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Langelurillus Horrifer
''Langelurillus horrifer'' is a species of jumping spider in the genus ''Langelurillus'' that lives in Guinea. The female was first described in 2002 by Christine Rollard and Wanda Wesołowska. The male has not been identified. It is a small brown spider with a carapace that measures in length and an abdomen that is typically long. It is distinguished from similar spiders, like '' Langelurillus difficilis'', by its complicated epigyne with its long spiralling seminal ducts. Taxonomy ''Langelurillus horrifer'' is a jumping spider that was first described by Christine Rollard and Wanda Wesołowska in 2002. It was one of over 500 species identified by the Polish arachnologist Wesołowska during her career. They allocated it to the genus ''Langelurillus'', which had been raised by Maciej Próchniewicz in 1994. The genus is related to ''Aelurillus'' and '' Langona'' but the spiders are smaller and, unlike these genera and '' Phlegra'', they lack the parallel stripes on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Langelurillus
''Langelurillus'' is a spider genus of the family Salticidae (jumping spiders). All the described species occur only in Africa. Species , the World Spider Catalog accepted the following species: *'' Langelurillus alboguttatus'' Wesolowska & Russell-Smith, 2000 – Tanzania *'' Langelurillus cedarbergensis'' Haddad & Wesolowska, 2013 – South Africa *'' Langelurillus furcatus'' Wesolowska & Russell-Smith, 2000 – Kenya, Tanzania *'' Langelurillus holmi'' Próchniewicz, 1994 – Kenya *'' Langelurillus horrifer'' Rollard & Wesolowska, 2002 – Guinea *'' Langelurillus ignorabilis'' Wesolowska & Cumming, 2008 – Zimbabwe *'' Langelurillus kenyaensis'' Dawidowicz & Wesolowska, 2016 – Kenya *'' Langelurillus krugeri'' Wesolowska & Haddad, 2013 – South Africa *'' Langelurillus lacteus'' Sanap, Joglekar & Caleb, 2017 – India *'' Langelurillus manifestus'' Wesolowska & Russell-Smith, 2000 – Tanzania *'' Langelurillus minutus'' Wesolowska & Cumming, 2011 – Namibia, Zimbabwe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clade (biology)
A clade (), also known as a monophyletic group or natural group, is a group of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree. Rather than the English term, the equivalent Latin term ''cladus'' (plural ''cladi'') is often used in taxonomical literature. The common ancestor may be an individual, a population, or a species (extinct or extant). Clades are nested, one in another, as each branch in turn splits into smaller branches. These splits reflect evolutionary history as populations diverged and evolved independently. Clades are termed monophyletic (Greek: "one clan") groups. Over the last few decades, the cladistic approach has revolutionized biological classification and revealed surprising evolutionary relationships among organisms. Increasingly, taxonomists try to avoid naming taxa that are not clades; that is, taxa that are not monophyletic. Some of the relationships between organis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spiders Described In 2002
Spiders (order Araneae) are air-breathing arthropods that have eight legs, chelicerae with fangs generally able to inject venom, and spinnerets that extrude silk. They are the largest order of arachnids and rank seventh in total species diversity among all orders of organisms. Spiders are found worldwide on every continent except for Antarctica, and have become established in nearly every land habitat. , 50,356 spider species in 132 families have been recorded by taxonomists. However, there has been debate among scientists about how families should be classified, with over 20 different classifications proposed since 1900. Anatomically, spiders (as with all arachnids) differ from other arthropods in that the usual body segments are fused into two tagmata, the cephalothorax or prosoma, and the opisthosoma, or abdomen, and joined by a small, cylindrical pedicel, however, as there is currently neither paleontological nor embryological evidence that spiders ever had ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salticidae
Jumping spiders are a group of spiders that constitute the family Salticidae. As of 2019, this family contained over 600 described genera and over 6,000 described species, making it the largest family of spiders at 13% of all species. Jumping spiders have some of the best vision among arthropods and use it in courtship, hunting, and navigation. Although they normally move unobtrusively and fairly slowly, most species are capable of very agile jumps, notably when hunting, but sometimes in response to sudden threats or crossing long gaps. Both their book lungs and tracheal system are well-developed, and they use both systems (bimodal breathing). Jumping spiders are generally recognized by their eye pattern. All jumping spiders have four pairs of eyes, with the anterior median pair being particularly large. Distinguishing characteristics Jumping spiders are among the easiest to distinguish from similar spider families because of the shape of the cephalothorax and their eye patt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fauna Of Guinea
The wildlife of Guinea is very diverse due to the wide variety of different habitats. The southern part of the country lies within Guinean Forests of West Africa Biodiversity Hotspot, while the north-east is characterized by dry savanna woodlands. Ecoregions of Guinea are Western Guinean lowland forest, Guinean montane forest, Guinean forest-savanna mosaic, West Sudanian Savanna, and Guinean mangroves. Declining populations of large mammals are restricted to uninhabited distant parts of parks and reserves, because of the inappropriate nature conservation. A noteworthy NGO specialized to nature conservation is the Guinean Parks. Famous strongholds of Guinean wildlife are Pinselly Classified Forest, National Park of Upper Niger, Badiar National Park, Mount Nimba Strict Nature Reserve, Ziama Massif, Bossou Hills Reserve, and Diécké Classified Forest. Fauna Mammals * African buffalo *African forest buffalo *African forest elephant *Bushbuck *Guinea baboon *Giant forest hog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Height Above Mean Sea Level
Height above mean sea level is a measure of the vertical distance (height, elevation or altitude) of a location in reference to a historic mean sea level taken as a vertical datum. In geodesy, it is formalized as ''orthometric heights''. The combination of unit of measurement and the physical quantity (height) is called "metres above mean sea level" in the metric system, while in United States customary and imperial units it would be called " feet above mean sea level". Mean sea levels are affected by climate change and other factors and change over time. For this and other reasons, recorded measurements of elevation above sea level at a reference time in history might differ from the actual elevation of a given location over sea level at a given moment. Uses Metres above sea level is the standard measurement of the elevation or altitude of: * Geographic locations such as towns, mountains and other landmarks. * The top of buildings and other structures. * Flying objects su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guinea Highlands
The Guinea Highlands is a densely forested mountainous plateau extending from central Guinea through northern Sierra Leone and Liberia to western Ivory Coast. The highlands include a number of mountains, ranges and plateaus, including the Fouta Djallon highlands in central Guinea, the Loma Mountains in Sierra Leone, the Simandou and Kourandou massifs in southeastern Guinea, the Nimba Range at the border of Guinea, Liberia, and Ivory Coast, and the Monts du Toura in western Ivory Coast. Geography In Guinea they are known as ''Dorsale Guinéenne''. The highest peak in the region is Mount Bintumani in Sierra Leone, at 1,945 metres (6,381 ft). Other peaks include Sankan Biriwa () in Sierra Leone and Mount Richard-Molard (Mount Nimba) () on the border of Guinea and Ivory Coast. The highlands mostly lie between above sea level. The Guinea Highlands are the source of many of West Africa's rivers, including the Niger River, West Africa's longest river, the Senegal and Gambia rive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holotype
A holotype is a single physical example (or illustration) of an organism, known to have been used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of several examples, but explicitly designated as the holotype. Under the International Code of Zoological Nomenclature (ICZN), a holotype is one of several kinds of name-bearing types. In the International Code of Nomenclature for algae, fungi, and plants (ICN) and ICZN, the definitions of types are similar in intent but not identical in terminology or underlying concept. For example, the holotype for the butterfly '' Plebejus idas longinus'' is a preserved specimen of that subspecies, held by the Museum of Comparative Zoology at Harvard University. In botany, an isotype is a duplicate of the holotype, where holotype and isotypes are often pieces from the same individual plant or samples from the same gathering. A holotype is not necessaril ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemism
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example ''Cytisus aeolicus'' is an endemite of the Italian flora. ''Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Langelurillus Nigritus
''Langelurillus'' is a spider genus of the family Salticidae (jumping spiders). All the described species occur only in Africa. Species , the World Spider Catalog accepted the following species: *'' Langelurillus alboguttatus'' Wesolowska & Russell-Smith, 2000 – Tanzania *'' Langelurillus cedarbergensis'' Haddad & Wesolowska, 2013 – South Africa *'' Langelurillus furcatus'' Wesolowska & Russell-Smith, 2000 – Kenya, Tanzania *'' Langelurillus holmi'' Próchniewicz, 1994 – Kenya *'' Langelurillus horrifer'' Rollard & Wesolowska, 2002 – Guinea *'' Langelurillus ignorabilis'' Wesolowska & Cumming, 2008 – Zimbabwe *'' Langelurillus kenyaensis'' Dawidowicz & Wesolowska, 2016 – Kenya *'' Langelurillus krugeri'' Wesolowska & Haddad, 2013 – South Africa *''Langelurillus lacteus'' Sanap, Joglekar & Caleb, 2017 – India *'' Langelurillus manifestus'' Wesolowska & Russell-Smith, 2000 – Tanzania *'' Langelurillus minutus'' Wesolowska & Cumming, 2011 – Namibia, Zimba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthropod Leg
The arthropod leg is a form of jointed appendage of arthropods, usually used for walking. Many of the terms used for arthropod leg segments (called podomeres) are of Latin origin, and may be confused with terms for bones: ''coxa'' (meaning hip, plural ''coxae''), ''trochanter'', ''femur'' (plural ''femora''), ''tibia'' (plural ''tibiae''), ''tarsus'' (plural ''tarsi''), ''ischium'' (plural ''ischia''), ''metatarsus'', ''carpus'', ''dactylus'' (meaning finger), ''patella'' (plural ''patellae''). Homologies of leg segments between groups are difficult to prove and are the source of much argument. Some authors posit up to eleven segments per leg for the most recent common ancestor of extant arthropods but modern arthropods have eight or fewer. It has been argued that the ancestral leg need not have been so complex, and that other events, such as successive loss of function of a ''Hox''-gene, could result in parallel gains of leg segments. In arthropods, each of the leg segments ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spinneret
A spinneret is a silk-spinning organ of a spider or the larva of an insect. Some adult insects also have spinnerets, such as those borne on the forelegs of Embioptera. Spinnerets are usually on the underside of a spider's opisthosoma, and are typically segmented. While most spiders have six spinnerets, some have two, four, or eight. They can move both independently and in concert. Most spinnerets are not simple structures with a single orifice producing a single thread, but complex structures of many microscopic spigots, each producing one filament. This produces the necessary orientation of the protein molecules, without which the silk would be weak and useless. Spigots can be singular or found in groups, which also permits spiders to combine multiple filaments in different ways to produce many kinds of silk for various purposes. Spinneret morphology can help arachnologists identify the taxon of a specimen and the specific morphology of a spigot can determine its use as well ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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