[1] The specimen was collected from the La Toca amber mine, northeast of Santiago de los Caballeros, in the Cordillera Septentrional area of the Dominican Republic.

It was first studied by Dr. George Poinar of the UC, Berkeley and Dr. Rolf Singer from the Field Museum of Natural History in Chicago, Illinois.

[2][4] With the 2007 publication of a fifth extinct agaric species, Palaeoagaracites antiquus the age for the order was pushed back to the Albian (approximately 100 Ma).

[5] The holotype of Coprinites is a lone fruiting body without any associated structures and a partly disarticulated stipe preserved in a piece of clear yellow amber approximately 9–6 millimetres (0.35–0.24 in) and weight 0.5 grams (0.018 oz).

[1] Coprinites was originally placed in the family Coprinaceae based on the visible structures, or macromorphology of the fruiting body and the microscopic features preserved in the amber specimen.