大西洋热液喷口两种新腹足类共生体：对内共生的依赖程度不同Two New Gastropod Holobionts from Atlantic Hydrothermal Vents Showing Different Levels of Endosymbiosis Dependence
Ifremer 等团队研究大西洋中脊热液喷口的两种 Peltospira 螺（P. gargantua 与 P. smaragdina）及其 Sulfurimonas 胞内共生菌。P. smaragdina 标本经 PTA 染色后在法国 SOLEIL 同步辐射 ANATOMIX 线站做 μCT 扫描（体素 3.09 μm / 1.3 μm），重建体数据导入 Dragonfly v2022.2 做预处理、分割与三维重建渲染，再与已发表的 P. gargantua 模型比较。结果显示 P. gargantua 食道腺和心室相对更大、齿舌退化，对共生依赖更强；P. smaragdina 食道腺较小、摄食器官较大，可能为混合营养。Teams led by Ifremer characterise two Mid-Atlantic Ridge vent snails, Peltospira gargantua and P. smaragdina, and their intracellular Sulfurimonas symbionts. A PTA-stained P. smaragdina specimen was scanned by synchrotron μCT at SOLEIL's ANATOMIX beamline (3.09 μm / 1.3 μm voxels); the reconstructed volumes were pre-processed, segmented and 3D-rendered in Dragonfly v2022.2, then compared with a published P. gargantua model. P. gargantua has a proportionally larger oesophageal gland and ventricle with a reduced radula, indicating stronger symbiont dependence, while P. smaragdina's smaller gland and larger feeding apparatus point to mixotrophy.