Table 1.

Stereological parameters used for rhythmic and arrhythmic individuals of Cryptomys hottentotus pretoriae, Fukomys anselli, and F. damarensis

Animal ID	Circadian chronotype	Counting frame size (μm)	Sampling grid size (μm)	Cut thickness (μm)	Average species mounted thickness (μm)	Vertical guard zones (top and bottom, μm)	Section interval	Number of sampling sites	Average CE (Gunders, m=0)	Average CE (Gunders, m=1)
C. hottentotus pretoriae
CHP2	R	275×185×12	400×300	50	20	5	2	263	0.13	0.06
CHP8	R	275×185×12	400×300	50	20	5	2	307	0.04	0.04
CHP12	R	275×185×12	400×300	50	20	5	2	344	0.14	0.05
CHP1	AR	275×185×12	400×300	50	20	5	2	421	0.04	0.04
CHP3	AR	275×185×12	400×300	50	20	5	2	347	0.06	0.04
CHP7	AR	275×185×12	400×300	50	20	5	2	358	0.05	0.04
F. anselli
FA2	R	275×185×10	400×300	50	14	5	2	521	0.07	0.05
FA3	R	275×185×10	400×300	50	14	5	2	438	0.09	0.05
FA7	R	275×185×10	400×300	50	14	5	2	352	0.10	0.05
FA4	AR	275×185×10	400×300	50	14	5	2	446	0.12	0.05
FA5	AR	275×185×10	400×300	50	14	5	2	458	0.07	0.04
FA6	AR	275×185×10	400×300	50	14	5	2	348	0.04	0.04
F. damarensis
FD4	R	275×185×10	400×300	50	15	5	2	331	0.05	0.04
FD6	R	275×185×10	400×300	50	15	5	2	476	0.05	0.04
FD7	R	275×185×10	400×300	50	15	5	2	376	0.08	0.04
FD1	AR	275×185×10	400×300	50	15	5	2	436	0.04	0.04
FD8	AR	275×185×10	400×300	50	15	5	2	443	0.04	0.04
FD13	AR	275×185×10	400×300	50	15	5	2	371	0.08	0.05