At some point in its evolution, the tubeworm ditched its own gut and now depends entirely on an internal symbiotic organ called the trophosome—home to intracellular, sulfur-oxidizing bacteria that the ...

They thrive on the abundant biopolymer lignocellulose, depending upon a phy-logenetically diverse community of hindgut microbes including Bacteria, Archaea, and unicellular amitochondriate Eukarya for ...