The Neotropical mayfly genus Borinquena Traver, 1938 so far comprises three described extant species from the Caribbean basin. Furthermore, three fossil species from Dominican amber have been described in this genus. Based on a single male imago, Borinquena schawallfussi sp. nov. is described in this contribution as the fourth fossil species of Borinquena from Miocene Dominican amber. The new species clearly differs from all other fossil and recent representatives of the genus Borinquena in forewing colouration and venation, hind wing shape and venation, and in the shape of penis lobes and their ventral spines.
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Vol. 67 • No. 1