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.
Metatarsalgia refers to pain at the ball of the foot, at the head of one or more metatarsal bones. It is basically a bruise of the bone or an inflammation of the soft tissue around the joint between a metatarsal and a toe bone(a metatarsophalangeal joint).he big toe drifts the opposite direction toward the 2nd toe. The bunion prominence is often caused by some enlargement of the head of the 1st metatarsal bone as well as the position of the 1st metatarsal bone as it protrudes from the side of the foot.