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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.
Spiders have developed several different respiratory anatomies, based on book lungs, a tracheal system, or both. Mygalomorph and Mesothelae spiders have two pairs of book lungs filled with haemolymph, where openings on the ventral surface of the abdomen allow air to enter and diffuse oxygen.
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.
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 ...
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]
This spider makes up for its tiny size with a dazzling costume, and it's no surprise that it's called the "sequined" or. At first glance, it looks like a tiny piece of jewelry or stained glass ...
Spiders in the suborder Mesothelae belong to the order Araneae (Spiders). Subcategories. This category has the following 3 subcategories, out of 3 total. G.
One group of spiders that is fairly active this time of year that breaks this stereotype are the wolf spiders. More Nature News: Owls usher in the Halloween spirit with 'who-cooks-for-you' call