Campanella austrochilensis Singer, Beih.

Honan, Amy H., Desjardin, Dennis E., Perry, Brian A., Horak, Egon & Baroni, Timothy J., 2015, Towards a better understanding of Tetrapyrgos (Basidiomycota, Agaricales): new species, type studies, and phylogenetic inferences, Phytotaxa 231 (2), pp. 101-132 : 123

Campanella austrochilensis Singer, Beih. Nova Hedwigia 29: 86. 1969.

Synonyms: Pterospora austrochilensis (Singer) E. Horak, Sydowia 36: 131. 1983.

Tetrapyrgos austrochilensis (Singer) E. Horak, Sydowia 39: 102. 1987 [1986].

Holotype:— CHILE. Llanquihue Prov. : Peulla, 20 March 1959, R Singer M 1948 (reported to be in LIL).

The type specimen is unavailable at LIL (lost?); description of material known only from the original diagnosis. Description from protologue: Basidiomes relatively small with white, pustulate pileus, a reticulate-lamellate white hymenophore, and stipe absent or a small pseudostipe. Basidiospores 5.5–7.5 × 4.8–6.2 μm, triangular with a rounded lateral bulge, thin-walled. Cheilocystidia 50–55 × 6.8–14 μm, ventricose-capitate with a capitulum 6.8–14 μm diam. Pileipellis a Rameales -structure of diverticulate, clamped hyphae. No mention is made of gelatinized tissues, nor of diverticula on the cheilocystidia.

Status: Without data on the gelatinization of pileus tissues and more details on basidiospore shape, it is impossible to determine if the species is best placed in Campanella (as intended by Singer 1969) or Tetrapyrgos (as designated by Horak 1987). The strongly reticulate-anastomosing hymenophore in combination with a pseudostipe and cheilocystidia lacking central diverticula suggest that it is best accepted in Campanella .