Are earthworms mammals?

No. Worms are either in Phylum Annelida if they are segmented like earthworms, or Nematoda if they are roundworms like hookworms or heart worms that your dog can get, or Phylum Platyhelminthes if they are flatworms like tapeworms. Mammals all have hair, nurse their young with milk, have 4- chambered hearts, and nurture their young. read more

Earthworms are not mammals because they are not warmblooded. An earthworm isn't an insect either. read more

Several common earthworm species are mostly parthenogenetic, meaning that growth and development of embryos happens without fertilization. Among lumbricid earthworms, parthenogenesis arose from sexual relatives many times. Parthenogenesis in some Aporrectodea trapezoides lineages arose 6.4 to 1.1 million years ago from sexual ancestors. read more