FIGURES 17–24 in An integrative redescription of Hypsibius dujardini (Doyère, 1840), the nominal taxon for Hypsibioidea (Tardigrada: Eutardigrada)

FIGURES 17–24. Details of the bucco-pharyngeal apparatus of the Hypsibius type (in SEM): 17—peribuccal ring and the oral cavity armature of H. dujardini, the arrow indicates the row of conical teeth located on the ring fold; 18—oral cavity armature of H. exemplaris sp. nov., the arrow indicates the row of conical teeth located on the ring fold whereas the empty arrowhead indicates the porous area on the lateral wall of the cavity; 19—the buccal crown and the dorsal apophyses for insertion of stylet muscles (AISM) of H. exemplaris; 20—the buccal crown and both dorsal and ventral apophyses for insertion of stylet muscles (AISM) of H. exemplaris sp. nov. in lateral view; 21—furca of H. exemplaris sp. nov., external side; 22—furca of H. dujardini, internal side with the stylet support; 23—pharynx of H. dujardini, arrowheads point out evident macroplacoid constrictions; 24—pharynx of H. exemplaris sp. nov., arrowheads point out subtle macroplacoid constrictions. All scale bars in µm.