Mesothelae are a family of primitive spiders. Mesothelae spiders were big, like other bugs of the Carboniferous. Mesothelae would have acted like a modern trapdoor spider, by making a web underground and wait either for the prey to fall into the web, or if the prey goes too close to the entrance.
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| - Mesothelae are a family of primitive spiders. Mesothelae spiders were big, like other bugs of the Carboniferous. Mesothelae would have acted like a modern trapdoor spider, by making a web underground and wait either for the prey to fall into the web, or if the prey goes too close to the entrance.
- File:GorgonHead.png Mesothelae was a prehistoric animal shown in Walking with Monsters as giant spiders, able to hunt down animals as big as modern cats if they were alive today.
- This suborder is thought to form the sister group to all other living spiders. Recent Mesothelae are characterized by the narrow sternum on the ventral side of the prosoma. Several plesiomorphic characteristics may be useful in recognizing these spiders: there are tergite plates on the dorsal side and the almost-median position of the spinnerets on the ventral side of the opisthosoma. Although it has been claimed that they lack venom glands and ducts, which almost all other spiders feature,[1] subsequent works have demonstrated that at least some, possibly all, do in fact have both the glands and ducts.[2] All Mesothelae have eight spinnerets in four pairs. Like mygalomorph spiders, they have two pairs of book lungs.[3]
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| abstract
| - Mesothelae are a family of primitive spiders. Mesothelae spiders were big, like other bugs of the Carboniferous. Mesothelae would have acted like a modern trapdoor spider, by making a web underground and wait either for the prey to fall into the web, or if the prey goes too close to the entrance.
- File:GorgonHead.png Mesothelae was a prehistoric animal shown in Walking with Monsters as giant spiders, able to hunt down animals as big as modern cats if they were alive today.
- This suborder is thought to form the sister group to all other living spiders. Recent Mesothelae are characterized by the narrow sternum on the ventral side of the prosoma. Several plesiomorphic characteristics may be useful in recognizing these spiders: there are tergite plates on the dorsal side and the almost-median position of the spinnerets on the ventral side of the opisthosoma. Although it has been claimed that they lack venom glands and ducts, which almost all other spiders feature,[1] subsequent works have demonstrated that at least some, possibly all, do in fact have both the glands and ducts.[2] All Mesothelae have eight spinnerets in four pairs. Like mygalomorph spiders, they have two pairs of book lungs.[3] The Heptathelidae were once considered their own family; today they are considered a subfamily of the Liphistiidae (i.e. as Heptathelinae). Unlike all other extant mesothelians, heptathelines do not have fishing lines in front of the entrances to the burrows that they construct, making them more difficult to find. They also have a paired receptaculum (unpaired in other liphistiids), and have a conductor in their palpal organ. These long palps can confusingly look like an extra pair of legs, a mistake also made of some solifugids.
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