Fang 2009. Guizhoumyophoria, a new name for Quadratia Yin, 1974 (Bivalvia: Trigonioida: Myophoriidae), preoccupied by Quadratia Muir-Wood and Cooper, 1960 (Brachiopoda: Strophomenida: Productellidae). Journal of Paleontology, 83(6), November 2009: 998