Calohypsibiidae

Pilato, Giovanni & Binda, Maria Grazia, 2010, Definition of families, subfamilies, genera and subgenera of the Eutardigrada, and keys to their identification, Zootaxa 2404, pp. 1-54 : 47

Key to the genera of Calohypsibiidae

1. Claws present on all pairs of legs. Buccal tube with or without ventral lamina.......................................................... 2

- Claws absent on the fourth pair of legs. Buccal tube with ventral lamina ................................................................... 4

2. Secondary branches of the claws reduced to a small spur or absent ( Fig. 7 C,D). Buccal tube with ventral lamina...... ......................................................................................................................................................... Haplomacrobiotus

- Secondary branches of the claws not so reduced, or reduced only on the hind legs. Buccal tube with or without ven- tral lamina ..................................................................................................................................................................... 3

3. Buccal tube without ventral lamina ( Fig. 8 B,C,D). Normally developed secondary branches of the claws ( Fig. 7 A).. ................................................................................................................................................................. Calohypsibius

- Buccal tube with ventral lamina ( Fig. 8 A). Hind legs with two claws or only one claw. The secondary branches may be normally developed or reduced, particularly on the hind legs, as in Fig. 7 B................................. Parhexapodibius

4. Secondary branches of the claws present ( Fig. 7 B) ................................................................................ Hexapodibius

- The claws are simple claws ( Fig. 7 D)............................................................................................. Haplohexapodibius

Figures

FIGURE 7. Claws of Calohypsibiidae. A, claws normally developed; B, claws reduced of Hexapodibius; C, claws with reduced secondary branch; D, simple claws (the secondary branch is lacking). ap = accessory points; bs = basal section; pb = primary branch; sb = secondary branch. (A, from Binda & Pilato, 1969; B, from Pilato, 1969 a; C, from Pilato, 1973 a).

FIGURE 8. Bucco-pharyngeal apparatuses of: A, Hexapodibius type; B – D, Calohypsibius type: B, in lateral view; C, in dorsal view; D, in ventral view. cp = caudal processes; da = dorsal apophysis; dlt = dorsal longitudinal thickening; va = ventral apophysis; vl = ventral lamina.