Three new species of the Molgolaimus (Nematoda: Desmodoridae) are described from sample sediments collected in the South Atlantic. along the continental shelf break of Northeastern Brazil. This is the first time that new species of Molgolaimus have been described from sample sediments collected in the Brazilian coast. Molgolaimus sigmoides sp. https://www.pipingrockers.shop/product-category/apple-pectin/