In a few cases, amber has preserved spiders' egg sacs and webs, occasionally with prey attached; the oldest fossil web found so far is 100 million years old. Earlier spider fossils come from a few lagerstÃ¤tten, places where conditions were exceptionally suited to preserving fairly soft tissues.
Definition of METATARSAL. : of, relating to, or being the part of the human foot or of the hind foot in quadrupeds between the tarsus and the phalanges that in humans comprises five elongated bones which form the front of the instep and ball of the foot. See metatarsal defined for kids.ADVERTISEMENT. of, relating to, or being the part of the human foot or of the hind foot in quadrupeds between the tarsus and the phalanges that in humans comprises five elongated bones which form the front of the instep and ball of the foot. See metatarsal defined for kids. ADVERTISEMENT.
Metatarsal fracture (acute) - aftercare. The metatarsal bones are the long bones in your foot that connect your ankle to your toes. They also help you balance when you stand and walk. A sudden blow or severe twist of your foot, or overuse, can cause a break, or acute (sudden) fracture, in one of the bones. There are five metatarsal bones in your foot. The 5th metatarsal is the outer bone that connects to your little toe. It is the most commonly fractured metatarsal bone. A break in the part of your 5th metatarsal bone closest to the ankle is called a Jones fracture. This area of the bone has low blood flow. This makes healing difficult. An avulsion fracture occurs when a tendon pulls a piece of bone away from the rest of the bone.