Table 1.

Body volume measurements for the four species of tardigrades investigated.

Species (number of animals)	Body volume (nl) (mean ±s.e.m.)	Class	Habitat
E. sigismundi (n = 5)	0.9 ± 0.1	Heterotardigrada	Marine
E. testudo (n = 5)	2.6 ± 0.4	Heterotardigrada	Limno-terrestrial
R. oberhaeuseri (n = 5)	4.7 ± 1.0	Eutardigrada	Limno-terrestrial
H. crispae (n = 20)	4.1 ± 0.3*	Eutardigrada	Marine

^*From Halberg et al. (2013b).