NOVELTY - An isolated polypeptide, is new. The isolated polypeptide includes isolated polypeptide which has at least 95% sequence identity to the sequence of amino acid residues at position 20-430 of 430 amino acid sequence (SEQ ID NO: 4) fully defined in the specification or to the sequence of amino acid residues at position 21-393 of 393 amino acid sequence (SEQ ID NO: 6) fully defined in the specification, or is a fragment of the sequence of amino acid residues at position 20-430 of amino acid sequence of SEQ ID NO: 4.    USE - The isolated polypeptide is useful in composition for degrading cellulosic material and producing fermentation product (all claimed) such as fuel, potable ethanol, and/or platform chemicals.    ADVANTAGE - The isolated polypeptide has endoglucanase activity.    DETAILED DESCRIPTION - An isolated polypeptide, is new. The isolated polypeptide is chosen from (a) isolated polypeptide which has at least 95% sequence identity to the sequence of amino acid residues at position 20-430 of 430 amino acid sequence (SEQ ID NO: 4) fully defined in the specification or to the sequence of amino acid residues at position 21-393 of 393 amino acid sequence (SEQ ID NO: 6) fully defined in the specification, or is a fragment of the sequence of amino acid residues at position 20-430 of amino acid sequence of SEQ ID NO: 4 or a fragment of the sequence of amino acid residues at position of amino acid sequence of SEQ ID NO: 6, where the polypeptide has endoglucanase activity, or (b) isolated polypeptide comprising a catalytic domain, where the catalytic domain has at least 95% sequence identity to the sequence of amino acid residues at position 100-430 of amino acid sequence of SEQ ID NO: 4 or to the sequence of amino acid residues at position of 81-393 of amino acid sequence of SEQ ID NO: 6, or is a fragment of the sequence of amino acid residues at position of 100-430 of amino acid sequence of SEQ ID NO: 4 or a fragment of the sequence of amino acid residues at position of 81-393 of amino acid sequence of SEQ ID NO: 6, where the catalytic domain has endoglucanase activity. INDEPENDENT CLAIMS are included for the following:    (1) composition comprising the polypeptide and one or more enzymes chosen from a cellulase, a GH61 polypeptide having cellulolytic enhancing activity, a hemicellulase, an esterase, an expansin, a laccase, a ligninolytic enzyme, a pectinase, a peroxidase, a protease, and a swollenin;    (2) process for degrading a cellulosic material, involves (a) treating the cellulosic material with the polypeptide, a cellobiohydrolase, a beta -glucosidase, and a GH61 polypeptide having cellulolytic enhancing activity; and    (3) process for producing a fermentation product, involves (a) saccharifying a cellulosic material with an enzyme composition in the presence of the polypeptide, a cellobiohydrolase, a beta -glucosidase, and a GH61 polypeptide having cellulolytic enhancing activity, and (b) fermenting the saccharified cellulosic material with one or more fermenting microorganisms to produce the fermentation product.