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 in the balls of the feet (the area between the toes and the arch). Metatarsalgia is often referred to as a symptom, rather than as a specific disease.ymptoms. Symptoms of metatarsalgia may include: 1  Pain in the ball of your foot â the part of the sole just behind your toes. 2  The pain may be sharp, aching or burning pain. 3  Pain that gets worse when you stand, walk or run and improves when you rest.