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 (Pain in the ball of the foot). Note: Metatarsalgia is not an injury; itâs actually a symptom or a group of symptoms. These may include pain in the ball of the foot, with or without bruising, and inflamation. Metatarsalgia can have a number of causes and, as a result, a number of treatments.What to look for: Localized pain in the ball of the foot, on the bottom of the foot, in the area of the sole of the foot just before the toes.Metatarsalgia, the scientific name for this problem, is a painful but common occurrence.ne of the hallmarks of this disorder is pain in the ball of the foot during weight-bearing activities (running, walking, standing, etc.). Sharp or shooting pains in the toes also may be present, and pain in the toes and/or ball of the foot may increase when the toes are flexed.