FIGURE 15. A–C in Definition of families, subfamilies, genera and subgenera of the Eutardigrada, and keys to their identification

FIGURE 15. A–C: Variants of bucco-pharyngeal apparatuses of the Hypsibiinae model, Hypsibius type. A, Halobiotus variant; B, Acutuncus variant; C, Ramazzottius variant; D, bucco-pharyngeal apparatus of the Hypsibiinae model, Mixibius type. da = dorsal apophysis; dlt = dorsal longitudinal thickening; va = ventral apophysis; vlt = ventral longitudinal thickening. (A, from Pilato & Binda, 1996b; B, from Pilato & Binda 1997; C, from Binda & Pilato, 1986; D, from Pilato, 1992).