The thalloid body of a slime mould (myxomycetes) is known as:

The thalloid body of Myxomycetes is called plasmodium. It is a multinucleate diploid body which propagates through fission or thickwalled cysts or sclerotium-like structures. Fruiting bodies and mycelium are absent in lower fungi. Protenoma is not formed in fungi, but in bryophytes (sporophyte). Related Theory The members of Myxomycetes are called slime moulds because they contain and secrete slime. They are included in lower fungi. Their somatic phase is a multinucleate, diploid holocarpic Plasmodium (a product of syngamy). Reproduction takes place by the formation of uninucleate, thick-walled resting spores which are produced within minute fruiting bodies like structures i.e., the sporangia, however, the true fruiting bodies are absent in slime moulds.