Eric Walker added Sidneyia - Wikipedia to Sidneyia inexpectans and Sidneyia

Eric Walker added They Put the Bite in Trilobite - The New York Times and Sidneyia - Wikipedia to Sidneyia inexpectans, and added Sidneyia inexpectans to Sidneyia

Eric Walker added Sidneyia inexpectans and Sidneyia - Wikipedia to Sidneyia, and added Sidneyia to Vicissicaudata

Eric Walker added Sidneyia to Vicissicaudata, and added Vicissicaudata to Artiopoda