Scanning electron microscopy of the oral apparatus and buccopharyngeal cavity of Atelognathus salai larvae (Anura, Neobatrachia)
The horny structures of the buccal apparatus and buccopharyngeal cavity of Atelognathus salai were studied by scanning electron microscopy (SEM) and were compared to other known species of Atelognathus and related genera. Critical-point dehydration was done on the specimen and then coated with gold...
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| Autores principales: | , |
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2006
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15191397_v5_n1_p77_Echeverria http://hdl.handle.net/20.500.12110/paper_15191397_v5_n1_p77_Echeverria |
| Aporte de: |
| Sumario: | The horny structures of the buccal apparatus and buccopharyngeal cavity of Atelognathus salai were studied by scanning electron microscopy (SEM) and were compared to other known species of Atelognathus and related genera. Critical-point dehydration was done on the specimen and then coated with gold before using SEM for observations and photographs. The labial teeth form continuous, homogeneous rows and each tooth comprises a base, a neck, and a paddle with subequal marginal serrations. The prelingual region has six infralabial papillae on the buccopharyngeal cavity floor. There are elliptical choanae oriented transversally to the cephalocaudal axis on the buccopharyngeal cavity roof. The morphology of the oral apparatus and buccopharyngeal cavity observed in A.salai matches the general descriptions for other Atelognathus species. The characteristics in common with other Patagonian leptodactylid frogs of different habits may be attributed mainly to phylogenetic constraint rather than to convergent ecological adaptations. |
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