The study of fossil Onychonycteris finneyi, short wings having, does not seem to have enlarged cochlea. Further enlargement of the cochlea, Nancy Simmons has established an association of morphological criteria in cranial capacity testifying écholocatrice (enlargement of the cochlea, connection stylohyale-os tympanique, morphology stylohyale [paddle-like bifurcant to the top of the skull] or morphology of the orbital process of the malleus [not decisive criterion])
Utafiti wa mafuta Onychonycteris finneyi, short mbawa kuwa na, haionekani kuwa na cochlea wazi . Zaidi utvidgningen ya cochlea, Nancy Simmons imeanzisha muungano wa vigezo kubadilika kwa maumbile katika uwezo ya fuvu kushuhudia écholocatrice (utvidgningen ya cochlea, uhusiano stylohyale-os tympanique, morphologie du stylohyale [paddle-kama bifurcant juu ya fuvu] au maumbile ya mchakato wa orbital malleus [si maamuzi kigezo])