ID number: BIRUG: BU415 Institution: The Lapworth Museum of Geology Named collection: Holcroft Collection Definition: Ktenoura retrospinosa gen. et sp. nov. Object type: Trilobita Place collected: ENGLAND: West Midlands, Dudley, Wren's Nest Collector: Holcroft Chronostratigraphy: SILURIAN: Wenlock, Homerian Lithology: Wenlock Limestone/ Shale Type, figured or cited: Figured