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