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Plecia Avus
''Plecia avus'' is an extinct species of ''Plecia'' in the March fly family Bibionidae and is solely known from Early Eocene sediments exposed in central southern British Columbia. The species is one of twenty bibionid species described from the Eocene Okanagan Highlands. History & classification The holotype fossil of ''Plecia avus'' was collected by Lawrence Lambe from outcrops of the Allenby Formation along the Tulameen River on 6 August 1906, and then subsequently described by Anton Handlirsch in 1910. The type description was published in his ''Canadian fossil Insects. 5. Insects from the Tertiary lake deposits of the southern interior of British Columbia'', along with a series of 19 other bibionid species. Handlirsch did not include the etymological derivation of species names in the volume. While reviewing the tertiary fossil bibionids of the Eocene Okanagan Highlands, Rice (1959) transferred almost all of the species described by Handlirsch from the genus '' Penth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypotype
In biology, a type is a particular wikt:en:specimen, specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally associated. In other words, a type is an example that serves to anchor or centralizes the defining features of that particular taxon. In older usage (pre-1900 in botany), a type was a taxon rather than a specimen. A taxon is a scientifically named grouping of organisms with other like organisms, a set (mathematics), set that includes some organisms and excludes others, based on a detailed published description (for example a species description) and on the provision of type material, which is usually available to scientists for examination in a major museum research collection, or similar institution. Type specimen According to a precise set of rules laid down in the International Code of Zoological Nomenclature (ICZN) and the ''International Code of Nomenclature for algae, fungi, and plants'' (ICN), the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plecia Transitoria
''Plecia'' is a genus of March flies (Bibionidae) comprising many species, both extant and fossilised. Species Extant species *'' P. acutirostris'' *'' P. adiastola'' *'' P. affinidecora'' *'' P. americana'' *'' P. amplipennis'' *'' P. aruensis'' *'' P. angularis'' *'' P. avicephaliforma'' *'' P. bicuspidata'' *'' P. bifida'' *'' P. bifoliolata'' *'' P. bisulca'' *'' P. boliviana'' *'' P. chinensis'' *'' P. crenula'' *'' P. curtispina'' *'' P. cuspidata'' *'' P. digitiformis'' *'' P. dileracabilis'' *'' P. dimidiata'' *'' P. duplicis'' *'' P. edwardsi'' *'' P. emeiensis'' *'' P. erebea'' *'' P. erebeoidea'' *'' P. forcipiformis'' *'' P. fulvicollis'' *'' P. hadrosoma'' *'' P. hamata'' *'' P. impilosa'' *'' P. intricata'' *'' P. javensis'' *'' P. lateralis'' *'' P. lieftincki'' *'' P. longifolia'' *'' P. longiforceps'' *'' P. lopesi'' *'' P. mandibuliformis'' *'' P. membranifera'' *'' P. multilobata'' *'' P. nagatomii'' *'' P. nearctic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesothermal
In climatology, the term mesothermal is used to refer to certain forms of climate found typically in the Earth's temperate zones. It has a moderate span of temperature, with winters not cold enough to sustain snow cover. Summers are warm within oceanic climate regimes, and hot within continental or subtropical climate regimes. Origin of term The term is derived from two Greek words meaning "having a moderate amount of heat." This can be misinterpreted, however, since the term is actually intended to describe only the temperature conditions that prevail during the winter months, rather than those for the year as a whole. Definition Under the original Köppen climate classification, all places with an average temperature in their coldest month that is colder than , but warmer than , are said to have a mesothermal climate. The isotherm of for the coldest monthly mean temperature, was observed to be the line where the climate was likely cold enough to support a fixed period of cont ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microthermal
In climatology, the term microthermal is used to denote the continental climates of Eurasia and North America. Etymology The word ''microthermal'' is derived from two Greek words meaning "small" and "heat". This is misleading, however, since the term is intended to describe only the temperature conditions that prevail during the winter months, rather than those of the entire year. Characteristics Under the original Köppen climate classification, all places with an average temperature in their coldest month that is colder than -3 °C (26,4 F), are said to have a microthermal climate. The isotherm of -3 °C for the coldest monthly mean temperature, was observed to be the line where the climate was likely cold enough to support a fixed period of continuous snow cover every year. In recent usage, an isotherm of 0°C (32°F) is commonly used instead. Either definition places almost all of the world's microthermal climates in the Northern Hemisphere, as the absence of broad l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesic Habitat
In ecology, a mesic habitat is a type of habitat with a well-balanced or moderate supply of moisture throughout the growing season (e.g., a mesic forest, temperate hardwood forest, or dry-mesic prairie). The term derives from the Greek ''mesos'', meaning middle, indicating its relative moisture content between hydric (moist) and xeric (dry) habitats. The word "mesic" can apply to the plants or soils within the mesic habitat (i.e. mesic plants, mesic soils). Mesic habitats provide a moderate moisture content that remains relatively constant during crucial growing periods. A variety of outside factors contribute to the presence of water in the system, including streams and their offshoots, wet meadows, springs, seeps, irrigated fields, and high-elevation habitats. These factors effectively provide drought insurance during the growing season against climatic factors such as increasing temperatures, lack of rain, and the effects of urbanization. Other habitat types, such as m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comstock–Needham System
The Comstock–Needham system is a naming system for insect wing veins, devised by John Comstock and George Needham in 1898. It was an important step in showing the homology of all insect wings. This system was based on Needham's ''pretracheation theory'' that was later discredited by Frederic Charles Fraser in 1938. Vein terminology Longitudinal veins The Comstock and Needham system attributes different names to the veins on an insect's wing. From the anterior (leading) edge of the wing towards the posterior (rear), the major longitudinal veins are named: *''costa'' C, meaning ''rib'' *''subcosta'' Sc, meaning ''below the rib'' *''radius'' R, in analogy with a bone in the forearm, the radius In classical geometry, a radius (: radii or radiuses) of a circle or sphere is any of the line segments from its Centre (geometry), center to its perimeter, and in more modern usage, it is also their length. The radius of a regular polygon is th ... *''media'' M, meaning ''middle'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plecia Avus Handlirsch 1910 Fig22 Cropped
''Plecia'' is a genus of March flies (Bibionidae) comprising many species, both extant and fossilised. Species Extant species *'' P. acutirostris'' *'' P. adiastola'' *'' P. affinidecora'' *'' P. americana'' *'' P. amplipennis'' *'' P. aruensis'' *'' P. angularis'' *'' P. avicephaliforma'' *'' P. bicuspidata'' *'' P. bifida'' *'' P. bifoliolata'' *'' P. bisulca'' *'' P. boliviana'' *'' P. chinensis'' *'' P. crenula'' *'' P. curtispina'' *'' P. cuspidata'' *'' P. digitiformis'' *'' P. dileracabilis'' *'' P. dimidiata'' *'' P. duplicis'' *'' P. edwardsi'' *'' P. emeiensis'' *'' P. erebea'' *'' P. erebeoidea'' *'' P. forcipiformis'' *'' P. fulvicollis'' *'' P. hadrosoma'' *'' P. hamata'' *'' P. impilosa'' *'' P. intricata'' *'' P. javensis'' *'' P. lateralis'' *'' P. lieftincki'' *'' P. longifolia'' *'' P. longiforceps'' *'' P. lopesi'' *'' P. mandibuliformis'' *'' P. membranifera'' *'' P. multilobata'' *'' P. nagatomii'' *'' P. nearctic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cache Creek, British Columbia
Cache Creek is a historic transportation junction and incorporated village northeast of Vancouver in British Columbia, Canada. It is on the Trans-Canada Highway in the province of British Columbia at a junction with Highway 97. The same intersection and the town that grew around it was at the point on the Cariboo Wagon Road where a branch road, and previously only a trail, led east to Savona's Ferry on Kamloops Lake. This community is also the point at which a small stream, once known as Riviere de la Cache, joins the Bonaparte River.Akrigg, Helen B. and Akrigg, G.P.V; 1001 British Columbia Place Names; Discovery Press, Vancouver 1969, 1970, 1973, p. 35 The name is derived, apparently, from a ''cache'' or buried and hidden supply and trade goods depot used by the fur traders of either the Hudson's Bay Company or its rival the North West Company. Although it was first incorporated as a Local District municipality with the name Cache Creek in 1959, the name has been associ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smithers, British Columbia
Smithers is a town in northwestern British Columbia, approximately halfway between Prince George, British Columbia, Prince George and Prince Rupert, British Columbia, Prince Rupert. With a population of 5,378 in 2021, Smithers provides service coverage for most of the Bulkley Valley. History Region First Nations settlements existed thousands of years prior to European presence. Railway The planned Grand Trunk Pacific Railway (GTP) required two major divisional points in BC, where additional staff and facilities would be located. After Prince George, British Columbia, Prince George, various central points on the Prince Rupert leg were considered in the vicinity of Telkwa, Aldermere. A prime choice was Hubert, east of Telkwa, initially called Bulkley by the developers, who had amassed the surrounding land. These speculators promoted a future new city, and later a trade centre of the Bulkley Valley, both fallacious claims, since Smithers had already been selected as the divisional p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Driftwood Canyon Provincial Park
Driftwood Canyon Provincial Park is a provincial park in British Columbia, Canada. Driftwood Canyon Provincial Park covers of the Bulkley River Valley, on the east side of Driftwood Creek, a tributary of the Bulkley River, 10 km northeast of the town of Smithers. The park is accessible from Driftwood Road from Provincial Highway 16. It was created in 1967 by the donation of the land by the late Gordon Harvey (1913–1976) to protect fossil beds on the east side of Driftwood Creek. The beds were discovered around the beginning of the 20th century. The park lands are part of the asserted traditional territory of the Wet'suwet'en First Nation.Ludvigsen, R. 2001. The fossils at Driftwood Canyon provincial park: A management plan for BC Parks. Denman Institute for Research on Trilobites, 339 Denman Road, Denman Island, BC V0R 1T0 http://www.bvcentre.ca/files/External/FossilMgmtPlan-Ludvigsen2001.pdf (accessed July 14, 2011) Driftwood Canyon Provincial Park protects internat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Princeton, British Columbia
Princeton is a town municipality in the Similkameen Country, Similkameen region of southern British Columbia, Canada. The former mining and railway hub lies at the confluence of the Tulameen River, Tulameen into the Similkameen River, just east of the Canadian Cascades, Cascade Mountains. At the junction of British Columbia Highway 3, BC Highway 3 and British Columbia Highway 5A, 5A, the locality is by road about northwest of Keremeos, east of Hope, British Columbia, Hope, and south of Merritt, British Columbia, Merritt. First Nations and fur traders The First Nations in Canada, First Nations belong to the Interior Salish languages, Interior Salish of the Thompson language group. In 1812, Alexander Ross (fur trader), Alexander Ross of the Pacific Fur Company was the first European to explore the Similkameen River. About southwest of central Princeton are the ochre bluffs. Tulameen means "red earth" in the local language. This colour prompted the fur traders to call the river ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
