猛蛛亚目 Mygalomorphae
（重定向自Orthognatha）
![](/Images/godic/202501/31/Mouse_spider5410.jpg")
![Sphodros rufipes](/Images/godic/202501/31/Sphodros_rufipes5410.JPG")
![](/Images/godic/202501/31/PlatycryptusUndatusFemale5410.jpg")
猛蛛亚目（Mygalomorphae，也称：Orthognatha），即原蛛亚目，是蜘蛛目下的一个亚目，属于地位未定的Opisthothelae。毒牙相对新蛛亚目来说，其区别在于毒牙为平行状。 其下生物的寿命可达25年。
Orthognatha
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Mygalomorphae 猛蛛亚目
（重定向自Orthognatha）
![Chelicerae of a black wishbone spider (Nemesiidae)](/Images/godic/202501/31/Black_Wishbone5410.jpg")
The Mygalomorphae or mygalomorphs are an infraorder of spiders. The name is derived from the Greek mugalē, meaning "shrew", plus morphē meaning form or shape. An older name for the group is Orthognatha, derived from the orientation of the fangs which point straight down and do not cross each other (as they do in the araneomorphs).
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