Mastigoproctus
Genus of whip scorpions
Mastigoproctus is a genus of whip scorpions, also called giant whip scorpion, giant vinegaroon, or grampus. Around 30 species have been described, some have a mature length of up to 9 centimetres (3.5 in) and can weigh over 30 grams (1.1 oz). Despite some popular beliefs, they are not dangerous to humans as are not venomous as they do not possess venom glands.