Fig. 1 | The ISME Journal

Fig. 1

From: Endosymbiont genomes yield clues of tubeworm success

Fig. 1

Major siboglinid lineages and life cycles associated with horizontally transmitted symbionts. a Giant tubeworm Riftia growing in hydrothermal vent (Image courtesy of Tim Shank from Woods Hole Oceanographic Institution). b Lamellibrachia growing near a hydrocarbon seep. c Galathealinum growing in deep-sea muddy habitats. d The different life stages of siboglinids associated with horizontally transmitted symbionts (modified from Fig. 2c of Bright and Bulgheresi [12] with updated understanding of siboglinid-symbiont transmission mode). The embryo and larval stage are aposymbiotic. Symbionts infect the settled larval skin, and then migrate to mesoderm that later will develop into trophosome. Symbionts are released upon host death. Environmental bacteria are shown in blue and pink

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