A common fungus found on herbivore dung, especially rabbits. The dark, conical perithecia are up to 0.5mm tall with short agglutinated hairs

References: 
Doveri (2007) Fungi Fimicoli Italici
Ellis & Ellis (1998) Microfungi on Miscellaneous Substrates
Richardson & Watling (1997) Keys to Fungi on Dung