Etym.: The name probably refers to the areolate nature of the endoperidium.
Spore-sac up to 15 mm diam., globose-depressed. Exoperidium hyphal, the threads mixed with large sand grains closely appressed and cemented to the endoperidium. Endoperidium areolate due to the sand grains of the exoperidium, thick, fragile, ochraceous to whitish. Mouth tubular, plane, easily eroded and becoming indefinite. Socket more or less conspicuous, hardly at all separated from the stem, membrane invisible due to oclusion by soil. Gleba ferrugineous. Stem up to 30 x 5 mm, woody, covered by appressed soil, rugose-tuberculose, contorted or straight, when clean light brown with a slight orange hue.
Spores strongly coloured, subglobose to elliptic, asperulate or with small ribs arranged as meridians towards the apiculus, or verrucose under L.M., 4.2-6.8 µm diam; under SEM the ornamentation appears as large, blunt or conical, sparsely arranged verrucae. Capillitium hyaline, branched, septate; threads thick-walled, generally unevenly so, lumen scant to solid, not swollen at the scant, coloured, disjointable septa; 2.4-9 µm diam.
Habitat: in dark soil of volcanic origin.
