Phylogeny of the Mycetophiliformia, with proposal of the subfamilies Heterotrichinae, Ohakuneinae, and Chiletrichinae for the Rangomaramidae (Diptera, Bibionomorpha) Author DE SOUZA AMORIM, DALTON Author RINDAL, EIRIK text Zootaxa 2007 2007-07-30 1535 1 1 92 http://dx.doi.org/10.11646/zootaxa.1535.1.1 journal article 10.11646/zootaxa.1535.1.1 1175­5334 5088515 8E7D8F88-E564-423C-922B-C7098D06125F Eratomyia , n. gen. ( Figs. 7–15 ) Type species. Eratomyia magnifica sp. n. , here designated Diagnosis. First sector of m-cu longer than in other genera of subfamily, m-cu reaching CuA more distally. M 1+2 /M 3+4 shorter than m-cu, r-m long. Tergites 1-4 and 6 shining brown, tergite 5 yellow. Midpleural pit absent. Etymology. The species name is feminine, from the Greek eratos , lovely, meaning a lovely fly. Comments. This genus, which is known only from the type species, from Ecuador , appears in the phylogenetic analysis (below) as the sister group of Chiletricha , which is known from Chile , southern Argentina , and southern Brazil . It differs from the Chiletricha species in wing features, with a much wider basal cell, R 5 separated from C, and M 4 originating from CuA not as basally in the wing ( Figs. 10 , 16 ). Mouthparts are fairly similar ( Figs. 7 , 17 ). In the thorax, the mesepimeron of Eratomyia is more slender on its ventral half, whereas the laterotergite is slightly larger ( Figs. 8 , 18 ). Tergite 9 has strong spines on a pair of distal projections ( Fig. 12–15 ), as also seen in Chiletricha ( Fig. 19 ), Rhynchoheterotricha , and Insulatricha , and the gonocoxites have a pair of unique digitiform projections bearing setae and a pair of spines.