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.
Swelling can be compressed with a forefoot compression sleeve. The duration of time that it takes to heal a metatarsal stress fracture can vary. The most common metatarsal stress fracture found at the surgical neck of the metatarsal does tend to heal within 6-8 weeks. Metatarsal stress fractures at more proximal locations in the metatarsal tend to take longer to heal and can take up to 8-12 months become asymptomatic. It's not uncommon for runners to become frustrated due to the return of symptoms of a metatarsal stress fracture when increasing activity from walking to running.