length. Cranial characteristics The species B. guarantanus has been reported to have sexual dimorphism in the head. That is, the head of the male is wider than the head of the female. The genus Brasilotyphlus also has an open eye socket. The eye was originally thought to not be visible from the outside or not be present at all. One dissection concluded that the eyes were either too small to be seen by the naked eye, or not present. The bones of the skull are transparent, allowing the brain to be seen through them. The tentacular opening has a greater posterior distance from the nostril then that of other known Gymnophiona and is much closer to the mouth. Its tentacles are also relatively small. All specimens of B. brasiliensis have been flattened or otherwise damaged. Measurements are therefore estimated. Most of the data on this genus is taken from the species Brasilotyphlus guarantanus. Dentition The genus Brasilotyphlus has a three-series dentition. The inner mandibular teeth are absent. The maxillary teeth can extend to or past the choanae, but do not always. It has a large diastema, or gap, between its vomerine and palatine teeth. It contains premaxillary, maxillary, prevomerine, and palatine teeth. Most teeth monocuspid. The prevomerine and palatine teeth are the only exceptions and they are bicuspid. The front end of the tongue is attached to the gums directly behind the dentary teeth. Scales The genus Brasilotyphuls has dermal scales present in its folds. The scales are mostly present on the posterior end of the body. The species Brasilotyphlus braziliensis has scales which start around the 25th fold of the body. The scales start off very small. At the middle of the body there are two rows of scales. The remaining posterior end of the body has five rows of scales on each fold and they are irregularly organized. It has a brown coloration throughout. References Amphibian genera Taxonomy articles created by Polbot