Day - night rhythm in plasma melatonin in a mammal lacking a distinct pineal gland, the nine-banded armadillo.
D000818:Animals; D001135:Armadillos / Q000097:blood*; D001831:Body Temperature; D002940:Circadian Rhythm; D008027:Light; D008550:Melatonin / Q000097:blood*; D010507:Periodicity; D010870:Pineal Gland / Q000502:physiology*; D011863:Radioimmunoassay; D004490:Xenarthra / Q000097:blood*
D008550:Melatonin