Xylomelasma shoalensis A. N. Mill., Y. Marín & Stchigel, Sydowia 68: 224. 2016.

Specimen examined.

USA – Illinois • Montgomery County, Shoal Creek Conservation Area; 39.1871, - 89.5963; on 6 cm. diam. decorticated branch on the ground; 4 Apr 2004; A. N. Miller ANM 1 (holotype ILLS 76895!) .

Notes.

The only available LSU sequence (KX 290919, Hernández-Restrepo et al. 2016) of X. shoalensis indicates that the species is a member of Ceratostomella (Fig. 1). Based on the sequence similarity with X. sordida (99.2 %), they are likely conspecific. However, according to its diagnosis, this species does not match the generic delimitation of Ceratostomella . Xylomelasma shoalensis was described with immersed, globose to subglobose and smaller (175–265 μm diam) ascomata featuring a rostrate, slender, non-sulcate neck and hyaline to yellowish-brown, oblong to suballantoid, septate ascospores in unitunicate asci. Its LSU sequence was not obtained from a mycelium of an axenic culture but directly from ascomata on the host. It is evident that morphology belongs to a different genus and species. We examined the holotype, but no traces of a Ceratostomella - like fungus could be found. Therefore, due to this ambiguity, X. shoalensis is excluded from Ceratostomella .