ID number: BIRUG: BU416 Institution: The Lapworth Museum of Geology Definition: Ktenoura retrospinosa gen. et sp. nov. Object type: Trilobita Place collected: ENGLAND: West Midlands, Dudley, Wren's Nest Collector: Ketley Chronostratigraphy: SILURIAN: Wenlock Lithology: Wenlock Limestone/ Shale Type, figured or cited: Figured