The Dixa inextricata Dyar & Shannon (Diptera: Dixidae) species group, with two new cryptic species from the eastern Nearctic Region Author Moulton, John K. text Zootaxa 2016 4121 4 458 472 journal article 38894 10.11646/zootaxa.4121.4.6 4247868c-80b8-43b6-9ef7-7feced83afe1 1175-5326 265286 F15F9CC4-A5CE-45D9-94F7-7C112AE71544 Key to males of D. inextricata group 1 Cercus acute apically, its length subequal to or greater than proctiger lateral width ( Figs 10 , 15, 17 ). Ventral margin of gonostylus bulbous ( Fig. 10 ). Basal gonocoxal lobe rectangular in ventral view ( Fig. 16 ), its apex strongly falcate in lateral view ( Figs 10 , 15 ). Apical gonocoxal lobe blunt, rounded in lateral view, not digitiform ( Figs 10 , 15 )............ calciphilum sp. nov. - Cercus blunt apically, its length ca. one-half that of proctiger lateral width ( Figs 9, 11 , 12, 18 ). Ventral margin of gonostylus not strongly bulbous convex ( Figs 9, 11 , 12, 18 ). Basal gonocoxal lobe digitiform in ventral view ( Figs 13, 19 ), its apex in lateral view subovoid-round, not strongly falcate ( Figs 9, 11 , 12, 18 ). Apical gonocoxal lobe digitiform ( Figs 9, 11 , 12, 18 ).... 2 2 Gonostylus less than 1.5X longer than greatest width in lateral view, with ventral margin slightly convex ( Figs 9 , 12 ). Basal gonocoxal lobe oval-round, directed dorsally............................................. appalachiensis sp. nov. - Gonostylus 2X longer than greatest width in lateral view, with ventral margin straight or slightly concave ( Figs 11 , 18 ). Basal gonocoxal lobe subovoid, directed posterodorsally, its distal margin indented slightly........................ inextricata