These cocoons have an incubation period of about 14- 18 days after which they hatch to release juveniles (Figure 4.7). ... ↑ Earthworm Wikipedia. The second stage is the hatchling. Life cycle . The first stage is the coccoon. February 10, 2016.Unknown author. Asked in Earthworms How long have earthworms been around? Worms can produce anywhere between 3 and 80 cocoons each year and can continue to produce cocoons as … Anecic -produce deep vertical burrows, slow to reproduce, not appropriate for composting 2. The Circle of Life. An earthworm's life cycle is very long. Life Cycle. 1. Related Questions. Worms in Lumbricus are hermaphrodites, meaning they have both male and female reproductive parts. Two worms mating. They can all be placed into 3 categories that are useful for composting. There are 5,500 known species of earthworms in 21 families.They are found everywhere, except in polar or dry climates. What is the life cycle of an earthworm? Their sizes vary: they can be between two centimeters and about three meters in length. Top Answer. There are over 3000 individual species of earthworms. At about 6 weeks old, the worm will begin to grow the clitellum about 2/3 down the body where it will contain both reproductive organs. earthworms were the third form of life… The third stage is the full size earthworm. The eggs are held in a protective cocoon. Web. Once earthworms have reached adulthood – which can can be at four to six weeks – they’re mature enough to reproduce and the cycle begins all over. Wiki User September 03, 2011 11:03AM. An earthworm is an invertebrate animal with a long, stretchy body and no legs.It is a type of annelid.. Lampito mauritii begins its life cycle, from the fertilized eggs.