Coprinopsis, P. Karst., 1881

Schünemann, Bárbara Letícia Botura, Westphalen, Mauro, Díazvalderrama, Jorge Ronny, Aguilar, Vilma & Silveira, Rosa Mara Borges Da, 2023, Coprinopsis (Psathyrellaceae, Agaricales) in the Neotropics: three new species and a new combination, Phytotaxa 585 (2), pp. 113-134 : 129-130

Key to identify Coprinopsis species from Brazil

1 Basidioma psathyrelloid, not deliquescent ................................................................................................. Coprinopsis myceniformis

Basidioma coprinoid, deliquescent ....................................................................................................................................................2

2 Pileus opened up to> 40mm...............................................................................................................................................................3

Pileus opened minor then < 40mm......................................................................................................................................................6

3 Veil adpressed squamulose or almost smooth ................................................................................................ Coprinopsis acuminata

Veil hairy-flocculose or breaking up in patches .................................................................................................................................4

4 Basidiospores <10µm length ..................................................................................................................... Coprinopsis atramentaria

Basidiospores>10µm length ..............................................................................................................................................................5

5 Veil elements elongated, sausage-like ................................................................................................................ Coprinopsis lagopus

Veil elements diverticulate .................................................................................................................................. Coprinopsis picacea

6 Veil in shaggy with pointed and fugacious scales ........................................................................................ Coprinopsis jamaicensis

Veil hairy-floccose or squamose ........................................................................................................................................................7

7 Annulus membranous....................................................................................................................................... Coprinopsis mexicana

Annulus absent ...................................................................................................................................................................................8

8 Basidiospores>8 um length ...............................................................................................................................................................9

Basidiospores <8 um length .............................................................................................................................................................15

9 Basidiospores with myxosporium ..................................................................................................................... Coprinopsis tuberosa

Basidiospores without myxosporium ...............................................................................................................................................10

10 Veil elements elongated, sausage-like ..............................................................................................................................................11

Veil elements diverticulate ...............................................................................................................................................................13

11 Veil elements yellowish....................................................................................................................... Coprinopsis brunneofibrillosa

Veil elements hyaline........................................................................................................................................................................12

12 Basidiospores <12um length ............................................................................................................................... Coprinopsis cinerea

Basidiospores> 12um length with parallel sides ................................................................................................ Coprinopsis radiata

13 Veil elements thick-walled ........................................................................................................................... Coprinopsis vermiculifer

Veil elements thin-walled .................................................................................................................................................................14

14 Basidiospores ellipsoid with apical papilla (“limoniform”) in frontal view .......................................................... Coprinopsis nivea

Basidiospores hexagonal in frontal view........................................................................................................ Coprinopsis cothurnata

15 Pleurocystidia present.......................................................................................................................................................................16

Pleurocystidia absent ........................................................................................................................................................................25

16 Habit caespitose................................................................................................................................................ Coprinopsis variegata

Habit solitary to fasciculate..............................................................................................................................................................17

17 Growing on dung..............................................................................................................................................................................18

Growing on grasses, wood or leaves ................................................................................................................................................20

18 Veil elements smooth................................................................................................................................ Coprinopsis pseudoradiata

Veils elements warty.........................................................................................................................................................................19

19 Basidiospores <4.5 µm breadth ........................................................................................................................ Coprinopsis stercorea

Basidiospores>4.5 µm breadth ........................................................................................................................ Coprinopsis foetidella

20 Veil elements elongated, sausage-like, thin-walled........................................................................................ Coprinopsis geesterani

Veil elements diverticulate, thin and thick-walled ...........................................................................................................................21

21 Basidiospores ovoid or rhomboid in frontal view ............................................................................................................................22

Basidiospores ellipsoid or lentiform in frontal view ........................................................................................................................23

22 Basidiospores <9 µm lenght ................................................................................................................................... Coprinopsis friesii

Basidiospores>9 µm lenght ......................................................................................................................... Coprinopsis austrofriesii

23 Veil elements thin walled, slightly incrusted.................................................................................................. Coprinopsis neotropica

Veil elements thin and thick walled, smooth....................................................................................................................................24

24 Growing on leaves................................................................................................................................................. Coprinopsis caesia

Growing on wood .................................................................................................................................................... Coprinopsis fulva

25 Cheilocystidia present ....................................................................................................................................... Coprinopsis floccosa

Cheilocystidia absent ....................................................................................................................................... Coprinopsis cortinata