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Ricinulei
Ricinulei is a small order of arachnids. Like most arachnids, they are predatory, eating small arthropods. They occur today in west-central Africa (''Ricinoides'') and the Neotropics (''Cryptocellus'' and ''Pseudocellus'') as far north as Texas. As of 2021, 91 extant species of ricinuleids have been described worldwide, all in the single family Ricinoididae. In older works they are sometimes referred to as Podogona. Due to their obscurity they do not have a proper common name, though in academic literature they are occasionally referred to as hooded tickspiders. In addition to the three living genera, there are fossil species from the upper Carboniferous of Euramerica and the Cretaceous Burmese amber. Description The most important general account of ricinuleid anatomy remains the 1904 monograph by Hans Jacob Hansen and William Sørensen. Useful further studies can be found in, e.g., the work of Pittard and Mitchell, Gerald Legg and L. van der Hammen. Body Ricinulei are typical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ricinulei From Fernandez & Giribet, Nymph Of Ricinoides Atewa (2015) (cropped)
Ricinulei is a small order of arachnids. Like most arachnids, they are predatory, eating small arthropods. They occur today in west-central Africa ('' Ricinoides'') and the Neotropics ('' Cryptocellus'' and '' Pseudocellus'') as far north as Texas. As of 2021, 91 extant species of ricinuleids have been described worldwide, all in the single family Ricinoididae. In older works they are sometimes referred to as Podogona. Due to their obscurity they do not have a proper common name, though in academic literature they are occasionally referred to as hooded tickspiders. In addition to the three living genera, there are fossil species from the upper Carboniferous of Euramerica and the Cretaceous Burmese amber. Description The most important general account of ricinuleid anatomy remains the 1904 monograph by Hans Jacob Hansen and William Sørensen. Useful further studies can be found in, e.g., the work of Pittard and Mitchell, Gerald Legg and L. van der Hammen. Body Ricinulei are ty ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ricinulei From Fernandez & Giribet, Male Ricinoides Karschii From Campo Reserve, Cameroon (2015) (cropped)
Ricinulei is a small order of arachnids. Like most arachnids, they are predatory, eating small arthropods. They occur today in west-central Africa ('' Ricinoides'') and the Neotropics ('' Cryptocellus'' and '' Pseudocellus'') as far north as Texas. As of 2021, 91 extant species of ricinuleids have been described worldwide, all in the single family Ricinoididae. In older works they are sometimes referred to as Podogona. Due to their obscurity they do not have a proper common name, though in academic literature they are occasionally referred to as hooded tickspiders. In addition to the three living genera, there are fossil species from the upper Carboniferous of Euramerica and the Cretaceous Burmese amber. Description The most important general account of ricinuleid anatomy remains the 1904 monograph by Hans Jacob Hansen and William Sørensen. Useful further studies can be found in, e.g., the work of Pittard and Mitchell, Gerald Legg and L. van der Hammen. Body Ricinulei are ty ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptocellus
''Cryptocellus'' is an arachnid genus in the order Ricinulei, first described by John Westwood in 1874. It is native to the Neotropics The Neotropical realm is one of the eight biogeographic realms constituting Earth's land surface. Physically, it includes the tropical terrestrial ecoregions of the Americas and the entire South American temperate zone. Definition In bioge .... Species it contains forty-five species: * '' Cryptocellus abaporu'' Bonaldo & Pinto-da-Rocha, 2003 — Brazil * '' Cryptocellus adisi'' Platnick, 1988 — Brazil * '' Cryptocellus albosquamatus'' Cooke, 1967 — Guyana * '' Cryptocellus becki'' Platnick & Shadab, 1977 — Brazil * '' Cryptocellus bocas'' Platnick & Shadab, 1981 — Panama * '' Cryptocellus bordoni'' (Dumitresco & Juvara-balş, 1977) — Venezuela * '' Cryptocellus brignolii'' Cokendolpher, 2000 — Suriname * '' Cryptocellus canga'' Pinto-da-Rocha & Andrade, 2012 — Brazil * '' Cryptocellus canutama'' Botero-Trujillo, Carvalh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudocellus
''Pseudocellus'' is an arachnid genus in the order Ricinulei, first described by Norman Platnick in 1980. It is native to the Neotropics. Species it contains forty-one species: * '' Pseudocellus abeli'' Armas, 2017 — Cuba * '' Pseudocellus alux'' Armas & Agreda, 2016 — Guatemala * '' Pseudocellus aridus'' Teruel, 2015 — Cuba * '' Pseudocellus bifer'' Teruel, 2018 — Cuba * '' Pseudocellus barberi'' (Ewing, 1929) — Guatemala, Honduras (nomen dubium) * '' Pseudocellus blesti'' (Merrett, 1960) — Panama * '' Pseudocellus bolivari'' Gertsch, 1971 — Mexico * '' Pseudocellus boneti'' (Bolívar y Pieltain, 1942) — Mexico * '' Pseudocellus chankin'' Valdez-Mondragón & Francke, 2011 — Mexico * '' Pseudocellus cookei'' (Gertsch, 1977) — Guatemala * '' Pseudocellus cruzlopezi'' Valdez-Mondragón & Francke, 2013 — Mexico * '' Pseudocellus cubanicus'' (Dumitresco & Juvara-balş, 1973) — Cuba * '' Pseudocellus dissimilior'' Teruel, 2018 — Cuba * '' Pseudocellus dissi ... [...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] |
Ricinoides
''Ricinoides'' is an arthropod genus in the family Ricinoididae, first described by Henry Ewing in 1929. Distribution Species in this genus are found in West Africa West Africa or Western Africa is the westernmost region of Africa. The United Nations defines Western Africa as the 16 countries of Benin, Burkina Faso, Cape Verde, The Gambia, Ghana, Guinea, Guinea-Bissau, Ivory Coast, Liberia, Mali, M .... Species it contains sixteen species: * '' Ricinoides afzelii'' (Thorell, 1892) — Ghana, Guinea, Sierra Leone * '' Ricinoides atewa'' Naskrecki, 2008 — Ghana * '' Ricinoides crassipalpe'' (Hansen & Sørensen, 1904) — Cameroon, Equatorial Guinea * '' Ricinoides eburneus'' Botero-Trujillo, Sain & Prendini, 2021 — Côte d’Ivoire * '' Ricinoides feae'' (Hansen, 1921) — Guinea, Guinea-Bissau * '' Ricinoides hanseni'' Legg, 1976 — Sierra Leone * '' Ricinoides iita'' Botero-Trujillo, Sain & Prendini, 2021 — Nigeria * '' Ricinoides kakum'' Botero-Trujillo, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burmese Amber
Burmese amber, also known as Burmite or Kachin amber, is amber from the Hukawng Valley in northern Myanmar. The amber is dated to around 100 million years ago, during the latest Albian to earliest Cenomanian ages of the mid-Cretaceous period. The amber is of significant palaeontological interest due to the diversity of flora and fauna contained as inclusions, particularly arthropods including insects and arachnids but also birds, lizards, snakes, frogs and fragmentary dinosaur remains. The amber has been known and commercially exploited since the first century AD, and has been known to science since the mid-nineteenth century. Research on the deposit has attracted controversy due to its alleged role in funding internal conflict in Myanmar and hazardous working conditions in the mines where it is collected. Geological context, depositional environment and age The amber is found within the Hukawng Basin, a large Cretaceous-Cenozoic sedimentary basin within northern Myanmar. The s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptocellus Goodnighti
''Cryptocellus goodnighti'' is an arachnid species in the genus ''Cryptocellus ''Cryptocellus'' is an arachnid genus in the order Ricinulei, first described by John Westwood in 1874. It is native to the Neotropics The Neotropical realm is one of the eight biogeographic realms constituting Earth's land surface. Physic ...''. It occurs in Costa Rica.On the female of Cryptocellus goodnighti Arachnida: Ricinulei. Norman I. Platnick, The Journal of Arachnology, 1993, Volume 21, no. 1, pages 79-80article Retrieved 26 March 2016 References External links * * Arthropods of Central America Ricinulei Animals described in 1981 {{Arachnid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pedipalp
Pedipalps (commonly shortened to palps or palpi) are the second pair of appendages of chelicerates – a group of arthropods including spiders, scorpions, horseshoe crabs, and sea spiders. The pedipalps are lateral to the chelicerae ("jaws") and anterior to the first pair of walking legs. Overview Pedipalps are composed of six segments or articles: the coxa, the trochanter, the femur, the short patella, the tibia, and the tarsus. In spiders, the coxae frequently have extensions called maxillae or gnathobases, which function as mouth parts with or without some contribution from the coxae of the anterior legs. The limbs themselves may be simple tactile organs outwardly resembling the legs, as in spiders, or chelate weapons ( pincers) of great size, as in scorpions. The pedipalps of Solifugae are covered in setae, but have not been studied in detail. Comparative studies of pedipalpal morphology may suggest that leg-like pedipalps are primitive in arachnids. At present, the ... [...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 (wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zoologische Verhandelingen
''Zoologische Verhandelingen'' was a Dutch scientific journal covering research in zoology. It was published between 1948 and 2002 by the Rijksmuseum van Natuurlijke Historie in Leiden Leiden (; in English and archaic Dutch also Leyden) is a city and municipality in the province of South Holland, Netherlands. The municipality of Leiden has a population of 119,713, but the city forms one densely connected agglomeration w .... All issues are available online. References Zoology journals Publications established in 1948 Publications disestablished in 2002 Defunct journals Multilingual journals {{zoo-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Appendage
An appendage (or outgrowth) is an external body part, or natural prolongation, that protrudes from an organism's body. In arthropods, an appendage refers to any of the homologous body parts that may extend from a body segment, including antennae, mouthparts (including mandibles, maxillae and maxillipeds), gills, locomotor legs (pereiopods for walking, and pleopods for swimming), sexual organs (gonopods), and parts of the tail (uropods). Typically, each body segment carries one pair of appendages. An appendage which is modified to assist in feeding is known as a maxilliped or gnathopod. In vertebrates, an appendage can refer to a locomotor part such as a tail, fins on a fish, limbs (legs, flippers or wings) on a tetrapod; exposed sex organ; defensive parts such as horns and antlers; or sensory organs such as auricles, proboscis (trunk and snout) and barbels. Appendages may become ''uniramous'', as in insects and centipedes, where each appendage comprises a s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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