Acrotheloidea is a superfamily of Discinid brachiopods, alternatively ascribed to the lingulids—for a discussion of discinid taxonomy, see Discinida....

Eukaryota Kingdom: Animalia Phylum: Brachiopoda Class: Lingulata Order: Lingulida Waagen, 1885 Superfamilies Linguloidea †Obolidae †Acrotheloidea Discinoidea...

and the extinct superfamilies Botsfordioidea (early—mid-Cambrian) and Acrotheloidea (early Cambrian–Early Ordovician). It represents a sister taxon to the...