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Comparison of the bony labyrinth (inner ear) of extinct and extant hedgehogs (Eulipotyphla, Mammalia) and their effect on previously established phylogenetic trees

AuthorsGlabbeek, Flora van
AdvisorHoek Ostende, L. van den
Issue Date2014
PublisherUniversity of Leiden
Naturalis Biodiversity Center
AbstractAlthough many scientists have studied the phylogeny of the Erinaceidae and have perceived the living and fossil groups to be near-relatives; the relationships, especially between extant and extinct species, are still tangled. This research is conducted in order to clarify the erinaceid phylogeny based on a combination of morphological and molecular data, while at the same time applying the new information on the bony labyrinth. This has resulted in the first detailed description of the bony labyrinth of the Erinaceidae, including the extinct genus Postpalerinaceus and Parasorex. This description provides new anatomical data that was used in the reconstruction of a phylogenetic tree. The trees based only on the bony labyrinth of extant species give a clear distinction between Erinaceinae and Galericinae. However, when fossils are included, some positions of the species are counter-intuitive as the extinct Erinaceinae genus Amphechinus is placed among the Galericinae. At the same time, the extinct Galericinae genus Parasorex is placed in the middle of the Erinaceinae clade. Nevertheless, the general pattern of genera remains the same, no matter what data source (e.g. DNA, morphology, the bony labyrinth) or species (extinct or extant) are used. Based on this finding, it can be concluded that the bony labyrinth is a trustworthy characteristic for determining Erinaceidae on genus level. In order to specify on species level more data is necessary.
DescriptionTrabajo de fin de máster
Appears in Collections:(MNCN) Tesis
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