Two new species of Ulmeritoides Traver (Ephemeroptera: Leptophlebiidae) from Southeastern Brazil Author Souto, Paula Malaquias Author Da-Silva, Elidiomar Ribeiro Author Nessimian, Jorge Luiz Author Gonçalves, Inês Corrêa text Zootaxa 2016 4078 1 127 136 journal article 46816 10.11646/zootaxa.4078.1.11 4649cba5-233d-4010-b0f4-062b26ac299f 1175-5326 263491 584BBD6C-265A-4F23-9634-B441DCDE533D Key to the genera Ulmeritoides and Ulmeritus (modified from Salles & Domínguez 2012 ) The key to male imagos of Ulmeritoides and Ulmeritus presented by Salles & Domínguez (2012) was modified to include the two new species here described and Ulmeritoides passorum Gama Neto & Hamada, 2014 , as below. 1. Vein Sc of hind wings 9/10 length of wing; membrane of wings with dark maculae at cross veins (fig. 2 in Domínguez 1991 ); apex of each penis round, lobe with ventral digitiform projection (fig. 3 in Domínguez 1991 )................ 2 Ulmeritus 1’. Vein Sc of hind wings 8/10 or less length of wing ( Figs 6 , 17 ); membrane of wings without color pattern, except in costal area; penis lobes without digitiform projections ( Figs 8 , 19 )............................................. 4 Ulmeritoides 2(1). Cross veins of hind wings few (around 20); maculae only around subcostal cross veins............ Ulmeritus saopaulensis 2’. Cross veins of hind wings numerous (33 to 50); maculae around all cross veins..................................... 3 3(2’). Maculae of fore wings forming bands (fig. 199A in Domínguez et al . 2006 ); ventral prolongation of penes short, approxi- mately as long as wide (fig. 199C Domínguez et al. 2006 )...................................... Ulmeritus balteatus 3’. Maculae of fore wings not forming bands (fig. 199E in Domínguez et al. 2006 ); ventral prolongation of penes long, approxi- mately twice as long as wide (fig. 199G in Domínguez et al. 2006 ).............................. Ulmeritus carbonelli 4(1’). Fore wings with costal and subcostal areas tinged with brown.................................................. 5 4’. Fore wings with costal and subcostal areas hyaline.......................................................... 12 5(4). Penis lobes with apex rounded ( Figs 8–9 ; see also figs 5–8 in Avila & Flowers 2005 )................................ 6 5’. Penis lobes with apex straight (figs 8, 19 in Salles & Domínguez 2012 ) or slightly concave ( Figs 13–14 )................ 9 6(5). Penis lobes with a ventral keel (figs 5–8 in Avila & Flowers 2005 )............................................... 7 6’. Penis lobes without a ventral keel and with a central spine ( Fig. 9 )........................ Ulmeritoides angelus sp. nov. 7 (6). Ventral keel of penis lobe located near apex (figs 9F–G in Domínguez 1995 )...................... Ulmeritoides tifferae 7’. Ventral keel of penis lobe located on median length (figs. 5–8 in Avila & Flowers 2005 )............................ 8 8(7’). Abdomen translucent yellowish brown, lacking pattern of pale spots or dark bands............... Ulmeritoides chavarriae 8’. Abdominal terga orange-brown with pale basal spots and dark brown apical transverse spots........... Ulmeritoides acosa 9(5’). Basal broad region of forceps almost 1/4 length of segment I ( Fig. 13 , also fig. 196N in Domínguez et al. 2006 )......... 10 9’. Basal broad region of forceps about 1/6 length of segment I (figs 7, 18 in Salles & Domínguez 2012 ).................. 11 10(9). Abdominal terga brown shaded with dark brown, with posterior margins darker and median line dark brown ( Fig. 3 )..................................................................................... Ulmeritoides tamoio sp. nov. 10’. Abdominal terga yellowish-brown, with posterior margins darker, median line absent (fig. 196P in Domínguez et al. 2006 )....................................................................................... Ulmeritoides huitoto 11(9’). Penes with apex ending in an inner acute pointed projection (figs 8F–G in Domínguez 1995 )....... Ulmeritoides misionensis 11’. Inner projection of penes rounded, outer corner with a small ventral spine (fig. 7C in Domínguez 1995 ). Ulmeritoides haarupi 12(4’). Apex of penis lobes rounded............................................................................ 13 12’. Apex of penis lobes not rounded......................................................................... 14 13(12). Each penis lobe cylindrical without a ventral keel ( Fig. 4 F in Domínguez 1995 ).................................. 17 13’. Each penis lobe flattened and with a ventral keel ( Fig. 12 G in Domínguez 1995 )................ Ulmeritoides guanacaste 14(12’). Penes lobes with several small apical spines ( Fig. 6 D in Domínguez 1995 )................... Ulmeritoides spinulipenis 14’. Penis lobes with inner apical margin ending in an acute projection.............................................. 15 15(14’). Abdominal color pattern with conspicuous lighter rounded marks.......................... Ulmeritoides uruguayensis 15’. Abdominal color pattern never as above................................................................... 16 16(15’). Bulla not surrounded with black mark (fig. 5a in Salles & Domínguez 2012 ).................... Ulmeritoides araponga 16’. Bulla surrounded with black mark (fig. 16a in Salles & Domínguez 2012 )...................... Ulmeritoides nigribullae 17(13). Each penis lobe with a lateral groove (fig. 4F in Domínguez 1995 )........................... Ulmeritoides flavopedes 17’. Penes lobes without lateral groove, apex of posterior scutal protuberance with a yellowish transversal line (fig. 14 in Neto & Hamada 2014 )...................................................................... Ulmeritoides passorum