A fossilized lungfish of a Dipterus valenciennesi from the Achanarras Limestone Member, Old Red Sandstone at the Achanarras Quarry in Caithness, Scotland. These basal lungfish are found in various Devonian-aged deposits in Europe. The Achanarras Quarry is now protected and productive sites are apparently underwater making quality fish increasingly rare on the market. From an old English collection in the early 1980s.














