About: Sphenopalatine vacuities

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In rodents, sphenopalatine vacuities are perforations of the roof of the , the open space behind the palate, in between the . They may perforate the presphenoid or . Their development and form are variable between and within species, and features of the sphenopalatine vacuities have been used as characters in cladistic analyses. The development of sphenopalatine vacuities has also been used to distinguish among members of the Sciurini group of squirrels.

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  • In rodents, sphenopalatine vacuities are perforations of the roof of the , the open space behind the palate, in between the . They may perforate the presphenoid or . Their development and form are variable between and within species, and features of the sphenopalatine vacuities have been used as characters in cladistic analyses. Among Oryzomyini, a mainly South American group, a 2006 study distinguished three character states—large, wide vacuities, as among others in Oligoryzomys and Holochilus; small, narrow vacuities, as among others in Lundomys and Nephelomys; and no or vestigial vacuities, as among others in Mindomys and Oryzomys. all have very large sphenopalatine vacuities, as does Sigmodon. The vacuities in Reithrodon, formerly considered a phyllotine, are especially large. Nyctomys is special in having sphenopalatine vacuities restricted to the basisphenoid bone. for the development of the vacuities in Cricetidae is difficult to determine, but their absence may be primitive in the Neotominae. The development of sphenopalatine vacuities has also been used to distinguish among members of the Sciurini group of squirrels. (en)
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  • In rodents, sphenopalatine vacuities are perforations of the roof of the , the open space behind the palate, in between the . They may perforate the presphenoid or . Their development and form are variable between and within species, and features of the sphenopalatine vacuities have been used as characters in cladistic analyses. The development of sphenopalatine vacuities has also been used to distinguish among members of the Sciurini group of squirrels. (en)
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  • Sphenopalatine vacuities (en)
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