''Heterostomus'' is a genus of

flies Flies are insects of the Order (biology), order Diptera, the name being derived from the Ancient Greek, Greek δι- ''di-'' "two", and πτερόν ''pteron'' "wing". Insects of this order use only a single pair of wings to fly, the hindwin ...

in the family

Xylophagidae The Brachyceran infraorder Xylophagomorpha is a small group that consists solely of the family Xylophagidae, which presently contains subfamilies that were sometimes considered to be two small related families (Coenomyiidae and Rachiceridae). ...

. It includes a single species, ''Heterostomus curvipalpis'', known from

Chile Chile, officially the Republic of Chile, is a country in western South America. It is the southernmost country in the world and the closest to Antarctica, stretching along a narrow strip of land between the Andes, Andes Mountains and the Paci ...

. It has a reddish-brown

pupa A pupa (; : pupae) is the life stage of some insects undergoing transformation between immature and mature stages. Insects that go through a pupal stage are holometabolous: they go through four distinct stages in their life cycle, the stages th ...

with black spines. Some authors have placed ''Heterostomus'' in its own family: Heterostomidae. Woodley (2011) states that because its larvae are unknown, its family placement within Xylophagidae remains uncertain.

Distribution

References

{{Taxonbar, from1=Q18112994, from2=Q14669918 Xylophagidae Brachycera genera Taxa named by Jacques-Marie-Frangile Bigot Diptera of South America Endemic fauna of Chile Monotypic Brachycera genera Arthropods of Chile