''Philidris nagasau'' is a species of

ant Ants are Eusociality, eusocial insects of the Family (biology), family Formicidae and, along with the related wasps and bees, belong to the Taxonomy (biology), order Hymenoptera. Ants evolved from Vespoidea, vespoid wasp ancestors in the Cre ...

in the genus '' Philidris''. Described by William M. Mann in 1921, the species is endemic to

Fiji Fiji, officially the Republic of Fiji, is an island country in Melanesia, part of Oceania in the South Pacific Ocean. It lies about north-northeast of New Zealand. Fiji consists of an archipelago of more than 330 islands—of which about ...

. ''Philidris nagasau'' makes its living by planting seeds of

epiphytes An epiphyte is a plant or plant-like organism that grows on the surface of another plant and derives its moisture and nutrients from the air, rain, water (in marine environments) or from debris accumulating around it. The plants on which epiphyt ...

such as '' Squamellaria'' in the bark of host trees and tending them like a garden. Their planting habits share a remarkable similarity to that of humans. They are able to identify the seeds of their preferred plant, plant these seeds, guard their plots from potential predators, and finally use their own feces to fertilize the young seedling. There is also evidence that these ants lost their ability to nest before ''Squamellaria'' developed

domatia A domatium (plural: domatia, from the Latin "domus", meaning home) is a tiny chamber that houses arthropods, produced by a plant. Ideally domatia differ from galls in that they are produced by the plant rather than being induced by their inhabi ...

for these ants to reside. This suggests that ''P. nagasau'' selectively breed ''Squamellaria'' with wider openings that eventually developed into domatia.

References

Dolichoderinae Insects described in 1887 Insects of Fiji {{Dolichoderinae-stub