Spinellus fusiger

A mucoromycete that occurs parasitising small agarics, such as Mycena or Collybia, as well as on dung, with a mycelium forming slender, hyaline filamentous fructifications 1 to 4 cm long, terminating in a spherical to ellipsoidal head only 0.3 to 0.4 mm in diameter.

Sporangia initially white, turning black with sporulation.

Spores ellipsoidal to slightly fusiform, smooth-walled and moderately thickened, pale greenish-yellow under the microscope, 30 to 35 µm long, 12 to 17 µm wide, with abundant granular contents of small oil droplets inside.