environmental samplesuncultured Fibrobacter sp.uncultured Fibrobacter sp.uncultured Fibrobacter sp.uncultured Fibrobacter sp.uncultured Fibrobacter sp.uncultured Fibrobacter sp.uncultured Fibrobacter sp.uncultured Fibrobacter sp.uncultured Fibrobacter sp.uncultured Fibrobacter sp.uncultured Fibrobacter sp.uncultured Fibrobacter sp.uncultured Fibrobacter sp.uncultured Fibrobacter sp.uncultured Fibrobacter sp.uncultured Fibrobacter sp.uncultured Fibrobacter sp.uncultured Fibrobacter sp.uncultured Fibrobacter sp.