Fonticula

Trophic cells small, amoeboid with rounded body, from which elongated filopodia extend; flat discoid mitochondrial cristae; sorocarpic (“aggregative fruiting”) with stalked fruiting bodies formed by aggregation of amoebae; aggregated cells form a hollow gelatinous extracellular stalk supported by fibrillar matrix material; cells within stalk column encyst into walled spores that are forcibly pushed through the apex of stalk in an erupting fashion. Fonticula alba.