1. Fig.3C, E, from the Gaojiashan biota. Fig. 3J, from the Kuanchuanpu biota. Description. Filaments are slightly sinuous, irregularly tangled in mesh-like masses, external diameter around 10-13 �m and wall thickness about 2 �m;A;Girvanella problematica Nicholson & Etheridge,1878
2. H�eg: 64, pl. 1, figs. 4-6. 1981 Girvanella problematica Nicholson;Etheridge; Bourque;Girvanella problematica Nicholson & Etheridge; Riding & Fan: 789, text-figure 3,1932