As mentioned above, rDNA sequence data have revealed that the taxa most closely related to Chaetomella and Pilidium are Sphaerographium enuirostrum and Synchaetomella lunatospora. Sphaerographium tenuirostrum is a pycnidial fungus recently described from decaying petals of Camellia sasanqua in New Zealand (VERKLEY 2001). Although the pycnidia of S. tenuirostrum are rostrate and have a circular opening rather than a raphe, the walls are thickened up to 70 µm similar to those of Chaetomella and Pilidium. Like Pilidium, species of Sphaerographium lack any setae or hairs. Sphaerographium is also similar to Chaetomella and Pilidium in having filiform, branched conidiophores that line the base and sides of the pycnidium and acropleurogenous phialidic conidiogenous cells. The conidia of Sphaerographium are falcate, hyaline, one-septate in S. tenuirostrum, one to four septate in the type species, S. squarrosum, and non-septate in S. petiolicola (VERKLEY 2002). Sphaerographium tenuirostrum is the only species in that genus for which a living culture and sequence data exist. No teleomorph is known for any of the three accepted species of Sphaerographium. However, based on their similarity to Corniculariella Karst., Foveostroma DiCosmo and Topospora Fr., VERKLEY (2002) speculated that these eustromatic coelomycetes would have teleomorphs in the inoperculate discomycetes especially the families Dermateaceae and Helotiaceae.