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 Key to identincation of the Nearctic species of the Anthomyza tschirnhausi group 1 Male . ........................................................................................................................... 2 – Female. ........................................................................................................................ 3 2(1) Gonostylus (in widest extension view, Figs 466 , 473 , 508, 509 ) with anterior margin distinctly convex. Thorax less densely grey to greyish brown microtomentose ( Fig. 481 ) and with mesonotum usually subshining anteriorly. ............ A. shewelli sp. nov. – Gonostylus (in widest extension view, Figs 493 , 510–512 ) with anterior margin concave to almost straight. Thorax with dense grey microtomentum ( Fig. 483 ), often with some bluish tinge (including mesonotum anteriorly). ............. A. gilviventris sp. nov. 3(1) T7+S7 entirely orange yellow to pale orange brown, sometimes with only a very narrow diffuse darkening on posterior margin and small brown marks on anterolateral lobes, OR only dorsolaterally narrowly brownish-darkened at posterior margin and ventrally with distinct and contrasting dark brown anterolateral lobes ( Figs 484 , 496 , 517). ........................................................................... A. gilviventris sp. nov. (in part) – T7+S7 dorsolaterally with at least posterior quarter ( Figs 458 , 474 ), largely ( Fig. 515 ) to entirely ( Figs 482 , 502 ) dark brown, never as above. ............................................ 4 4(3) Spermathecae relatively large, the larger one 0.9–1.2 times as long as medial length of S10, usually more elongately ovoid and with sparsely striated surface ( Figs 479, 480 ). T7+S7 with microtomentose area below 7th spiracle unpigmented, narrowly depressed and usually separated from dorsal darker part by a more or less distinct lateral ridge (Fig. 516). Thorax usually less densely grey to greyish brown microtomentose (as in Fig. 481 ) and with mesonotum usually subshining anteriorly ( Figs 2 , 458 ). ................ ...................................................................................................... A. shewelli sp. nov. – Spermathecae relatively small, 0.6–0.8 times as long as medial length of S10, usually more broadly ovoid and with more densely striated surface ( Figs 494, 498 , 501, 505 , 514 ). T7+S7 with microtomentose area below 7th spiracle pale- to dark-pigmented, nat, usually without lateral ridge (Fig. 517). Thorax with dense grey (often with some bluish tinge) microtomentum and, including mesonotum anteriorly, almost dull ( Figs 482, 484 ). ................................................................... A. gilviventris sp. nov. (in part)