Species: huxleyi HANCOCK & HOWSE, 1870
Etymology: In honor of Thomas Henry Huxley.
Holotype: NEWHM G.026.49
Locality: Railway cutting, 1 km south-south-west of Middridge, (NZ 2455 2535), Durham County, England.
Horizon: Marl Slate.
Age: Ufimian Stage-Lowest Kazanian Substage, Wordian Stage, Lower Guadelupian Stage, Lower Zechstein Epoch, Late Permian.
Material: Fragmentary skeleton.