Discovery of the closest free-living relative of the domesticated “magic mushroom” Psilocybe cubensis in Africa
OpenAlex – December 07, 2024
Source: OpenAlex
Summary
The beloved "magic mushroom," *Psilocybe cubensis*, originated in Africa, diverging from its newly identified wild relative, *P. ochraceocentrata*, around 1.5 million years ago. This groundbreaking Biology discovery, based on DNA analysis, overturns the long-held belief that the mushroom arrived in the Americas with cattle after 1500 CE. Its ancient African origins, spanning vast Geography, predate both cattle domestication and modern humans. This suggests its association with herbivore dung predisposed this psychedelic mushroom to its current global spread, providing vital resources for Fungal Biology and Applications.
Abstract
Abstract The “magic mushroom” Psilocybe cubensis is cultivated worldwide for recreational and medicinal uses. Described initially from Cuba in 1904, there has been substantial debate about its origin and diversification. The prevailing view, first proposed by the Psilocybe expert Gastón Guzmán in 1983, is that P. cubensis was inadvertently introduced to the Americas when cattle were introduced to the continents from Africa and Europe (∼1500 CE), but that its progenitor was endemic to Africa. This hypothesis has never been tested. Here, we report the discovery of the closest wild relative of P. cubensis from sub-Saharan Africa, P. ochraceocentrata nom. prov. Using DNA sequences from type specimens of all known and accessable African species of Psilocybe , multi-locus phylogenetic and molecular clock analysis strongly support recognizing the African samples as a new species that last shared a common ancestor with P. cubensis ∼1.5 million years ago (∼710k - 2.55M years ago 95% HPD). Even at the latest estimated time of divergence, this long predates cattle domestication and the origin of modern humans. Both species are associated with herbivore dung, suggesting this habit likely predisposed P. cubensis to its present specialization on domesticated cattle dung. Ecological niche modeling using bioclimatic variables for global records of these species indicates historical presence across Africa, Asia, and the Americas over the last 3 million years. This discovery sheds light on the wild origins of domesticated P. cubensis and provides new genetic resources for research on psychedelic mushrooms.