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Eresus Walckenaeri
''Eresus walckenaerius'' is a species of ladybird spider from the eastern Mediterranean. Description While males are very similar to those of ''Eresus sandaliatus'' or ''Eresus cinnaberinus'' the females are up to 4 cm long. The females often have a red band on their opisthosoma. Adult males can be found from April to June.Bellmann, H. (1997). Kosmos-Atlas Spinnentiere Europas. ''Kosmos''. Habits Their strikingly pink webs are built below rocks. One egg sac contains several hundred eggs, and spiderlings seem to disperse much more than other ''Eresus'' species (using ballooning), so that they are not found in large clusters. Distribution This species is found on the southern Balkans, in southern Italy, in Turkey and on islands of the Aegean Sea. Name The species name is in honor of 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 stu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaspard Auguste Brullé
Gaspard Auguste Brullé (7 April, 1809 – 21 January, 1873) was a French entomologist. Passionate about insects from a young age and through the intervention of Georges Cuvier, he participated in the Morea expedition organised by Jean Baptiste Bory de Saint-Vincent in 1829. In 1832, he participated in the foundation of the Société entomologique de France. The following year he became an aide-naturaliste (assistant naturalist) to Jean Victoire Audouin in charge of Crustacea, Arachnida and insects. Brullé studied for and obtained a baccalauréat in sciences then in "lettres", before qualifying in 1839 as a Doctor of Natural Science. His thesis, published in 1837, was ''Sur le gisement des insectes fossiles et sur les services que l'étude de ces animaux peut fournir à la géologie''. He became the Professor of Zoology and Comparative Anatomy at the University of Dijon. He proposed a new classification of Neuroptera which was completed by Wilhelm Ferdinand Erichson. He ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ladybird Spider
''Eresus'', also called ladybird spiders, is a genus of velvet spiders that was first described by Charles Athanase Walckenaer in 1805. Members of the genus formerly called ''Eresus cinnaberinus'' or ''Eresus niger'' are now placed in one of three species: ''Eresus kollari'', ''Eresus sandaliatus'' and '' Eresus moravicus''. Description They resemble both jumping spiders and the spiders in the Palpimanidae, as their bodies look similar, and are as well rather velvety. Males of this genus have a red abdomen, with black spotting, usually taking the form of 4 black spots. While the rest of the body is usually black, with some reddish areas or white areas. Females of this genus are duly colored usually being a grey, brown or black color. Some species having some yellow coloration, thought they are still significantly duller then the males. Identification Males of this genus can usually be distinguished by their unique abdominal pattern. Which in the lateral areas has two pairs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eresus Sandaliatus
''Eresus sandaliatus'' is a species of spider found primarily in northern and central Europe. Like other species of the genus ''Eresus'', it is commonly called ladybird spider because of the coloration of the male. ''E. sandaliatus'' is one of the three species into which ''Eresus cinnaberinus'' or ''Eresus niger'' has been divided. Description Male ''E. sandaliatus'' are generally (a little bit smaller than other species of the ''E. cinnaberinus'' complex) and characterized by a bright orange back featuring four large and two small ebony spots. White hairs are never present on the back, and legs always lack red hairs. In contrast, the females are and jet-black. Habits Males enter the adult stage in early September, but overwinter in their webs and search for females only in May or June of the next year. Otherwise, this species is very similar to other species of ''E. cinnaberinus'' complex. After the 35-80 eggs hatch, the spiderlings receive a liquid from the mouth of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eresus Cinnaberinus
''Eresus cinnaberinus'' and ''Eresus niger'' are names formerly used for a group of spiders in the genus '' Eresus'' now divided into three species, '' E. kollari'', '' E. sandaliatus'' and '' E. moravicus''. The three species differ in size, colour pattern, shape of prosoma and copulatory organs, and habitat, with no morphologically intermediate forms. As eastern and western ''E. kollari'' are genetically different, with the eastern form likely a hybrid between "pure" ''E. kollari'' and ''E. moravicus'', it is possible that later revisions will partition it into additional species. Both ''Eresus cinnaberinus'' and ''Eresus niger'' are now regarded as '' nomina dubia''. Distributions * ''E. kollari'' has the widest distribution of the three species, occurring from Spain and Portugal to Novosibirsk in Russia. * ''E. moravicus'' occurs in the Pannonian region, the Balkan Peninsula and parts of the Austrian Alps The Central Eastern Alps (german: Zentralalpen or Zentrale Ostalpe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Opisthosoma
The opisthosoma is the posterior part of the body in some arthropods, behind the prosoma (cephalothorax). It is a distinctive feature of the subphylum Chelicerata (arachnids, horseshoe crabs and others). Although it is similar in most respects to an abdomen (and is often referred to as such), the opisthosoma is differentiated by its inclusion of the respiratory organs (book lungs or book gills) and the heart. Segments The number of segments and appendages on the opisthosoma vary. Scorpions have 13, but the first is only seen during its embryological development. Other arachnids have fewer; harvestmen, for instance, have only ten. In general, appendages are absent or reduced, although in horseshoe crabs they persist as large plate-like limbs, called opercula or branchiophores, bearing the book gills, and that function in locomotion and gas exchange. In most chelicerates the opisthosomal limbs are greatly reduced and persist only as specialized structures, such as the silk-producing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ballooning (spider)
Ballooning, sometimes called kiting, is a process by which spiders, and some other small invertebrates, move through the air by releasing one or more gossamer threads to catch the wind, causing them to become airborne at the mercy of air currents and electric fields. A 2018 study concluded that electric fields provide enough force to lift spiders in the air, and possibly elicit ballooning behavior. This is primarily used by spiderlings to disperse; however, larger individuals have been observed doing so as well. The spider climbs to a high point and takes a stance with its abdomen to the sky, releasing fine silk threads from its spinneret until it becomes aloft. Journeys achieved vary from a few metres to hundreds of kilometres. Even atmospheric samples collected from balloons at five kilometres altitude and ships mid-ocean have reported spider landings. Ballooning can be dangerous (due to predators, and due to the unpredictable nature of long-distance ballooning, which may brin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Balkans
The Balkans ( ), also known as the Balkan Peninsula, is a geographical area in southeastern Europe with various geographical and historical definitions. The region takes its name from the Balkan Mountains that stretch throughout the whole of Bulgaria. The Balkan Peninsula is bordered by the Adriatic Sea in the northwest, the Ionian Sea in the southwest, the Aegean Sea in the south, the Turkish Straits in the east, and the Black Sea in the northeast. The northern border of the peninsula is variously defined. The highest point of the Balkans is Mount Musala, , in the Rila mountain range, Bulgaria. The concept of the Balkan Peninsula was created by the German geographer August Zeune in 1808, who mistakenly considered the Balkan Mountains the dominant mountain system of Southeast Europe spanning from the Adriatic Sea to the Black Sea. The term ''Balkan Peninsula'' was a synonym for Rumelia in the 19th century, the European provinces of the Ottoman Empire. It had a ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aegean Sea
The Aegean Sea ; tr, Ege Denizi (Greek language, Greek: Αιγαίο Πέλαγος: "Egéo Pélagos", Turkish language, Turkish: "Ege Denizi" or "Adalar Denizi") is an elongated embayment of the Mediterranean Sea between Europe and Asia. It is located between the Balkans and Anatolia, and covers an area of some 215,000 square kilometres. In the north, the Aegean is connected to the Marmara Sea and the Black Sea by the straits of the Dardanelles and the Bosphorus. The Aegean Islands are located within the sea and some bound it on its southern periphery, including Crete and Rhodes. The sea reaches a maximum depth of 2,639m to the west of Karpathos. The Thracian Sea and the Sea of Crete are main subdivisions of the Aegean Sea. The Aegean Islands can be divided into several island groups, including the Dodecanese, the Cyclades, the Sporades, the Saronic Islands, Saronic islands and the North Aegean islands, North Aegean Islands, as well as Crete and its surrounding islands. The ... [...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 University of Oxford, Oxford and University of Glasgow, 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 of Paris, 5th arrondissement in Paris and secretary-general of the prefect of the Seine (département), Seine 1816–1825. He was made a baron in 1823. In 1839 he was appointed conservator for the Department of Maps at the Bibliothèque Nationale, 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 "r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eresidae
Velvet spiders (family Eresidae) are a small group (about 130 species in 9 genera) of spiders almost entirely limited to the Old World, with exception of a few species known from Brazil. In Europe some are commonly called the ladybird spiders Description This family can sometimes be confused with the jumping spiders, or those in the Palpimanidae family. These spiders are usually black or brown in color, thought they can also have brighter colors as pictured. As their common name implies they can look quite smooth and velvety. They usually live in silken tubes under objects, or underground, but the genus ''Stegodyphus,'' builds silken nests. Identification They can be distinguished from most species except the Penestomidae by their semi rectangular carapace and clypeal hood. Thought the can be distinguished from Penestomidae by the eye arrangement, straight anterior eye row and strongly recurved posterior eye row, with the median eyes close together. Social Behavior ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spiders Of Asia
Spiders (order (biology), order Araneae) are air-breathing arthropods that have eight legs, chelicerae with fangs generally able to inject venom, and spinnerets that extrude spider silk, silk. They are the largest order of arachnids and rank seventh in total species diversity among all Order (biology), 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 Family (biology), families have been recorded by Taxonomy (biology), 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 segmentation (biology), segments are fused into two Tagma (biology), tagmata, the cephalothorax or prosoma, and the opisthosoma, or abdomen, and joined by a small, cylindrical Gl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spiders Of Europe
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 separate t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
