García-Alcalde, Jenaro L, and Zarela Herrera. “Tectogonotoechia Rivasi N. Sp. A New Lower Pragian Celtiberian (Spain) Ancystrorhynchoidea Rhynchonellid Brachiopod”. Spanish Journal of Palaeontology, vol. 32, no. 1, Apr. 2020, pp. 115-28, doi:10.7203/sjp.32.1.17035.