Productus giganteus is an extinct species of brachiopod, found in Carboniferous limestone deposits. These marine organisms lived in shallow seas and are important for understanding the paleoecology and sedimentology of the Carboniferous period. Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/stock-photo-productus-giganteus-is-an-extinct-species-of-brachiopod-found-in-carboniferous-115035929.html
Brachiopods of the Carboniferous period, vintage engraved illustration. Earth before man – 1886. Stock Vectorhttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/stock-photo-brachiopods-of-the-carboniferous-period-vintage-engraved-illustration-84300537.html