. . . . . . . . . "Unavailable"@en . . "ZBN00965" . . . "SDN:P01::ZBN00965" . . "Abundance of Musculium lacustre (ITIS: 81430: WoRMS 181563) per unit area of the bed by sieving and picking under an optical microscope"@en . "accepted"@en . . . . . . . . . .