Astrothelium scoriothelium is a species of crustose lichen-forming fungus in the family Trypetheliaceae. It was introduced as a replacement name by André Aptroot and Robert Lücking for Trypethelium scorioides Leight. (1866), which was preoccupied by Astrothelium scorioides Nyl. (1867). The type collection of the replaced name is from Brazil (Amazonas), gathered by the English bryologist Richard Spruce; the holotype is maintained by the British Museum (BM). Another name applied to this lichen is Pseudopyrenula infuscatula var. tecomae Vain. (1915), typified from specimens collected in Guadeloupe near Camp-Jacob.