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Psalmopoeus
Psalmopoeus is a genus of the family ''Theraphosidae'' containing various species of tarantulas. The genus is native to Trinidad and Tobago, Colombia, Ecuador, Venezuela, Guyana, Brazil, Belize, Panama, Nicaragua, Costa Rica, Mexico, Guatemala and Honduras. All of these tarantulas are arboreal in nature, '' Psalmopoeus victori'' being the first arboreal tarantula of Mexico. Venom These species are believed to be relatively venomous, and research in the venom of '' P. cambridgei'' shows it to be similar to capsaicin, the molecule causing irritation in chilli peppers.Anitei, Stefan (2006). Chili Peppers, as Strong as Tarantula Venom.' Science. These molecules activate sensory cells to send pain signals to the brain. Genetic engineers are working on blocking the receptors that are activated by these molecules. Diagnosis The species of this genus can be distinguished from all others by the lyriform organ in the prolateral maxillae, composed of a singular row of thick ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Psalmopoeus Irminia
''Psalmopoeus irminia'', also known as the Venezuelan suntiger, is a species of tarantula endemic to Venezuela, Guyana and Brazil. Description ''Psalmopoeus irminia'' are unique in their striking black coloration paired with vibrant orange chevron and leg markings. This species can be very defensive when disturbed, yet also has the ability to accelerate from danger very quickly. Like other ''Psalmopoeus'', this species can often be found in tree cavities at a medium height. Females reach six inches in diagonal leg span on average. Males are Sexual dimorphism, sexually dimorphic, appearing to have much thinner legs as well losing most of their coloration, it can be hard to distinguish them from ''Psalmopoeus cambridgei'' mature males. Like all members of ''Psalmopoeus'' , ''Ps. irminia'' lack urticating hairs. Eggsacs of this species typically carry 50-200 spiderlings, however, they have the ability to lay two eggsacs from a single mating. References {{Taxonbar, fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Psalmopoeus Cambridgei
''Psalmopoeus cambridgei'', the Trinidad chevron tarantula, is a species of spider in the family Theraphosidae, endemic to Trinidad. Its venom is the source of psalmotoxin and vanillotoxin which are classified as inhibitor cystine knot proteins. Psalmotoxin may be of therapeutic use in patients with a stroke. Description The female has chevron-shaped dark markings on the abdomen and her color varies through shades of green and brown with characteristic red or orange flashes on the legs. The mature male is sexually dimorphic, colored a more uniform grey or brown, the body appearing smaller in comparison to the diagonal leg span, reaching five inches (12 cm) on average. Males can reach maturity in as little as one year. The female is very large and fast-growing, reaching seven inches (18 cm) in leg span. It feeds readily and makes an attractive display animal, being fairly active when given correct housing conditions. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Psalmopoeus Victori
''Psalmopoeus victori'', the Mexican half & half or Darth Maul tarantula, is a species of tarantula endemic to the moist forests of Veracruz, Mexico, although the exact location is withheld to protect from illegal collection. Description This species is easily distinguished from other members of the genus ''Psalmopoeus'' by its unique coloration, that is having vibrant red on the backside (abdomen and legs III & IV) and dark coloration on the front legs, along with a green carapace, females reach roughly 6.5 inches by diagonal leg span. ''P. victori'' is sexually dimorphic, with males appearing much more slender, legs matching the green coloration of the carapace, and red abdomen. Like other species in the genus ''Psalmopoeus'', the species lacks urticating hairs. This species is extremely reclusive, when searching at night, the time tarantulas are most active, it can still prove difficult to observe any specimen. When they are found, it is usually in tree cavities at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chelicerae
The chelicerae () are the mouthparts of the subphylum Chelicerata, an arthropod group that includes arachnids, horseshoe crabs, and sea spiders. Commonly referred to as "jaws", chelicerae may be shaped as either articulated fangs, or similarly to pincers. Some chelicerae, such as those found on nearly all spiders, are hollow and contain (or are connected to) venom glands, and are used to inject venom into prey or a perceived threat. In ''Pisaurina mira'', also known as the nursery web spider, the chelicerae are utilized to snatch the prey once it becomes within reach, facilitating the "sit-and-wait ambush predator" behavior. Both pseudoscorpions and harvestmen have structures on their chelicerae that are used for grooming (papillae in pseudoscorpions, cheliceral teeth in Opiliones). Types Chelicerae can be divided into three kinds: jackknife chelicerae, scissor chelicerae, and 3-segmented chelate chelicerae. Jackknife chelicerae The jackknife chelicera is subchelate (with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Capsaicin
Capsaicin (8-methyl-''N''-vanillyl-6-nonenamide) ( or ) is an active component of chili peppers, which are plants belonging to the genus ''Capsicum''. It is a chemical irritant for mammals, including humans, and produces a sensation of burning in any tissue with which it comes into contact. Capsaicin and several related alkaloids are called capsaicinoids and are produced as secondary metabolites by chili peppers, probably as deterrents against certain mammals and fungi.What Made Chili Peppers So Spicy? Talk of the Nation, 15 August 2008. Pure capsaicin is a , colorless, highly |
Tarantula
Tarantulas comprise a group of large and often hairy spiders of the family Theraphosidae. , 1,040 species have been identified, with 156 genera. The term "tarantula" is usually used to describe members of the family Theraphosidae, although many other members of the same infraorder (Mygalomorphae) are commonly referred to as "tarantulas" or "false tarantulas". Some of the more common species have become popular in the exotic pet trade. Many New World species kept as pets have setae known as urticating hairs that can cause irritation to the skin, and in extreme cases, cause damage to the eyes. Overview Like all arthropods, the tarantula is an invertebrate that relies on an exoskeleton for muscular support.Pomeroy, R. (2014, February 4). Pub. Real Clear Science, "Spiders, and Their Amazing Hydraulic Legs and Genitalia". Retrieved October 13, 2019, from https://www.realclearscience.com/blog/2013/02/spiders-their-amazing-hydraulic-legs-and-genitals.html. Like other Arachnida, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theraphosidae
Tarantulas comprise a group of large and often hairy spiders of the family Theraphosidae. , 1,040 species have been identified, with 156 genera. The term "tarantula" is usually used to describe members of the family Theraphosidae, although many other members of the same infraorder (Mygalomorphae) are commonly referred to as "tarantulas" or "false tarantulas". Some of the more common species have become popular in the exotic pet trade. Many New World species kept as pets have setae known as urticating hairs that can cause irritation to the skin, and in extreme cases, cause damage to the eyes. Overview Like all arthropods, the tarantula is an invertebrate that relies on an exoskeleton for muscular support.Pomeroy, R. (2014, February 4). Pub. Real Clear Science, "Spiders, and Their Amazing Hydraulic Legs and Genitalia". Retrieved October 13, 2019, from https://www.realclearscience.com/blog/2013/02/spiders-their-amazing-hydraulic-legs-and-genitals.html. Like other Arachnida, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genetic Engineers
Genetic engineering, also called genetic modification or genetic manipulation, is the modification and manipulation of an organism's genes using technology. It is a set of technologies used to change the genetic makeup of cells, including the transfer of genes within and across species boundaries to produce improved or novel organisms. New DNA is obtained by either isolating and copying the genetic material of interest using recombinant DNA methods or by artificially synthesising the DNA. A construct is usually created and used to insert this DNA into the host organism. The first recombinant DNA molecule was made by Paul Berg in 1972 by combining DNA from the monkey virus SV40 with the lambda virus. As well as inserting genes, the process can be used to remove, or " knock out", genes. The new DNA can be inserted randomly, or targeted to a specific part of the genome. An organism that is generated through genetic engineering is considered to be genetically modified (GM ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Costa Rica
Costa Rica (, ; ; literally "Rich Coast"), officially the Republic of Costa Rica ( es, República de Costa Rica), is a country in the Central American region of North America, bordered by Nicaragua to the north, the Caribbean Sea to the northeast, Panama to the southeast, the Pacific Ocean to the southwest, and Maritime boundary, maritime border with Ecuador to the south of Cocos Island. It has a population of around five million in a land area of . An estimated 333,980 people live in the capital and largest city, San José, Costa Rica, San José, with around two million people in the surrounding metropolitan area. The sovereign state is a Unitary state, unitary Presidential system, presidential Constitution of Costa Rica, constitutional republic. It has a long-standing and stable democracy and a highly educated workforce. The country spends roughly 6.9% of its budget (2016) on education, compared to a global average of 4.4%. Its economy, once heavily dependent on agricultu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chilli Peppers
Chili peppers (also chile, chile pepper, chilli pepper, or chilli), from Nahuatl ''Aztec cuisine, chīlli'' (), are varieties of the fruit#Berries, berry-fruit of plants from the genus ''Capsicum'', which are members of the nightshade family Solanaceae, cultivated for their pungency. Chili peppers are widely used in many cuisines as a spice to add "heat" to dishes. Capsaicin and related compounds known as Capsaicin#Capsaicinoids, capsaicinoids are the substances giving chili peppers their intensity when ingested or topical application, applied topically. While ''chili peppers'' are (to varying degrees) pungent or "spicy", there are other varieties of capsicum such as bell peppers (UK: peppers) which generally provide additional sweetness and flavor to a meal rather than “heat.” Chili peppers are believed to have originated somewhere in Central America, Central or South America. and were first cultivated in Mexico. After the Columbian Exchange, many cultivars of chili peppe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irritation
Irritation, in biology and physiology, is a state of inflammation or painful reaction to allergy or cell-lining damage. A stimulus or agent which induces the state of irritation is an irritant. Irritants are typically thought of as chemical agents (for example phenol and capsaicin) but mechanical, thermal (heat), and radiative stimuli (for example ultraviolet light or ionising radiations) can also be irritants. Irritation also has non-clinical usages referring to bothersome physical or psychological pain or discomfort. Irritation can also be induced by some allergic response due to exposure of some allergens for example contact dermatitis, irritation of mucosal membranes and pruritus. Mucosal membrane is the most common site of irritation because it contains secretory glands that release mucous which attracts the allergens due to its sticky nature. Chronic irritation is a medical term signifying that afflictive health conditions have been present for a while. There are many dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slit Sensilla
The slit sensilla, also known as the slit sense organ, is a small mechanoreceptory organ or group of organs in the exoskeleton of arachnids which detects physical deformation or strain due to forces experienced by the animal. The organ appears in the vast majority of discovered arachnids, and is "remarkably consistent" in location and direction within each order. The arachnid slit sensilla corresponds to the campaniform sensilla found in insects. Slit sensilla tend to be widely distributed over the arachnid's exoskeleton, but have also been found to be grouped at specific locations and in a bundle of parallel lines; the latter distribution is referred to as a "lyriform organ". The term "lyriform organ" comes from the shape of such grouped slit sensilla, which resembles a lyre. Arachnids with lyriform slit sensilla are commonly used as experimental subjects for investigations into mechanosensation because the almost 2D structure of their slit sensilla allows for relatively simple u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
