Strain M-07^T was isolated from nitrifying–denitrifying activated sludge treating piggery wastewater. Phylogenetic analysis based on 16S rRNA gene sequences demonstrated that strain M-07^T belonged to the genus Advenella . 16S rRNA gene sequence similarity between M-07^T and Advenella incenata CCUG 45225^T, Advenella mimigardefordensis DPN7^T and Advenella kashmirensis WT001^T was 96.5, 97.3 and 96.9 %, respectively. The DNA G+C content of strain M-07^T was 49.5 mol%, which was approximately 5 mol% lower than the range for the genus Advenella (53.5–58.0 mol%). The predominant cellular fatty acids of strain M-07^T were C_{16 : 0}, summed feature 3 (comprising C_{16 : 1}ω7c and/or iso-C_{15 : 0} 2-OH), C_{17 : 0} cyclo and summed feature 2 (comprising one or more of C_{14 : 0} 3-OH, iso-C_{16 : 1} I, an unidentified fatty acid with an equivalent chain-length of 10.928 and C_{12 : 0} alde). The isoprenoid quinone was Q-8. On the basis of phenotypic characteristics, phylogenetic analysis and DNA–DNA relatedness, strain M-07^T should be classified as a novel species of the genus Advenella , for which the name Advenella faeciporci sp. nov. is proposed. The type strain is M-07^T ( = JCM 17746^T = KCTC 23732^T).