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The Agelenidae are a large family of spiders in the suborder Araneomorphae.Well-known examples include the common "grass spiders" of the genus Agelenopsis.Nearly all Agelenidae are harmless to humans, but the bite of the hobo spider (Eratigena agrestis) may be medically significant, and some evidence suggests it might cause necrotic lesions, [1] but the matter remains subject to debate. [2]
Stiphidiidae, also called sheetweb spiders, is a family of araneomorph spiders first described in 1917. [1] Most species are medium size (Stiphidion facetum is about 8 millimetres (0.31 in) long) and speckled brown with long legs. All members of this family occur in New Zealand and Australia except for Asmea. [2]
The size of webs can vary significantly. Some species build sheet webs with mainsheets of up to one square metre, [4] while some species (e.g. Cambridgea quadromaculata) do not build webs at all. [12] Those Cambridgea that do build webs run along the underside of the mainsheet rather than along the top as some sheet-web spiders do (e.g ...
An example is found in frogs—aside from a brief period during the few weeks after metamorphosis, frogs grow isometrically. [12] Therefore, a frog whose legs are as long as its body will retain that relationship throughout its life, even if the frog itself increases in size tremendously. Isometric scaling is governed by the square–cube law ...
The movements of the frog do not stimulate the host tarantulas to attack and there is an unknown chemical present in the frog's skin that acts as a cue to the tarantulas that this species is not prey. [9] The spiders did attempt to catch and eat five species of frogs from the families Bufonidae, Hylidae, and Leptodactylidae. It is noted that ...
The term "isometric" comes from the Greek for "equal measure", reflecting that the scale along each axis of the projection is the same (unlike some other forms of graphical projection). An isometric view of an object can be obtained by choosing the viewing direction such that the angles between the projections of the x , y , and z axes are all ...
Erigoninae are the most numerous of the sheet weavers, with more than 2,000 described species. Many species live in leaf litter and build minute sheet webs. [1] These spiders probably are more important as members of the beneficial complex of predators in agroecosystems than is generally known. [2]
Dwarf sheet spiders (Hahniidae) is a family of araneomorph spiders, first described by Philipp Bertkau in 1878. [1] Description.