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Palpigradi
Palpigrades, commonly known as microwhip scorpions, are arachnids belonging to the order Palpigradi. Description Palpigrades belong to the arachnid class. They are the sister group to Solifugae, no more than in length, and averaging . They have a thin, pale, segmented integument, and a segmented abdomen that terminates in a whip-like flagellum. This is made up of 15 segment-like parts, or "articles", and may make up as much as half the animal's length. Each article of the flagellum bears bristles, giving the whole flagellum the appearance of a bottle brush. The carapace is divided into two plates between the third and fourth leg pair of legs. They have no eyes. As in some other arachnids, the first pair of legs is modified to serve as sensory organs, and are held clear of the ground while walking. Often, however, palpigrades use their pedipalps for locomotion, so that the animal appears to be walking on five pairs of legs. But they do not swing in phase with the walking legs, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukoeneniidae
Palpigrades, commonly known as microwhip scorpions, are arachnids belonging to the order Palpigradi. Description Palpigrades belong to the arachnid class. They are the sister group to Solifugae, no more than in length, and averaging . They have a thin, pale, segmented integument, and a segmented abdomen that terminates in a whip-like flagellum. This is made up of 15 segment-like parts, or "articles", and may make up as much as half the animal's length. Each article of the flagellum bears bristles, giving the whole flagellum the appearance of a bottle brush. The carapace is divided into two plates between the third and fourth leg pair of legs. They have no eyes. As in some other arachnids, the first pair of legs is modified to serve as sensory organs, and are held clear of the ground while walking. Often, however, palpigrades use their pedipalps for locomotion, so that the animal appears to be walking on five pairs of legs. But they do not swing in phase with the walking legs, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arachnid
Arachnida () is a class of joint-legged invertebrate animals (arthropods), in the subphylum Chelicerata. Arachnida includes, among others, spiders, scorpions, ticks, mites, pseudoscorpions, harvestmen, camel spiders, whip spiders and vinegaroons. Almost all adult arachnids have eight legs, although the front pair of legs in some species has converted to a sensory function, while in other species, different appendages can grow large enough to take on the appearance of extra pairs of legs. The term is derived from the Greek word (''aráchnē'', 'spider'), from the myth of the hubristic human weaver Arachne, who was turned into a spider. Almost all extant arachnids are terrestrial, living mainly on land. However, some inhabit freshwater environments and, with the exception of the pelagic zone, marine environments as well. They comprise over 100,000 named species, of which 47,000 are species of spiders. Morphology Almost all adult arachnids have eight legs, unlike adult i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukoenenia Spelaea
''Eukoenenia'' is a genus of Eukoeneniid microwhip scorpions, first described by Carl Julius Bernhard Börner Carl Julius Bernhard Börner (28 May 1880 – 14 June 1953) was a German entomologist. Börner was born in Bremen and died in Naumburg. His collections of Collembola are located in the Natural History Museum, London and the Deutsches Entomolog ... in 1901. Species , the World Palpigradi Catalog accepts the following eighty-four species: * '' Eukoenenia amatei'' Mayoral & Barranco, 2017 – Spain * '' Eukoenenia angolensis'' (Rémy, 1956) – Angola * '' Eukoenenia angusta'' (Hansen, 1901) – India, Sri Lanka, Thailand * '' Eukoenenia ankaratrensis'' Rémy, 1960 – Madagascar * '' Eukoenenia antanosa'' (Rémy, 1950) – Madagascar * '' Eukoenenia audax'' Souza, Mayoral & Ferreira, 2020 – Brazil * '' Eukoenenia austriaca'' (Hansen, 1926) – Austria, Italy, Slovenia * '' Eukoenenia bara'' (Rémy, 1950) – Madagascar * '' Eukoenenia berlesei'' (Silvestri, 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prokoeneniidae
Prokoeneniidae is a family of microscorpions in the order Palpigradi. There are at least two genera and about seven described species in Prokoeneniidae. Genera * '' Prokoenenia'' Borner, 1901 * ''Triadokoenenia ''Triadokoenenia'' is a monotypic genus of Prokoeneniid microwhip scorpions, first described by Bruno Condé in 1991. Its single species, ''Triadokoenenia'' ''millotorum'' is distributed in Madagascar Madagascar (; mg, Madagasikara, ) ...'' Condé, 1991 References Further reading * * * Palpigradi Arachnid families {{arachnid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrokoenenia Yaksha
''Electrokoenenia yaksha'' is a Palpigrade that lived approximately 100 million years ago during the Cretaceous period. It is the first microwhip scorpion fossil from this period to be found and is currently the oldest known Palpigrade. The palpigrade was discovered in 2016 when a specimen was found in Cretaceous (Cenomanian) Burmese amber from the Hukawng Valley in northern Myanmar. It is long, and has a yellow coloring. References Palpigradi Prehistoric arachnid genera Cenomanian life Cretaceous animals of Asia † A dagger, obelisk, or obelus is a typographical mark that usually indicates a footnote if an asterisk has already been used. The symbol is also used to indicate death (of people) or extinction (of species). It is one of the modern descendan ... Fossils of Myanmar Burmese amber Fossil taxa described in 2016 Taxa named by Michael S. Engel {{paleo-arachnid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solifugae
Solifugae is an order of animals in the class Arachnida known variously as camel spiders, wind scorpions, sun spiders, or solifuges. The order includes more than 1,000 described species in about 147 genera. Despite the common names, they are neither true scorpions (order Scorpiones), nor true spiders (order Araneae). Most species of Solifugae live in dry climates and feed opportunistically on ground-dwelling arthropods and other small animals. The largest species grow to a length of , including legs. A number of urban legends exaggerate the size and speed of the Solifugae, and their potential danger to humans, which is negligible. Anatomy Solifuges are moderately small to large arachnids (a few millimeters to several centimeters in body length), with the larger species reaching in length, including legs. In practice, the respective lengths of the legs of various species differ drastically, so the resulting figures are often misleading. More practical measurements refer prim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxford University Press
Oxford University Press (OUP) is the university press of the University of Oxford. It is the largest university press in the world, and its printing history dates back to the 1480s. Having been officially granted the legal right to print books by decree in 1586, it is the second oldest university press after Cambridge University Press. It is a department of the University of Oxford and is governed by a group of 15 academics known as the Delegates of the Press, who are appointed by the vice-chancellor of the University of Oxford. The Delegates of the Press are led by the Secretary to the Delegates, who serves as OUP's chief executive and as its major representative on other university bodies. Oxford University Press has had a similar governance structure since the 17th century. The press is located on Walton Street, Oxford, opposite Somerville College, in the inner suburb of Jericho. For the last 500 years, OUP has primarily focused on the publication of pedagogical texts an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cuticle
A cuticle (), or cuticula, is any of a variety of tough but flexible, non-mineral outer coverings of an organism, or parts of an organism, that provide protection. Various types of "cuticle" are non- homologous, differing in their origin, structure, function, and chemical composition. Human anatomy In human anatomy, "cuticle" can refer to several structures, but it is used in general parlance, and even by medical professionals, to refer to the thickened layer of skin surrounding fingernails and toenails (the eponychium), and to refer to the superficial layer of overlapping cells covering the hair shaft ( cuticula pili), consisting of dead cells, that locks the hair into its follicle. It can also be used as a synonym for the epidermis, the outer layer of skin. Cuticle of invertebrates In zoology, the invertebrate cuticle or cuticula is a multi-layered structure outside the epidermis of many invertebrates, notably roundworms and arthropods, in which it forms an exoskeleto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyanobacteria
Cyanobacteria (), also known as Cyanophyta, are a phylum of gram-negative bacteria that obtain energy via photosynthesis. The name ''cyanobacteria'' refers to their color (), which similarly forms the basis of cyanobacteria's common name, blue-green algae, although they are not usually scientifically classified as algae. They appear to have originated in a freshwater or terrestrial environment. Sericytochromatia, the proposed name of the paraphyletic and most basal group, is the ancestor of both the non-photosynthetic group Melainabacteria and the photosynthetic cyanobacteria, also called Oxyphotobacteria. Cyanobacteria use photosynthetic pigments, such as carotenoids, phycobilins, and various forms of chlorophyll, which absorb energy from light. Unlike heterotrophic prokaryotes, cyanobacteria have internal membranes. These are flattened sacs called thylakoids where photosynthesis is performed. Phototrophic eukaryotes such as green plants perform photosynthesis in pl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sternite
The sternum (pl. "sterna") is the ventral portion of a segment of an arthropod thorax or abdomen. In insects, the sterna are usually single, large sclerites, and external. However, they can sometimes be divided in two or more, in which case the subunits are called sternites, and may also be modified on the terminal abdominal segments so as to form part of the functional genitalia, in which case they are frequently reduced in size and development, and may become internalized and/or membranous. For a detailed explanation of the terminology, see Kinorhynchs have tergal and sternal plates too, though seemingly not homologous with those of arthropods.Sørensen, M. V. et al. Phylogeny of Kinorhyncha based on morphology and two molecular loci. PLoS One 10, 1–33 (2015). Ventrites are externally visible sternites. Usually the first sternite is covered up, so that vertrite numbers do not correspond to sternid numbers. The term is also used in other arthropod groups such as crustac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal Of Arachnology
The American Arachnological Society (AAS) is a scientific organization founded in 1972 in order to promote the study of arachnids by seeking to achieve closer cooperation and understanding between amateur and professional arachnologists along with publication of the ''Journal of Arachnology.'' The society holds annual meetings around the United States and membership is open to all individuals who share the common objectives held by the society. Journal The AAS publishes the ''Journal of Arachnology''. Selected publications * See also * International Society of Arachnology The International Society of Arachnology (ISA) promotes the study of arachnids and the exchange of information among researchers in this field. It acts as an umbrella organisation for regional societies and individuals interested in spiders, and ... References External links AAS Constitution {{authority control Arachnological societies Environmental organizations based in Rhode Island Zoology organi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Onyx Marble
The Onyx Marble is a geologic formation in Arizona. It preserves fossils dating back to the Neogene period. See also * List of fossiliferous stratigraphic units in Arizona * Paleontology in Arizona Paleontology in Arizona refers to paleontological research occurring within or conducted by people from the U.S. state of Arizona. The fossil record of Arizona dates to the Precambrian. During the Precambrian, Arizona was home to a shallow sea wh ... References * Onyx stonecomprises different minerals, including quartz, feldspar, and agate. Neogene Arizona {{Neogene-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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