Table 1.

Summary of isotopic analyses: δ¹³C and ε* (diet, dental bioapatite and faeces) for sloths with known diets (through controlled-feeding (Bradypus, Choloepus) or constrained-diet faeces analyses (^aMylodon)).

(a) summary of isotopic data of sloths’ diets
taxa	diet component		δ13Cdiet component (‰)		contribution of each element [δ13C (‰)] to final signature of dietb	δ13Cdiet (‰)
Bradypus variegatus	rubber plant (Ficus elastica)		−28.67 ± 1.79		Monospecific diet	−28.67 ± 1.79
Choloepus hoffmanni	Purina® DogChow®		−16.5		−1.50	−26.37b
	quinoa		−25.8		−2.28
	broccoli		−27.3		−3.75
	sweet potato		−27.9		−4.66
	carrot		−25.3		−4.14
	spinach		−28.1		−7.29
	rubber plant		−29.4		−2.75
aMylodon darwinii	calculated from dung		—			−27.17c to −28.14d

(b) summary of isotopic data for dental bioapatite and faeces
	dental bioapatite			faeces
	n	δ13Cbioap (‰)	ε* (‰)	n	δ13Cfaeces (‰)	ε* (‰)
Bradypus variegatus	5	−18.65 ± 1	10.31 ± 1.03	5	−28.21 ± 0.53	0.48 ± 0.54
Choloepus hoffmanni	10	−14.08 ± 0.66	12.62 ± 0.68	15	−24.98 ± 0.63	1.43 ± 0.64
aMylodon darwinii	1	−12.46	15.12c to 16.13d	1	−26.7‰	—

^arecently extinct Pleistocene sloth.

^bcalculation based on a concentration-weighted linear mixing model [20].

^cassuming diet-faeces enrichment similar to that of Bradypus.

^dassuming diet-faeces enrichment similar to that of Choloepus.