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Steatoda Paykulliana
''Steatoda paykulliana'' is a species of false black widow spider in the tangle-web spiders family, native to the Mediterranean countries, Southern Europe and Western Asia. The species is named in honor of the Swedish naturalist Gustaf von Paykull (1757–1826). Description As is evident from one of the common names associated with Steatoda species, false widow, ''S. paykulliana'' resembles black widow spiders in shape and color markings. The female ''S. paykulliana'' body length is from 8 mm, to 12 mm when pregnant. The abdomen is globular, colored a shiny black, with two non-overlapping stripes, one dorsal and one lateral. This differentiates it from true black widow spiders that have dorsal and ventral markings. The stripes are ivory-yellow on young females and orange-red on mature ones. The male is only about half the size of the female, with less prominent markings. ''S. paykulliana's'' venom is much less potent than the true black widows', and its effect on hu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Athanase Walckenaer
Baron Charles Athanase Walckenaer (25 December 1771 – 28 April 1852) was a French civil servant and scientist. Biography Walckenaer was born in Paris and studied at the universities of Oxford and Glasgow. In 1793 he was appointed head of the military transports in the Pyrenees, after which he pursued technical studies at the École Nationale des Ponts et Chaussées and the École polytechnique. He was elected member of the Institut de France in 1813, was mayor (''maire'') in the 5th arrondissement in Paris and secretary-general of the prefect of the Seine 1816–1825. He was made a baron in 1823. In 1839 he was appointed conservator for the Department of Maps at the Royal Library in Paris and in 1840 secretary for life in the Académie des Inscriptions et Belles Lettres. He was one of the founders of the Société entomologique de France in 1832, and a "resident member" of the Société des observateurs de l'homme. Walckenaer introduced the full biography according ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steatoda
The spider genus ''Steatoda'', in the family Theridiidae, includes about 120 recognized species, distributed around the world (including many cosmopolitan species which are found among human populations worldwide). One common name is cupboard spider, for many species build their webs in dark, sheltered, undisturbed places around the house or garden, in sheds and garages, under garden furniture, compost bins, and the like. Signs of the cupboard spider include small white spots of spider droppings, like small splashes of paint, on the floor underneath the web. Many spiders of the genus ''Steatoda'' are often mistaken for widow spiders (''Latrodectus''), and are known as false widows. They are closely related (in the family Theridiidae) but ''Steatoda'' are significantly less harmful to humans. Not all ''Steatoda'' species resemble black widows – they come in many different colors and sizes, mostly smaller than ''Latrodectus'' species. ''Steatoda paykulliana'' can grow larger than ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theridiidae
Theridiidae, also known as the tangle-web spiders, cobweb spiders and comb-footed spiders, is a large family of Araneomorphae, araneomorph spiders first described by Carl Jakob Sundevall in 1833. This diverse, globally distributed family includes over 3,000 species in 124 genus, genera, and is the most common arthropod found in human dwellings throughout the world. Theridiid spiders are both Entelegynae, entelegyne, meaning that the females have a genital plate, and Cribellum, ecribellate, meaning that they spin sticky capture silk instead of woolly silk. They have a comb of serrated bristles (setae) on the Arthropod leg, tarsus of the fourth leg. The family includes some model organisms for research, including the List of medically significant spider bites, medically important Latrodectus, widow spiders. They are important to studies characterizing their venom and its clinical manifestation, but widow spiders are also used in research on spider silk and sexual biology, including ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gustaf Von Paykull
Gustav von Paykull (21 August 1757 – 28 January 1826) was a Swedish'' friherre'' (circa baron) and Marshal of the Court, ornithologist, and entomologist. He was a member of the Royal Swedish Academy from 1791 and a founder of the natural history museum (Naturhistoriska Riksmuseet) in Stockholm, through his 1819 donation of his extensive zoological collections to the academy (now in the Swedish Museum of Natural History). He was elected a member of the American Philosophical Society in 1801 and a Foreign Honorary Member of the American Academy of Arts and Sciences in 1804. Publications His best-known publications are: *''Monographia Histeroidum''. Upsaliae : Palmblad iv 114 pp. (1811). *''Fauna Suecica''. Insecta, Coleoptera. Upsala : Edman 3 volumes. (3 volumes, 1798, 1799, 1800) Species named in his honor * The red false black widow spider, ''Steatoda paykulliana'' * The pantropical jumping spider, ''Plexippus paykulli'' * The band-bellied crake, ''Porzana paykullii'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Widow Spider
''Latrodectus'' is a broadly distributed genus of spiders with several species that are commonly known as the true widows. This group is composed of those often loosely called black widow spiders, brown widow spiders, and similar spiders. However, the diversity of species is much greater. A member of the family Theridiidae, this genus contains 34 species, which include several North American "black widows" (southern black widow ''Latrodectus mactans'', western black widow '' Latrodectus hesperus'', and northern black widow ''Latrodectus variolus''). Besides these, North America also has the red widow '' Latrodectus bishopi'' and the brown widow '' Latrodectus geometricus'', which, in addition to North America, has a much wider geographic distribution. Elsewhere, others include the European black widow (''Latrodectus tredecimguttatus''), the Australian redback black widow (''Latrodectus hasseltii'') and the closely related New Zealand katipō (''Latrodectus katipo''), several d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Venom
Venom or zootoxin is a type of toxin produced by an animal that is actively delivered through a wound by means of a bite, sting, or similar action. The toxin is delivered through a specially evolved ''venom apparatus'', such as fangs or a stinger, in a process called envenomation. Venom is often distinguished from poison, which is a toxin that is passively delivered by being ingested, inhaled, or absorbed through the skin, and toxungen, which is actively transferred to the external surface of another animal via a physical delivery mechanism. Venom has evolved in terrestrial and marine environments and in a wide variety of animals: both predators and prey, and both vertebrates and invertebrates. Venoms kill through the action of at least four major classes of toxin, namely necrotoxins and cytotoxins, which kill cells; neurotoxins, which affect nervous systems; myotoxins, which damage muscles; and haemotoxins, which disrupt blood clotting. Venomous animals cause tens ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wasp
A wasp is any insect of the narrow-waisted suborder Apocrita of the order Hymenoptera which is neither a bee nor an ant; this excludes the broad-waisted sawflies (Symphyta), which look somewhat like wasps, but are in a separate suborder. The wasps do not constitute a clade, a complete natural group with a single ancestor, as bees and ants are deeply nested within the wasps, having evolved from wasp ancestors. Wasps that are members of the clade Aculeata can Stinger, sting their prey. The most commonly known wasps, such as yellowjackets and hornets, are in the family Vespidae and are Eusociality, eusocial, living together in a nest with an egg-laying queen and non-reproducing workers. Eusociality is favoured by the unusual haplodiploid system of sex-determination system, sex determination in Hymenoptera, as it makes sisters exceptionally closely related to each other. However, the majority of wasp species are solitary, with each adult female living and breeding independently ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steatoda Paykulliana
''Steatoda paykulliana'' is a species of false black widow spider in the tangle-web spiders family, native to the Mediterranean countries, Southern Europe and Western Asia. The species is named in honor of the Swedish naturalist Gustaf von Paykull (1757–1826). Description As is evident from one of the common names associated with Steatoda species, false widow, ''S. paykulliana'' resembles black widow spiders in shape and color markings. The female ''S. paykulliana'' body length is from 8 mm, to 12 mm when pregnant. The abdomen is globular, colored a shiny black, with two non-overlapping stripes, one dorsal and one lateral. This differentiates it from true black widow spiders that have dorsal and ventral markings. The stripes are ivory-yellow on young females and orange-red on mature ones. The male is only about half the size of the female, with less prominent markings. ''S. paykulliana's'' venom is much less potent than the true black widows', and its effect on hu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Insect
Insects (from Latin ') are pancrustacean hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (head, thorax and abdomen), three pairs of jointed legs, compound eyes and one pair of antennae. Their blood is not totally contained in vessels; some circulates in an open cavity known as the haemocoel. Insects are the most diverse group of animals; they include more than a million described species and represent more than half of all known living organisms. The total number of extant species is estimated at between six and ten million; In: potentially over 90% of the animal life forms on Earth are insects. Insects may be found in nearly all environments, although only a small number of species reside in the oceans, which are dominated by another arthropod group, crustaceans, which recent research has indicated insects are nested within. Nearly all insects hatch from eggs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthropod
Arthropods (, (gen. ποδός)) are invertebrate animals with an exoskeleton, a Segmentation (biology), segmented body, and paired jointed appendages. Arthropods form the phylum Arthropoda. They are distinguished by their jointed limbs and Arthropod cuticle, cuticle made of chitin, often Mineralization (biology), mineralised with calcium carbonate. The arthropod body plan consists of segments, each with a pair of appendages. Arthropods are bilaterally symmetrical and their body possesses an exoskeleton, external skeleton. In order to keep growing, they must go through stages of moulting, a process by which they shed their exoskeleton to reveal a new one. Some species have wings. They are an extremely diverse group, with up to 10 million species. The haemocoel, an arthropod's internal cavity, through which its haemolymph – analogue of blood – circulates, accommodates its interior Organ (anatomy), organs; it has an open circulatory system. Like their exteriors, the internal or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lizard
Lizards are a widespread group of squamate reptiles, with over 7,000 species, ranging across all continents except Antarctica, as well as most oceanic island chains. The group is paraphyletic since it excludes the snakes and Amphisbaenia although some lizards are more closely related to these two excluded groups than they are to other lizards. Lizards range in size from chameleons and geckos a few centimeters long to the 3-meter-long Komodo dragon. Most lizards are quadrupedal, running with a strong side-to-side motion. Some lineages (known as " legless lizards"), have secondarily lost their legs, and have long snake-like bodies. Some such as the forest-dwelling '' Draco'' lizards are able to glide. They are often territorial, the males fighting off other males and signalling, often with bright colours, to attract mates and to intimidate rivals. Lizards are mainly carnivorous, often being sit-and-wait predators; many smaller species eat insects, while the Komodo eats mamma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spider
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 a sep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
