''Poritia phormedon'' is an

Indomalayan The Indomalayan realm is one of the eight biogeographic realms. It extends across most of South and Southeast Asia and into the southern parts of East Asia. Also called the Oriental realm by biogeographers, Indomalaya spreads all over the Ind ...

butterfly

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

Borneo Borneo () is the List of islands by area, third-largest island in the world, with an area of , and population of 23,053,723 (2020 national censuses). Situated at the geographic centre of Maritime Southeast Asia, it is one of the Greater Sunda ...

that belongs to the lycaenids, the blues family. ''Poritia phormedon'' was described by

Hamilton Herbert Druce Hamilton Herbert Charles James Druce (26 October 1866 – 21 June 1922) was an English entomologist who specialised in Lycaenidae and to a lesser extent Hesperiidae. He is not to be confused with his father, the English entomologist Herbert Dr ...

in 1895.

Hans Fruhstorfer Hans Fruhstorfer (1866 – 1922) was a German explorer, insect and shell trader and entomologist who specialised in Lepidoptera. He collected and described new species of exotic butterflies, especially in Adalbert Seitz's ''Macrolepidoptera of t ...

in Seitz ( page 1008 plate 34 fig.i) provides a description differentiating ''phormedon'' from neighbouring taxa. Seitz, A., 1912-1927. ''Die Indo-Australien Tagfalter. Theclinae, Poritiinae, Hesperiidae. Grossschmetterlinge Erde'' 9: 799-1107, pls. 138-175

References

Butterflies described in 1895 Poritia {{Poritiinae-stub