Protosteliomycetes/Protosteliales (ICBN) or Protostelea/Protostelia/Protosteliida[1] (ICZN) is a grouping of slime molds from the phylum Mycetozoa.[2][3] The name can vary depending upon the taxon used. Other names include Protostelea,[4] Protostelia,[5] and Protostelida.[6] When not implying a specific level of classification, the term protostelid or protosteloid amoeba is sometimes used.[7]
Protosteloid amoebae, also called protostelids, are amoebae that are capable of making simple fruiting bodies consisting of a cellular stalk topped by one or a few spores.[8] All species are microscopic and are typically found on dead plant matter where they consume bacteria, yeasts, and fungal spores. Since protostelids are amoebae that make spores, they are considered to be slime molds.[9]