Species: williamburyensis TRINAJSTIC & LONG, 2009
Etymology: After Williambury station where the type section of the Gneudna Formation is located and from which the specimen was found and in recognition for the assistance that the Percy family, who run Williambury Station, have given the University of Western Australia and the Western Australian Museum over many years.

Holotype: WAM 99.8.1

Locality: Willambury Station, 23?58’10”S, 115?12’30”E, Carnavron Basin, Northwest Western Australia State, Australia.

Horizon: KT Bed 7, 90 m above the base of the section within the carboniate facies, Gneudna Formation.

Biostratigraphy: transitans to puncata conodont zones.

Age: Frasnian Stage, Lower Late Devonian Epoch, Late Devonian.

Material: A partial specimen comprising associated nuchal, central and postorbital plates of the head shield, ethmoid ossification, the lower tooth plates, and incomplete median dorsal plate.

Paratypes:

Locality: Willambury Station, 23?58’10”S, 115?12’30”E, Carnavron Basin, Northwest Western Australia State, Australia.

Horizon: KT Bed 7, 12-14 and 20-22a, Gneudna Formation.

Biostratigraphy: transitans to puncata conodont zones.

Age: Frasnian Stage, Lower Late Devonian Epoch, Late Devonian.

WAM 99.8.20: Anterior dorsolaterla plate, anterior lateral plate, anterior median ventral plates.

WAM 96.4.7, 96.4.8, 99.8.5, 99.8.4: Preorbital plates.

WAM 99.8.15, 99.8.16: Postorbital plates.

WAM 96.4.19, 99.8.14, 99.8.13, 99.8.18: Central plates.

WAM 96.4.9: Nuchal plate.

WAM 86.4.12, 99.8.12: Paranuchal plates.

WAM 96.4.19, 99.8.1: Margial plates.

WAM 96.4.14, 96.4.16, 99.8.9, 99.8.10, 99.8.23: Tooth plates.

WAM 96.3.13: Autopalatine.

WAM 96.2.18: Occipital ossification.

WAM 99.8.22: Median dorsal plate.

WAM 99.8.12: Anterior lateral plate.

WAM 99.8/24: Anterior doroslateral plate.

WAM 99.8.7: Interolateral plate.

WAM 99.8.3: Spinal plate.

WAM 99.8.11, 99.8.25, 96.4.17: Pelvic claspers.