Harlow H J, Phillips J A, Ralph C L
Physiol Behav. 1982 Aug;29(2):307-13. doi: 10.1016/0031-9384(82)90020-8.
Circadian rhythms of body temperature, activity and oxygen consumption were recorded in the nine-banded armadillo, Dasypus novemcinctus, a mammal lacking a distinct pineal gland. The rhythms were entrained by light-dark cycles and appeared to be phase-coupled. Under constant illumination, the animals displayed free-running circadian rhythms with period lengths of slightly less than 24 hr. Melatonin implants caused a lengthening of the free-running period of activity and body temperature. The occurrence of a "normal" circadian rhythmicity in the armadillo indicates that the pineal organ is not necessary for the circadian organization of this animal whereas melatonin of non-pineal origin may have a role.
在九带犰狳（Dasypus novemcinctus）这种没有明显松果体的哺乳动物中记录了体温、活动和耗氧量的昼夜节律。这些节律由明暗周期调节，并且似乎是相位耦合的。在持续光照下，动物表现出自由运行的昼夜节律，周期长度略小于24小时。褪黑素植入导致活动和体温的自由运行周期延长。犰狳中出现“正常”的昼夜节律表明，松果体对于该动物的昼夜节律组织并非必需，而非松果体来源的褪黑素可能发挥作用。
