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*Lasanius problematicus* Traquair, serrations plus other features

Seggholm, [nr.] Muirkirk, [Lesmahagow, (Lanarkshire)], [Scotland] Downtonian, [Pridoli], [Silurian (Upper)] Little skeletal ossification occurs in this member of the Anaspida (Lasaniidae). Characteristic jagged edge (like fulcral scales?) visible.