Feeding mechanisms in two treefrogs, Hyla nana and Scinax nasicus (Anura: Hylidae)

Journal of Morphology
M F Vera CandiotiD D Echeverría

Abstract

After the description of the chondrocranium, hyobranchial apparatus, associated musculature, buccal apparatus, buccopharyngeal cavity, digestive tract, and gut contents, it was possible to define the feeding modes of Scinax nasicus and Hyla nana tadpoles (Gosner Stages 31-36). Scinax nasicus larvae are "typical" microphagous tadpoles, with keratodonts and robust rostrodonts appropriate for rasping surfaces and mincing of food particles; the buccopharyngeal cavity is equipped with filtering structures and has a conspicuous glandular zone and a highly developed branchial basket. In contrast, H. nana tadpoles have a modified buccal apparatus; the reduction of the buccopharyngeal and branchial basket structures, together with the high lever-arm ratio and the great development of the depressor muscles of the buccal floor are indicative of macrophagous feeding.

References

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May 1, 1972·Canadian Journal of Zoology·N Gradwell
Dec 6, 2001·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·R J Wassersug, M Yamashita
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Jun 1, 1991·Journal of Morphology·Karen M Carr, Ronald Altig

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Citations

Mar 12, 2005·Journal of Morphology·M F Vera CandiotiE O Lavilla
Dec 27, 2005·Zoology : Analysis of Complex Systems, ZACS·Alexander HaasIndraneil Das
Sep 4, 2021·Cladistics : the International Journal of the Willi Hennig Society·Victor G D OrricoCélio F B Haddad

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