Scorpion
Videos
Scorpions are predatory arachnids with eight legs, a pair of grasping pincers and a narrow, segmented tail, often carried in a characteristic forward curve over the back and always ending with a sting
Fossil of Palaeophonus nuncius, a Silurian scorpion from Sweden
Ventral view: the pectines have a comblike structure in an inverted V shape.
Stinger of an Arizona bark scorpion
Insect
Videos
Insects are hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body, three pairs of jointed legs, co
Insect: Six legs, three-part body (head, thorax, abdomen), up to two pairs of wings
Spider: eight legs, two-part body
Woodlouse: seven pairs of legs, seven body segments (plus head and tail)