| development of the pattern of dentition and dental laminae of costa rican plethodontid salamanders (amphibia: urodela). | the pattern of development of teeth and dental laminae of three costa rican plethodontids (amphibia, urodela, plethodontidae) was investigated using transparent preparations, light microscopy and scanning electron microscopy. the teeth of the jaws are monostichously positioned, those of the posterior vomeral parts are polystichously arranged. the anterior vomeral parts carry monostichously positioned teeth at the caudal margin; yet, the adult bolitoglossa subpalmata possesses two lines. as a sex ... | 2000 | 10932323 |
| teeth and their sex-dependent dimorphic shape in three species of costa rican plethodontid salamanders (amphibia: urodela). | the shape of the teeth and their sex-dependent dimorphic expression in three species of costa rican plethodontids (bolitoglossa subpalmata, oedipina uniformis and nototriton abscondens) were studied using light microscopy and scanning electron microscopy. the teeth of the vomerine tooth patches are about one third larger than the teeth of the jaws in b. subpalmata and o. uniformis, whereas all teeth of n. abscondens are of about uniform size. the occurrence of bicuspid tooth germs in the fetus p ... | 2000 | 11035634 |
| the structure and development of the skull of costa rican plethodontid salamanders (amphibia: urodela). | we describe the structure of the skulls of the costa rican plethodontid salamanders bolitoglossa subpalmata, oedipina uniformis and nototriton abscondens, and the characteristic sequences of development and ossification of the bony elements resulting from direct development using mainly cleared and stained specimens. significant differences between the species studied are observed. n. abscondens possesses the broadest premaxillary pars dentalis and o. uniformis the narrowest one. the premaxillar ... | 2000 | 11125805 |