Images of E. udum (Pers.: Fr.) Laessøe & Spooner. are given on the left. A discussion on the genus can be found below.
* Laessøe, T., and B. M. Spooner. 1994. Rosellinia & Astrocystis (Xylariaceae): New species and generic concepts. Kew Bull. 49: 1-70.

This genus has the following characteristics:

stromatal tissue quantity: distributed only above perithecial layer
stromatal layers: unipartite
stromatal surface level: erumpent or superficial
stromatal interior: unknown
stromatal orange granules surrounding perithecia: absent
stromatal KOH pigments: absent
stromatal conidium-bearing discs: absent
stromatal bases: sessile and attached to substrate entirely
stromatal aggregation: not forming a crust
stromatal shapes: other than wiry
coremial pegs or remnants: absent
subiculum: absent
substrates: associated with substrates other than dung or insect nests
ascomatal number per stroma: mostly multiperitheciate
ascomatal ostioles: present
ascomatal configurations: not valsoid
ascomatal orientation: mostly oriented vertically
ascal apical rings: present
ascospore cell number: one-celled
ascospore shapes: other than cuboid
ascospore color: colored
ascospore ornamentation: smooth
ascospore germination site morphology: pore-like
perispore dehiscence: indehiscent
anamorphs: Geniculosporium-like
cultural gross morphology on oatmeal agar: not highly furrowed or distorted