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Ballooning can be dangerous (due to predators, and due to the unpredictable nature of long-distance ballooning, which may bring individuals to an unfavorable environment). It is observed in many species of spiders , such as Erigone atra , Cyclosa turbinata , as well as in spider mites ( Tetranychidae ) and in 31 species of lepidoptera ...
Spider behavior refers to the range of behaviors and activities performed by spiders. Spiders are air-breathing arthropods that have eight legs and chelicerae with fangs that inject venom . They are the largest order of arachnids and rank seventh in total species diversity among all other groups of organisms [ 1 ] which is reflected in their ...
Spider diversity [1] [105] [5] (numbers are approximate) Features Suborder/Infraorder Families Genera Species Segmented plates on top of abdomen [109] Ganglia in abdomen Spinnerets [109] Striking direction of fangs [13] Mesothelae: 2: 8: 169: Yes: Yes: Four pairs, in some species one pair fused, under middle of abdomen: Downwards and forwards ...
The diving bell spider or water spider (Argyroneta aquatica) is the only species of spider known to live almost entirely under water. It is the only member of the genus Argyroneta . [ 6 ] When out of the water, the spider ranges in colour from mid to dark brown, although the hairs on the abdomen give it a dark grey, velvet -like appearance. [ 7 ]
Euophrys omnisuperstes is a small spider, females having a total body length of about 5 mm (3 ⁄ 16 in), males being slightly smaller at about 4 mm (5 ⁄ 32 in) or less. Both sexes are generally dark brown in colour, with some paler and whitish hairs, and a metallic sheen on the head.
The genus was established in 1878 by German arachnologist Friedrich Karsch.The fringed jumping spider (Portia fimbriata) is the type species.[1]Molecular phylogeny, a technique that compares the DNA of organisms to construct the tree of life, indicates that Portia is a member of a basal clade (i.e. quite similar to the ancestors of all jumping spiders) and that the Spartaeus, Phaeacius, and ...
The spider was discovered in Madagascar in the Andasibe-Mantadia National Park in 2009. [4] Its silk is the toughest biological material ever studied. Its tensile strength is 1.6 GPa. [5] The species was named in honour of the naturalist Charles Darwin on November 24, 2009—precisely 150 years after the publication of The Origin of Species. [2]
Among the oldest known land arthropods are Trigonotarbids, members of an extinct order of spider-like arachnids. [5]Trigonotarbids share many superficial characteristics with spiders, including a terrestrial lifestyle, respiration through book lungs, and walking on eight legs, [6] with a pair of leg-like pedipalps near the mouth and mouth parts.