Cornea, retina, and lens morphology in five Soricidae species (Soricomorpha: Mammalia)
作者： Sara Lluch , María José López-Fuster , Jacint Ventura
DOI: 10.1007/S12565-009-0042-1
关键词: Sorex 、 Anatomy 、 Crocidura russula 、 Neomys 、 Lens (anatomy) 、 Sorex minutus 、 Shrew 、 Biology 、 Common shrew 、 Sorex coronatus
摘要: We analyzed the cornea, retina, and lens of five species Soricidae (pygmy shrew, Sorex minutus; common araneus; Millet’s coronatus; water Neomys fodiens; greater white-toothed Crocidura russula) by light electron microscopy. In all these species, corneal epithelium showed a dead cell layer, which may increase refractive power thereby reducing hypermetropy that would be expected in small eye. Moreover, anterior surface was more curved than posterior, thus minimizing spherical aberrations. The thicker its smaller radii curvature indicated N. fodiens have higher most nocturnal C. russula. addition, only retina cone inner segments diurnal (genus Sorex) did we find megamitochondria might act as microlenses to enhance efficiency cones. russula, scarcity cones relatively yet abundant rod nuclei were found consistent with habits. flat arrangement, together lack this has less visual acuity other shrews studied here.
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