unclassified Bacteriasulfur-oxidizing endosymbiont of Gigantopelta aegisbacterium endosymbiont of Bathymodiolus sp. 5 SouthBathymodiolus heckerae thiotrophic gill symbiontbacterium endosymbiont of Bathymodiolus sp. 5 SouthBathymodiolus heckerae thiotrophic gill symbiontunidentified bacterial endosymbiontunidentified bacterial endosymbiont