Abstract:
The internal oral morphology of tadpoles of Dermatonotus muelleri and Elachistocleis bicolor were analyzed using scanning electron and stereoscopic microscopy. Similarities between these larvae include the architecture of the buccal roof and floor: wide and almost flattened surfaces; unperforated internal nares appearing as circular depressions; absence of infralabial and lingual papillae; presence of massive, triangular postnarial papillae; and absence of other papillae posterior to the median ridge. Differences include a raised glottis placed in the center of the buccal floor arena in D. muelleri, and the number of the lateral papillae positioned at each side of the prenarial arena. We suggest that the oral flaps and the roof papillae play a significant role in the capture of food particles by establishing the inflow of "alimentary water", and aggregating food particles and mucus inside the buccopharyngeal cavity. Microhylid tadpoles have a stable pattern of body size and shape, and oral and buccopharyngeal features, which may reflect ecological and functional constraints relative to the morphology of other suspension feeding anuran larvae.
Referencias:
- Altig, R., Johnston, G.F., Guilds of anuran larvae: Relationships among developmental modes, morphologies and habitats (1989) Herpetol. Monogr., 3, pp. 81-109
- Chou, W.-H., Lin, J.-Y., Tadpoles of Taiwan (1997) NMNS Spec. Publ., 7, pp. 1-98
- Donnelly, M.A., De Sá, R.O., Guyer, C., Description of the tadpole of Gastrophryne pictiventris and Nelsonophryne aterrima (Anura: Microhylidae), with a review of morphological variations in free-swimming microhylid larvae (1990) Amer. Mus. Novitates, 2976, pp. 1-19
- Duellman, W.E., Amphibian species of the world: Additions and corrections (1993) Univ. Kansas Mus. Nat. Hist., Special Publ. No., 21, pp. 1-372
- Echeverría, D.D., Microscopía electrónica de barrido del aparato bucal de las larvas de Melanophryniscus stelzneri (Weyembergh, 1875) (Anura, Bufonidae) (1992) Alytes, 10, pp. 137-143
- Gosner, K.L., A simplified table for staging anuran embryos and larvae with notes on identification (1960) Herpetologica, 16, pp. 183-190
- Inger, R.F., Tadpoles of the forested regions of Borneo (1985) Fieldiana, Zool., N.S., 26, pp. 1-89
- Lavilla, E.O., The tadpole of Dermatonotus muelleri (Anura: Microhylidae) (1992) Boll. Mus. Reg. Sci. Nat. Torino, 10, pp. 63-71
- Langone, J.A., Ontogenetic changes in spiracular and proctodeal tube orientation in Elachistocleis bicolor (Anura: Microhylidae) (1991) J. Herpetol., 25, pp. 119-121
- Estructura del condrocráneo y esqueleto visceral de larvas de Elachistocleis bicolor (Valenciennes, 1838) (Anura: Microhylidae) (1995) Cuad. Herp., A.H.A., 9, pp. 45-49
- Martoja, R., Martoja-Pierson, M., (1970) Técnicas de histología animal, , Torray-Masson Editors. Barcelona
- Viertel, B., The oral cavities of central European anuran larvae (Amphibia): Morphology, ontogenesis and generic diagnosis (1982) Amphibia-Reptilia, 4, pp. 327-360
- Vizotto, D.L., (1967) Desenvolvimiento de Anuros da regiao norte-ocidental do estado de Sao Paulo, , Unpubl. Ph.D. Thesis, Univ. Sao Paulo
- Wassersug, R.J., Oral morphology of anuran larvae: Terminology and general description (1976) Occas. Pap. Mus. Nat. Hist. Univ. Kansas, 48, pp. 1-23
- Internal oral features of larvae from eight anuran families: Functional, systematic, evolutionary and ecological considerations (1980) Mus. Nat. Hist. Univ. Kansas, Misc. Publ., 68, pp. 1-146
- The Pseudohemisus tadpole: A morphological link between Microhylids (Orton Type 2) and Ranoid (Orton Type 4) larvae (1984) Herpetologica, 40, pp. 138-149
- Pyburn, W.F., The biology of the Peret́ toad, Otophryne robusta (Microhyhdae), with special consideration of its fossorial larva and systematic relationships (1987) Zool. J. Linn. Soc., 91, pp. 137-169
- Wild, E.R., News genus and species of Amazonian Microhylid frog with a phylogenetic analysis of New World genera (1995) Copei, 1995, pp. 837-849
- Williams, J.D., Gudynas, E., Descriptión de la larva de Elachistocleis bicolor (Valenciennes,1838) (Anura: Microhylidae) (1987) Amphibia-Reptilia, 8, pp. 225-229
Citas:
---------- APA ----------
Echeverría, D.D. & Lavilla, E.O.
(2000)
. Internal oral morphology of tadpoles of Dermatonotus muelleri and Elachistocteis bicolor. Journal of Herpetology, 34(4), 517-523.
http://dx.doi.org/10.2307/1565265---------- CHICAGO ----------
Echeverría, D.D., Lavilla, E.O.
"Internal oral morphology of tadpoles of Dermatonotus muelleri and Elachistocteis bicolor"
. Journal of Herpetology 34, no. 4
(2000) : 517-523.
http://dx.doi.org/10.2307/1565265---------- MLA ----------
Echeverría, D.D., Lavilla, E.O.
"Internal oral morphology of tadpoles of Dermatonotus muelleri and Elachistocteis bicolor"
. Journal of Herpetology, vol. 34, no. 4, 2000, pp. 517-523.
http://dx.doi.org/10.2307/1565265---------- VANCOUVER ----------
Echeverría, D.D., Lavilla, E.O. Internal oral morphology of tadpoles of Dermatonotus muelleri and Elachistocteis bicolor. J. Herpetol. 2000;34(4):517-523.
http://dx.doi.org/10.2307/1565265