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*Lasanius problematicus* Traquair; well-defined body scales and spines

Birkenhead Burn, Lesmahagow Inlier, Lesmahagow, (Lanarkshire), [Scotland] 'fish bed', Fish Bed Formation, ?Llandovery/?Wenlock, [Sheinwoodian-Gleedonian], Silurian [Middle] Part and counterpart. Little skeletal ossification occurs in this member of the Anaspida (Lasaniidae). Good example, without body outline, but showing the characteristic jagged edge of the body scales and the spines.