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The Mesothelae are a suborder of spiders (order Araneae). As of April 2024 [update] , two extant families were accepted by the World Spider Catalog , Liphistiidae and Heptathelidae . Alternatively, the Heptathelidae can be treated as a subfamily of a more broadly circumscribed Liphistiidae.
Heptathelidae is a family of spiders. [1] It has been sunk within the family Liphistiidae as the subfamily Heptathelinae, [2] but as of April 2024 was accepted by the World Spider Catalog. [1] It is placed in suborder Mesothelae, which contains the most basal living spiders.
The family Liphistiidae was erected by Tamerlan Thorell in 1869 for the genus Liphistius.Initially, it was the only family placed in the suborder Mesothelae. In 1923, Kyukichi Kishida described a new genus, Heptathela, and suggested creating two tribes within the Liphistiidae corresponding to the genera Liphistius and Heptathela. [4]
These primitive spiders live in burrows with trapdoors at the entrance. These trapdoors are 3.3 cm wide and 2.5 cm long for females and the males' trapdoors are 2.0-2.3 cm wide and 1.5-1.8 cm long. The hinges of the trapdoor are located at the top and the bottom protrudes slightly.
Spiders in the suborder Mesothelae belong to the order Araneae (Spiders). ... Pages in category "Mesothelae" The following 2 pages are in this category, out of 2 ...
Heptathela kimurai, the Kimura spider, or kimura-gumo (in Japanese), is an Old World spider, found primarily in Japan and named after Arika Kimura, who collected it in 1920. It belongs to the sub-order Mesothelae (primitive burrowing spiders) and can reach up to 3 cm in length. Its burrows are covered by a camouflaged "pill box" flap.
Most of these early segmented fossil spiders from the Coal Measures of Europe and North America probably belonged to the Mesothelae, or something very similar, a group of spiders with the spinnerets placed underneath the middle of the abdomen, rather than at the end as in modern spiders. They were probably ground-dwelling predators, living in ...
This group of spiders comprises mostly heavy-bodied, stout-legged spiders including tarantulas, Australian funnel-web spiders, mouse spiders, and various families of spiders commonly called trapdoor spiders. Like the "primitive" suborder of spiders Mesothelae, they have two pairs of book lungs, and downward-pointing chelicerae. Because of this ...