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English: Supplementary Figure 10. Wavelength Dispersive X-ray elemental map of Kerygmachela kierkegaardi and detailed features of tardigrades. a, Wavelength Dispersive X-ray elemental map of carbon of the head region of MGUH 32049, showing the anteriorly-rounded central brain neuropil. Carbon-rich region (red) is superimposed upon the topographic map (blue). b, Confocal laser scanning microscopic image of the central nervous system of the eutardigrade Hypsibius dujardini which was labeled for acetylated α-tubulin. Image courtesy of V. Gross. c, Bucco-pharyngeal apparatus of the eutardigrade Milnesium berladnicorum1. Image courtesy of D. A. Ciobanu. d, Differential Interference Contrast (DIC) image of the bucco-pharyngeal apparatus of the eutardigrade Dactylobiotus sp., KOPRIF5001. e, SEM image of the mouth part of Dactylobitus sp. Peribuccal lamellae (asterisk) and peribuccal lamellae (arrow), KOPRIF5002. f, Schematic figure of nervous system and buccopharyngeal apparatus of the eutardigrades Macrobiotus cf. harmsworth (modified from 2). g, schematic figure of nervous system and buccopharyngeal apparatus of the heterotardigrade Actinarctus doryphorus3. The third brain lobes (bl3) and subpharyngeal ganglion (g0) as originally identified by ref (3) has been removed, as these have not been confirmed by other studies4–7. cbn, central brain neuropil; phr, pharynx; sfc, stylet furca; stl, stylet; stc, stylet coat.