Biomeres are small extinction events and is defined by the migration of a group of trilobite, family Olenidae, which originally live in deep sea environment, to shallow sea region while the other trilobite groups and family die out.
Biomeres are small extinction events. Biomeres is defined by the migration of a group of trilobite. Trilobite is family Olenidae. Family Olenidae originally live in deep sea environment. This is trilobite. This is to shallow sea region. The other trilobite groups die out. Family die out.