Organic Framing

Origin and Evolution of Earthworm

Origine and Evolution of Earthworm

• No such scientific information on origin and evolution of earthworm because of their soft body and decay quickly. So fossils are not found.
• However,
  • 1. Stepheson (1930) – stated that earthworm originated in around 120 m years ago, after origin of dicot plants.
  • Others – Earthworm originated prior to origin of dicots, i.e., 570 m years agro.
• Clitellum: Glandular portion of epidermis associated with cocoon production (cocoon – nothing but eggs or cases). It indicates sexual maturity.

Vermiculture: Only culture of earthworm and multiplication.

Vermicomposting: Management of earthworm to produce compost.