Ptinus bidens is a species of beetle commonly known as the "two-toothed spider beetle." It belongs to the family Ptinidae and is found in various parts of the world, including Europe, Asia, and North America. This small insect measures around 2-3 mm in length and has a distinctive body shape resembling a spider. It is known to infest stored food products, such as grains, cereals, and dried fruits, making it a common pest in households and food storage facilities.