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Mastigoproctus giganteus
The giant vinegaroon is an arachnid in the family Thelyphonidae. This species is found in the American southwest and Mexico.
The vinegaroon is nocturnal and has poor vision. The whiplike tail is used as a sensory organ, as is the first pair of legs, which is not used for walking. Although its tail in unable to sting, this creature can spray an acidic mist from a scent gland at the base of the tail when disturbed. The spray is 85% concentrated acetic acid/vinegar, hence the common name "Vinegaroon." The heavy pinching mouthparts (modified pedipalps) can also inflict a painful bite. Although very unlikely to attack humans, it can certainly defend itself if provoked.
2 Comments
This was the first and only wild vinegaroon I've ever run across. I love the southwestern desert and would move there in a heartbeat if I could find work easily. The flora and fauna there are incredible.
Awesome!