Leucocoprinus attinorum is a species of mushroom-producing fungus in the family Agaricaceae.

[1] It was described in 2023 by the mycologists Salomé Urrea‑Valencia, Rodolfo Bizarria Júnior, Pepijn W. Kooij, Quimi Vidaurre Montoya and Andre Rodrigues who conducted a study on fungal species cultivated by lower attine ants which described the new species Leucocoprinus attinorum and L. dunensis.

The movable stem ring is white with a dark brown margin of a similar colour to the cap centre.

Ellipsoid to amygdaliform with a rounded apex and germ pore covered with a hyaline cap.

[2] The specific epithet attinorum is named in reference to the subtribe Attina to which the Mycocepurus goeldii ants belong.