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.
1 A fracture of the first metatarsal bone can lead to later arthritis of the big toe joint. 2  A fracture at the base of the fifth metatarsal bone is often mistaken for an ankle sprain. 3  This would usually result in it not being rested or supported enough.he fifth metatarsal bone is the most common metatarsal bone to be fractured in sudden (acute) injury to the foot. It may be broken at various points along its length, depending on the mechanism of injury.