Quametopia gen. n. is established on the basis of recent phylogenetic analysis of taxa formerly assembled under the genus Mumetopia Melander, 1913 to include M. terminalis (Loew, 1863) and two new closely related Nearctic species of Anthomyzidae. The new genus is diagnosed and its phylogenetic relationships discussed. Quametopia terminalis (Loew, 1863) comb. n. is transferred from Mumetopia and redescribed based on revision of the type material (lectotypes of Anthophilina terminalis Loew, 1863 and its synonym Mumetopia nitens Melander, 1913 are designated) and other extensive material. Quametopia clintonia sp. n. and Q. amplistylus sp. n. (both from Canada, USA) are described and relationships of all three Quametopia species discussed. Immature stages of Q. terminalis and Q. clintonia sp. n. obtained by means of adult-to-adult rearing are described (1st- and 2nd-instar larvae for the first time in the family Anthomyzidae) and illustrated. Keys to adults, eggs, larvae and puparia of Quametopia species are presented. Biology (habitat and host-plant associations, life history) of Q. terminalis and Q. clintonia sp. n. are studied in detail and their ecological separation demonstrated. Distribution of all Quametopia species is reviewed. and Jindřich Roháček, Kevin N. Barber.
Taxonomic limits of the family Anthomyzidae are prescribed. Two fossil genera are affirmed, viz. Protanthomyza Hennig, 1965 (Baltic amber) and Grimalantha gen. n. (type species: G. vulnerata sp. n.) described from Dominican amber. Fourteen extant genera are recognized, including Chamaebosca Speiser, 1903 (= Penquistus Kieffer, 1906 syn. n.) and Apterosepsis Richards, 1962. New diagnoses of the latter two genera and redescriptions of their type species are given and their relationships are discussed. Chamaebosca cursor (Kieffer, 1906) becomes a new combination. The monotypic genus Echidnocephalodes Sabrosky, 1980 is removed from Anthomyzidae, newly diagnosed and its type species E. barbatus (Lamb, 1914) redescribed and a lectotype designated. Echidnocephalodes is considered to be related to Periscelididae and/or Aulacigastridae, particularly to those genera with symmetrical male postabdomen. The inferred phylogeny of the Anthomyzidae, based on cladistic analysis, is presented. The Opomyzidae are confirmed as a sister-group of the Anthomyzidae, while Protanthomyza is found to be the most primi tive anthomyzid genus forming a sister-group to all recent genera plus the fossil Grimalantha gen. n. The monophylies of the latter group of genera, and of the Anthomyzidae as a whole, are demonstrated. The genus Protanthomyza is classified in a new subfamily Protanthomyzinae, and all remaining genera are placed in the subfamily Anthomyzinae Frey, 1921. An annotated world checklist of the family Anthomyzidae is appended.