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- W2034643058 abstract "Vibrissae are specialized sensory hairs that respond to mechanical stimuli. Sensory information from vibrissae is transmitted to the brain via the infraorbital nerve, which passes through the infraorbital foramen (IOF). Several analyses have documented that primates have smaller IOFs than non-primate mammals, and that haplorhines have smaller IOFs than strepsirrhines. These grade shifts in IOF area were attributed to differences in vibrissa development. Following earlier analyses, IOF area has been used to derive a general estimate of whiskeredness in extinct primates, and consequently, IOF area has been used in phylogenetic and paleoecological interpretations. Yet, the relationship between IOF area and vibrissa count has not been tested, and little is known about how IOF area and vibrissa counts vary among mammals. This study explores how relative IOF area and vibrissa count differ among 25 mammalian orders, and tests for a correlation between IOF area and vibrissa count. Results indicate that primates and dermopterans (Primatomorpha) have smaller IOFs than most non-primate mammals, but they do not have fewer vibrissae. In addition, strepsirrhines and haplorhines do not differ from one another in relative IOF area or vibrissa counts. Despite different patterns documented for IOF area and vibrissa count variation across mammals, results from this study do confirm that vibrissa count and IOF area are significantly and positively correlated (p < 0.0001). However, there is considerable scatter in the data, suggesting that vibrissa counts cannot be predicted from IOF area. There are three implications of these finding. First, IOF area reflects all mechanoreceptors in the maxillary region, not just vibrissae. Second, IOF area may be an informative feature in interpretations of the fossil record. Third, paleoecological interpretations based on vibrissae are not recommended." @default.
- W2034643058 created "2016-06-24" @default.
- W2034643058 creator A5034467464 @default.
- W2034643058 date "2010-06-01" @default.
- W2034643058 modified "2023-10-14" @default.
- W2034643058 title "A comparative analysis of vibrissa count and infraorbital foramen area in primates and other mammals" @default.
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- W2034643058 doi "https://doi.org/10.1016/j.jhevol.2010.01.012" @default.
- W2034643058 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20434193" @default.
- W2034643058 hasPublicationYear "2010" @default.
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