Nearctic Anthomyzidae: a monograph of Anthomyza and allied genera (Diptera) Author Roháćek, Jindřich Author Barber, Kevin N. text Acta Entomologica Musei Nationalis Pragae 2016 suppl. 2016-12-30 56 1 412 journal article 9539 10.5281/zenodo.4272829 e8b0cf7e-6ff3-40d9-8e92-87e099b9cefe 0374-1036 4272829 urn:lsid:zoobank.org:pub:E95E58A5-E0F1-4237-9D7C-4A81BB3120DD The Anthomyza pallida group The Anthomyza pallida group was established by ROHÁĆEK (2006a , 2009b ), originally for two Palaearctic species, A. pallida ( Zetterstedt, 1838 ) and A. dissors Collin, 1944 . According to ROHÁĆEK (2009a : Fig. 141 ), the monophyly of this group is well supported and has recently been connrmed by analysis of molecular data ( ROHÁĆEK & TÓTHOVÁ 2014 : Fig. 1 ). However, because six more species belonging to this group have been recognized in the Nearctic Region, the diagnosis of the A. pallida group is modined as follows: (1) male f 3 with a series of shortened and thickened setae in distal part of posteroventral row; (2) pregonite with distinctive anterior tooth; (3) phallapodeme with fulcrum arising very near its apex; (4) saccus prolonged, with long membranous distal part; (5) nlum with subterminal widening or tooth; (6) female genital chamber with annular sclerite situated more or less in front of posterior sclerites; (7) spermatheca with distinct terminal invagination. At present, the group includes 8 species: the Palaearctic A. pallida and A. dissors , and the Nearctic A. pengellyi sp. nov. , A. mcalpinei sp. nov. , A. pullinotum sp. nov. , A. concolor (Thomson, 1869) , A. occidentalis sp. nov. and A. vockerothi sp. nov. These can further be classined under three subgroups, viz. the A. pallida (s. str.) subgroup ( A. pallida and A. pengellyi ), the A. dissors subgroup ( A. dissors , A. mcalpinei and A. pullinotum ) and the A. concolor subgroup comprising only Nearctic species ( A. concolor , A. occidentalis and A. vockerothi ). These subgroups are characterized below in the discussion under A. pengellyi , A. mcalpinei and A. concolor , respectively. While the monophyly of each subgroup is well supported by apomorphic characters, their interrelationships are not so distinct, although the A. pallida subgroup and A. dissors subgroup are likely sister groups, supported by the following synapomorphies: distiphallus with nlum having a distinct dorsal, subterminal tooth or lobelike dilation; female genital chamber with annular sclerite situated distinctly more anteriorly (with respect to other internal sclerites) than in the A. concolor subgroup.