科研之友
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摘要
Descriptions of Testudines have their origin in the Triassic of Germany, Switzerland, Argentina and Thailand, exposing three distinct genres: Proganochelys, and Proterochersis Palaeochersis. The present study aimed to describe the bony anatomy of the skull of Chellus fimbriatus, contributing to extensive morphological descriptions relevant to the species, since there is little specific information related, and available in the literature. Such information may be relevant for understanding the adaptations to the environment, as well as the phylogenetic analyzes. We used two copies of Chellus fimbriatus, and adult females belonging to the collection of the Laboratory of Education and Research on Wild Animals (limpets), Federal University of Uberlandia, fixed in 10% formalin. The specimens were dissected (gutted and stripped) manually, seeking clarification and total viewing skull of Chellus fimbriatus, followed by bone identifications, recorded through photographs with a digital camera through direct observation macroscopic, and finally described anatomically. The flattened and pointed rostrally Skull Chellus fimbriatus, observed in this study is similar to some representatives of Tryonichidae. Joins the rostral projection in Arrow, Skull Chellus fimbriatus, the possible reduction or loss of some elements, such as the nasal bone, and the insertion of relatively small muscles. The jaw of Chellus fimbriatus is set to low, in projection rostral without tension, however, strong only at the point of insertion of the muscle adductor muscles, as well as the compound depressing. Considering the anatomy observed in the skull Chellus fimbriatus, it was found through interspecies comparisons, it is a species with unique characteristics, and some detached well as the continuous lengthening of bone located on the dorsal and ventral median diameter greater tympanic cavity and orbit, as well as, the absence of some articular joints and severe flattening of the whole cranial bone mass.
- 出版日期2014-4
