Petticoat Mottlegill

Panaeolus papilionaceus

''Panaeolus papilionaceus'', also known as ''Agaricus calosus'', ''Panaeolus campanulatus'', ''Panaeolus retirugis'', and ''Panaeolus sphinctrinus'', and commonly known as Petticoat mottlegill, is a very common and widely distributed little brown mushroom that feeds on dung.
Hoop petticoat mushroom - Panaeolus cf. papilionaceus Tentative ID Agaricales,Agaricomycetes,Basidiomycota,Bulgaria,Europe,Fall,Fungi,Fungus,Geotagged,Panaeolus papilionaceus,Sofia,Wildlife

Appearance

*Cap: 1 – 5 cm across, obtusely conic, grayish brown, not hygrophanous, becoming campanulate in age, margin adorned with white toothlike partial veil fragments when young, flesh thin.
⤷ Gills: adnate to adnexed close to crowded, one or two tiers of intermediate gills, pale gray, acquiring a mottled, blackish appearance in age, with whitish edges.
⤷ Spores: 12 - 18 x 7-10 µm, elliptical, smooth, with an apical pore, spore print black.
⤷ Stipe: 6 – 12 cm by 2 – 4 mm, gray-brown to reddish brown, darker where handled, paler toward the apex, fibrous and pruinose.
⤷ Odor: Mild.
⤷ Taste: Unappetizing.
⤷ Microscopic features: Basidia 4-sterigmate; abruptly clavate. Cheilocystidia abundant; subcylindric, often subcapitate or capitate.
Panaeolus papilionaceus (?) I'm not 100% sure of the ID - but I like the picture :-)  Fall,Geotagged,Israel,Panaeolus papilionaceus,Petticoat Mottlegill

Naming

This mushroom is the type species for the genus ''Panaeolus''.
Panaeolus papilionaceus This is a picture of Panaeolus papilionaceus at Morgan Run in Carroll County, Maryland. Geotagged,Panaeolus papilionaceus,Petticoat Mottlegill,Spring,United States

Habitat

Occurring singly, gregariously, or caespitosely on cow/horse dung, moose droppings, and in pastures. Widely distributed in North America in Spring, Summer, and Fall and through the Winter in warmer climates. It can be found in countries including Canada , the United States , the Caribbean , Chile, Colombia, Uruguay, France, The Netherlands, North Macedonia, Mexico, Norway, Slovenia, South Africa, Uganda, China, Iran, Lithuania, Kuwait, and the Philippines.

References:

Some text fragments are auto parsed from Wikipedia.

Taxonomy
KingdomFungi
DivisionBasidiomycota
ClassAgaricomycetes
OrderAgaricales
FamilyBolbitiaceae
GenusPanaeolus
SpeciesP. papilionaceus