Deconica is a genus of small mushroom-forming fungi. Index Fungorum confirms Deconica (W.G. Sm.) P. Karst., 1879, as a legitimate genus name (Index Fungorum). It came back into use when DNA showed that the old genus Psilocybe was two lineages, and a 2007 proposal assigned the name to the non-bluing group (Norvell, 2009).
No Deconica species is known to produce psilocybin or psilocin (Bradshaw et al., 2022). The paperwork still lags: the same 2022 review estimated that 52 species probably belonging in Deconica were still classified in Psilocybe. Transfers happen species by species, as when a non-bluing Thai species, Psilocybe deconicoides, was moved into Deconica in 2012 (Guzmán et al., 2012).
On 25 October 2026 GBIF listed 49 accepted species in Deconica (GBIF). A 2024 genome study found that 14 of 71 fungarium specimens it sequenced, many filed as Psilocybe, were in fact Deconica (Bradshaw et al., 2024). This is why totals taken straight from a name database mix the two genera.
Sources
- Norvell, 2009, Mycotaxon 110
- Bradshaw et al., 2022, Applied and Environmental Microbiology
- Guzmán et al., 2012, Mycotaxon 119
- GBIF species API: Deconica
Last checked .