Bonin Islands Ink Cap (Coprinus boninensis)  

This species is known from a single locality on the island of Chichijima in the Ogasawara group, Japan, where it was growing on decaying herbs.

The species is considered extinct. [1]

*********************  

References:  

[1] Kentaro Hosaka; Takahito Kobayashi; Michael A. Castellano; Takamichi Orihara: The status of voucher specimens of mushroom spwcies thought to be extinct from Japan. Bulletin of the National Museum of Nature and Science Ser. B 44(2): 53-66. 2018

*********************  

edited: 31.08.2020