Since the 2010s, the suggested close relationship between Opabinia and tardigrades/cycloneuralians are no longer supported, while the affinity of Opabinia as stem-group arthropod alongside Radiodonta (a clade that including Anomalocaris and its relatives[30]) and gilled lobopodians is widely accepted,[2][3][4] consistenlty recovered by multiple phylogenetic analysis,[31][32][33][34][35][36][37][38][39][40][41][42] as well as new discoveries such as the presence of arthropod-like gut glands[17][22] and intermediate taxon Kylinxia.[40]