Teskeyellus cyanommatus is a species of horsefly in the family Tabanidae discovered in Manaus, Brazil in 2017.

[1] The fly's abdomen and thorax are completely covered in bright yellow and black striped fur, imitative of a sand wasp, and females are thought to not require blood meals to reproduce, unlike most tabanids.

Little is known so far about its ecology and habitat, but it likely has a wider range in the Amazon Basin.

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