already in existence west of the Rocky Mountain Trench by Early Cambrian time.

A new water mite genus from western Canada (Acari: Parasitengona: Anisitsiellidae)

1977 ◽  
Vol 55 (5) ◽  
pp. 877-881 ◽  
Author(s):  
David Barr
Keyword(s):  
British Columbia ◽  
New Genus ◽  
Western Canada ◽  
Dorsal Shield ◽  
New Genus And Species ◽  
Water Mite ◽  
The Family ◽  
Mite Genus

A new genus and species of the Anisitsiellidae, collected from a seepage area in central British Columbia, is described. The genus is noteworthy because, like Bandakia, it has a complete, unsculptured dorsal shield and the fourth tarsi bear well-developed terminal claws, although the appearance of a gland opening in coxa I is unique. The possession of a simple palp in this mamersopsoid genus further serves to justify the inclusion of the genera formerly belonging to the family Mamersopsidae within the family Anisitsiellidae.

scholarly journals Challenging the Stereotypes: Unexpected Features of Sexual Exploitation among Homeless and Street-Involved Boys in Western Canada

2021 ◽  
Vol 18 (11) ◽  
pp. 5898
Author(s):  
Elizabeth M. Saewyc ◽  
Sneha Shankar ◽  
Lindsay A. Pearce ◽  
Annie Smith
Keyword(s):  
British Columbia ◽  
Sexual Exploitation ◽  
Western Canada ◽  
Youth Health

Research about the sexual exploitation of homeless and street-involved boys is limited and often combined with that of girls. As aggregation can distort unique issues among genders which are exploited, this study provides information about the context of exploitation for homeless boys. Boys participated in the anonymous, multi-city British Columbia (BC), Canada Homeless and Street-Involved Youth Health paper surveys of 2006 and 2014. Measures included questions about trading sex for money, shelter, or other consideration; age first exploited; for whom; where they were living when first traded sex; gender of exploiters; and demographics. Analyses, separately for younger/older boys, explored the prevalence, timing of exploitation vs. homelessness, and ANOVAs to evaluate the patterns of the age of first exploitation by the genders of exploiters. Just over one in four boys reported exploitation (n = 132), with a median age of 14–15 in most groups. Most were runaway or homeless before their first exploitation, but 25.5% (2006) and 41% (2014) were living with family. Most boys were exploited by women (78%–85%), with 62%–65% were exclusively exploited by women.

Impact of cultivars and herbicides on weed management in alfalfa

2006 ◽  
Vol 86 (3) ◽  
pp. 875-885 ◽  
Author(s):  
J. R. Moyer ◽  
S. N. Acharya
Keyword(s):  
British Columbia ◽  
Weed Control ◽  
Weed Management ◽  
Forage Quality ◽  
Western Canada ◽  
Downy Brome ◽  
Weed Species ◽  
Standard Type ◽  
Southern Alberta ◽  
Medicago Sativa L

Weeds, especially dandelion (Taraxacum officinale Weber in F.H. Wigg.), tend to infest a forage alfalfa (Medicago sativa L.) stand 2 to 4 yr after establishment. To develop better weed management systems, experiments were conducted at Lethbridge, Alberta, from 1995 to 2002 and Creston, British Columbia, from 1998 to 2001, which included the alfalfa cultivars Beaver (standard type) and AC Blue J (Flemish type) and annual applications of metribuzin and hexazinone. These herbicides are registered for weed control in irrigated alfalfa in Alberta and alfalfa grown for seed. In addition, two sulfonylurea herbicides, metsulfuron and sulfosulfuron, and glyphosate were included. All of the herbicides except glyphosate controlled or suppressed dandelion and mustard family weeds. Metsulfuron at 5 g a.i. ha-1 almost completely controlled dandelion at both locations. However, after metsulfuron application at Lethbridge, dandelion was replaced with an infestation of downy brome, which is unpalatable for cattle. None of the herbicides increased total forage (alfalfa + weed) yield, and in some instances herbicides reduced forage quality by causing a shift from a palatable to an unpalatable weed species. However, it was observed that AC Blue J consistently yielded more than Beaver, and weed biomass was consistently less in the higher-yielding cultivar. AC Blue J was developed primarily for the irrigated area in southern Alberta and for southern British Columbia. Therefore, additional experiments should be conducted to determine which alfalfa cultivars have the greatest ability to compete with weeds in other regions of western Canada. Key words: Alfalfa yield, dandelion, forage quality, weed control

The Caragana Aphid, Acyrthosiphon caraganae (Cholod.) in Western Canada, and its Separation from the Pea Aphid

1962 ◽  
Vol 94 (10) ◽  
pp. 1075-1077 ◽  
Author(s):  
A. G. Robinson ◽  
G. A. Bradley
Keyword(s):  
British Columbia ◽  
North America ◽  
Chemical Control ◽  
Pea Aphid ◽  
Annual Reports ◽  
Western Canada ◽  
Forest Insect ◽  
Disease Survey ◽  
Caragana Arborescens

Except for occasional references in the Annual Reports of the Forest Insect and Disease Survey of infestations of an aphid on caragana (Caragana arborescens Lam.) in Western Canada and a note on chemical control (Bradley, 1952), there is no published record known to the authors of the occurrence of the caragana aphid, Acyrthosiphon caraganae (Cholod.), in North America. MacNay (1953) summarized reports that severe infesrations of aphids, “probably mainly the caragana aphid”, occurred on caragana in 1952 in the East Kootenays of British Columbia, and at several places in Alberta and Saskatchewan. At some localities 100 per cent defoliation was reported.

Two new species of stalked crinoids from the northeastern Pacific in the genera Gephyrocrinus and Ptilocrinus (Echinodermata, Crinoidea, Hyocrinidae). Effects of ontogeny and variability on hyocrinid taxonomy

Zootaxa ◽  
2011 ◽  
Vol 2825 (1) ◽  
pp. 1 ◽  
Author(s):  
MICHEL ROUX ◽  
PHILIP LAMBERT
Keyword(s):  
British Columbia ◽  
New Species ◽  
Single Species ◽  
Depth Range ◽  
Evolutionary Trend ◽  
Exceptional Collection ◽  
The Family ◽  
Two New Species ◽  
Northeastern Pacific ◽  
Stalked Crinoids

Two new species of deep-sea stalked crinoids belonging to the family Hyocrinidae were collected in the northeastern Pacific. The descriptions contain detailed information on character variations and ontogeny. The five specimens of Gephyrocrinus messingi n. sp. lived at depths ranging from 1,777 m to 2,110 m off British Columbia and California. This new species is the first record of the genus Gephyrocrinus in the Pacific Ocean, which was previously known from only a single species, G. grimaldii, from the northeastern Atlantic at the same depth range. The two species illustrate opposing phenotypes within the same genus. Fifty-eight specimens of the second new species, Ptilocrinus clarki n. sp., were dredged off British Columbia close to the type-locality of P. pinnatus, the type species of the genus Ptilocrinus, but at shallower depths ranging from 1,178 to 1,986 m. This exceptional collection provides significant data on intraspecific variation in the main morphological characters, especially arm pattern. The ontogeny of stalk articulations and the main traits of adoral plate differentiation are described in detail. A complementary investigation on P. pinnatus was conducted using specimens collected by the “Albatross” expedition at a depth of 2,906 m. Despite similarities in external morphology, tegmen and cover plates, the two ptilocrinid species display significant differences in pinnule architecture, aboral cup and stalk articulations. From comparison with Gephyrocrinus messingi n. sp. and Ptilocrinus clarki n. sp., G. grimaldii and P. pinnatus are interpreted as the result of heterochronic development by paedomorphy after ecological or geographic isolation. Pinnule architecture in the two new species suggests first steps in an evolutionary trend toward a rigid box which protects gonad inflation in the proximal part of the pinnule. These new data on Ptilocrinus and Gephyrocrinus create problems in the current taxonomy of the family Hyocrinidae. The main derived characters, especially in pinnule and arm pattern, are used to propose new hypotheses for hyocrinid phylogeny.

scholarly journals Mineral Taxation

1975 ◽  
Vol 13 (1) ◽  
pp. 90
Author(s):  
Murray F. Mackintosh
Keyword(s):  
British Columbia ◽  
New Mineral ◽  
Western Canada ◽  
Resource Industry ◽  
The Future

In these times of rapidly escalating prices for resources, the provinces of Western Canada have turned their attention to extracting from the resource industry higher return for the citizens in an attempt to provide for the future when the resources are near depletion. This phenomenon is especially noticeable in Alberta. In this article Mr. Mackintosh discusses mineral taxation laws in Alberta and compares them with the corresponding laws of Saskatchewan and British Columbia. The author discusses the constitutionality and interpretation of the new mineral taxation laws and raises some specific problems in applying the legislation.

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