Acanthotretella is a genus of brachiopods known from the Burgess Shale and the Guanshan fauna. Their spines are proposed to be homologous with those of the Siphonotretids. Species Acanthotretella decaius Hu, Zhang, Holmer & Skovsted, 2010 Acanthotretella spinosa Holmer & Caron, 2006 References Prehistoric brachiopod genera Fossil taxa described in 2006 Lingulata