foliate papilla

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foliate papilla

[′fō·lē·ət pə′pil·ə]
(vertebrate zoology)
One of the papillae found on the posterolateral margin of the tongue of many mammals, but vestigial or absent in humans.
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The foliate papillae revealed five epithelium folds separated by parallel grooves on the lateral-caudal margin of the tongue.
Is well known that the presence of foliate papillae has been considered a primitive characteristic (Kobayashi et al.); a remarkable fact is that in spite of been Xenarthra a primitive mammalian order (Kriegs et al., 2006), only Euphractus sexcinctus (Morais & Watanabe) have these papillae; indeed, the absence of this papillae here reported for Z.