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The Mygalomorphae, or mygalomorphs, are an infraorder of spiders, and comprise one of three major groups of living spiders with over 3,000 species, found on all continents except Antarctica. Many members are known as trapdoor spiders due to their creation of trapdoors over their burrows. Other prominent groups include Australian funnel web ...
White-tailed spiders. Yellow sac spider. Harvestman. Camel spiders. References. List of medically significant spider bites. Appearance. A number of spiders can cause spider bites that are medically important. Almost all spiders produce venom but only a few are classified as "venomous" and able to cause significant harm to humans. [ 1 ]
Actinopodidae, a family otherwise known as 'mouse-spiders', in South America and Australia. Antrodiaetidae, a family of 'folding trapdoor spiders' from the United States and Japan. Barychelidae, a family of 'brush-footed trapdoor spiders' with pantropical distribution. Ctenizidae, a family of ' cork -lid trapdoor spiders' in tropical and ...
Ctenizidae. Ctenizidae is a small family of mygalomorph spiders that construct burrows with a cork-like trapdoor made of soil, vegetation, and silk. They may be called trapdoor spiders, as are other, similar species, such as those of the families Liphistiidae, Barychelidae, and Cyrtaucheniidae, and some species in the Idiopidae and Nemesiidae.
Cyclocosmia ricketti (Chinese: 里氏盤腹蛛; pinyin: Lǐ shì pán fù zhū), commonly known as the Chinese hourglass spider (which generally refers to its genus), is a species of trapdoor spider of the genus Cyclocosmia, which refers specifically to mygalomorphus animals. Cyclocosmia ricketti is native to China and it was first described ...
Description. Wafer-lid spiders are generally large and range in color between light brown and black. Their eyes are placed in two rows, either in a rectangular position or with the back row wider apart. [4] They lack the thorn-like spines on tarsi and metatarsi I and II (the two outermost leg segments) found in true trapdoor spiders (Ctenizidae).
Missulena bradleyi. Though they resemble most genera of the infraorder Mygalomorphae, they can be easily distinguished by the large pair of chelicerae, as well as by the placement of two small eyes in the centre of the head and three at each side, whereas in all other trapdoor spiders the eyes are grouped in a mound at the centre of the head.
Most spiders in this family build trapdoor burrows. For example, the 20 millimetres (0.79 in) long Sipalolasma builds its burrow in rotted wood, with a hinged trapdoor at each end. The 10 millimetres (0.39 in) long Idioctis builds its burrow approximately 5 centimetres (2.0 in) deep, just below the high tide level, sealing the opening with a ...