There are 38 animal phyla, with most appearing in the fossil record during or after the Cambrian explosion. The most diverse groups are insects and mites. The majority of animals belong to nine phyla, with the rarest having only one or two species. No known phyla have gone extinct completely. According to the most widely […]
Fossils from the Ediacaran period, before the Cambrian, have been found, with over 100 different types of organisms dating back 600 million years. Some of these ancient forms are related to modern animals, including representatives of modern phyla. Only three modern phyla are mostly accepted by scientists as having existed in the Ediacaran period, but […]
