Ditomyiidae (Edwards, 1921)

Barahona-Segovia, Rodrigo M., Madriz, Isaí, González, Christian R. & Amorim, Dalton De Souza, 2024, An update on the knowledge and general understanding of the Chilean Diptera diversity, Zootaxa 5518 (1), pp. 1-87 : 12

Ditomyiidae

The Ditomyiidae comprises over 100 extant species, grouped into two subfamilies and eight genera ( Falaschi & Amorim 2009). Munroe (1974) published a large monograph covering the Holarctic genus Symmerus and the austral genus Australosymmerus Freeman , which is a later genus with eight subgenera. Papavero (1977) published a catalog for the family in the Neotropical Region but unfortunately missed Munroe’s (1974) paper. In Chile there are ten species divided among two genera: Nervijuncta Marshall and Australosymmerus Freeman. Nervijuncta species are found in New Zealand, Chile, and southern Brazil. The Chilean species Nervijuncta conjuncta (Freeman) was redescribed by Falaschi & Amorim (2009). The subgenera Australosymmerus (Australosymmerus) Freeman and A. (Crionisca) Colless are shared between Chile and Australia, while the subgenera A. (Areostylus) Munroe, A. ( Tantrus ) Munroe, A. ( Melosymmerus ) Munroe and A. ( Calosymmerus ) Munroe are known only from South America. Of these subgenera, A. (Areostylus) Munroe and A. ( Tantrus ) Munroe are known from Chile, whereas the other subgenera are known from the northern areas of South America. Nine of the ditomyiid species of Australosymmerus occur in Chile, assigned to the following subgenera: one in A. ( Australosymmerus ), one in A. (Crionisca), four in A. (Areostylus), and three in A. (Velliocauda).