Thibaudeau D Giselle, Altig Ronald
Department of Biological Sciences, Mississippi State University, Mississippi State, Mississippi 39762.
J Morphol. 1988 Jul;197(1):63-69. doi: 10.1002/jmor.1051970106.
The development of the oral structures of six species of anuran tadpoles with four different types of mouth parts and the metamorphic atrophy of these structures in two species with different mouth parts are described. The oral labia of typical tadpoles, oral flaps of microhylids, and lateral oral folds of Rhinophrynus are assumed to be homologous. We also suggest that the barbels of the tadpoles of Rhinophrynus are homologs of the marginal papillae of species with an oral disc. Developmental patterns and sequences of the oral structures of all tadpoles examined follow a common pattern: stomodeal invagination, oral pad development, jaw sheeth delimitation, tooth row ridge development, jaw sheath keratinization, and labial tooth keratinization. Developmental patterns remain constant, while interspecific differences are apparent because of truncations of ontogeny at specific stages. Metamorphic atrophy of oral structures occurs roughly in the reverse order of development, although the procedure is rapid and more haphazard than development.
本文描述了六种具有四种不同口部类型的无尾目蝌蚪口腔结构的发育情况，以及两种具有不同口部类型的物种中这些结构的变态萎缩过程。典型蝌蚪的口唇、姬蛙科的口瓣以及负子蟾的侧口褶被认为是同源的。我们还认为，负子蟾蝌蚪的触须与具有口盘的物种的边缘乳突是同源的。所有研究的蝌蚪口腔结构的发育模式和顺序遵循共同模式：口凹内陷、口垫发育、颌鞘界定、齿列嵴发育、颌鞘角质化和唇齿角质化。发育模式保持不变，而种间差异因特定阶段个体发育的截断而明显。口腔结构的变态萎缩大致以与发育相反的顺序发生，尽管这个过程比发育更快且更不规则。
