Isostyla is a genus of moths of the Notodontidae family. It consists of the following species:
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Isostyla biquadrata Prout, 1918
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Isostyla ithomeina (Butler, 1872)
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Isostyla picata (Warren, 1900)
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Isostyla purefacta Prout, 1918
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Isostyla zetila (Boisduval, 1870)