ommatidium [FBbt_00004510]
One of the facets of the compound eye. It is composed of eight light-sensing photoreceptor cells (photoreceptor cell R1-R8) and accessory cells. There are around 800 ommatidia in each compound eye.
Note
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"label": "ommatidial precursor cluster"
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"PubMed": "15450980",
"DOI": "10.1016/j.tcb.2004.09.007"
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