A redefinition of Paragrallomyia Hendel (Diptera: Micropezidae, Taeniapterinae) and a revision of the P. albibasis complex Author Ferro, Gustavo Borges 0000-0003-2091-0872 School of Environmental Sciences, University of Guelph, Guelph, ON, Canada, N 1 G 2 W 1. & bferrog @ gmail. com; https: // orcid. org / 0000 - 0003 - 2091 - 0872 bferrog@gmail.com Author Marshall, Stephen A. 0000-0002-5732-9718 School of Environmental Sciences, University of Guelph, Guelph, ON, Canada, N 1 G 2 W 1. & samarsha @ uoguelph. ca; https: // orcid. org / 0000 - 0002 - 5732 - 9718 samarsha@uoguelph.ca text Zootaxa 2020 2020-08-04 4822 1 39 70 journal article 8753 10.11646/zootaxa.4822.1.2 d073f599-4282-4f4b-a071-5120d1a4af1e 1175-5326 4401190 F2D5A199-48B1-448A-9B9A-458FBFB5253D Key to species in the Paragrallomyia albibasis complex 1) Cell r 4+5 closed at wing margin ( Fig. 55 ). Anterior half of postpronotal lobe with three to four strong black setae ( Figs. 53, 55 ).............................................................. Paragrallomyia vulpes (Cresson) Costa Rica - Cell r 4+5 open at wing margin ( Fig. 1 ). Anterior half of postpronotal lobe bare or with a dense row of five or more long black setae............................................................................................... 2 2) Epicephala merging immediately behind ocellar plate, postocellar part of frontal vitta thus short and abruptly tapered to a point anterior to postocellar setae ( Figs. 4 , 31 , 39 , 49 )............................................................. 3 - Epicephala converging but not immediately merging near the ocellar plate, postocellar part of frontal vitta thus reaching postocellar setae ( Figs. 6 , 15 , 17 )............................................................................. 7 3) Frontal vitta with a velvety black spot anterior to ocellar plate ( Figs. 31 , 39 , 49 ).................................... 4 - Frontal vitta darkened, without rounded black velvety spot ( Figs. 4 , 20 ).......................................... 6 4) Epicephalon somewhat elevated above level of fronto-orbital plate ( Fig. 49 ). Copulatory fork with short quadrate inner basal lobes, less than twice as long as wide ( Fig. 52 )... Paragrallomyia thiemei (Enderlein) Bolivia , Brazil , Colombia , Costa Rica , Ecuador , French Guiana, Guiana , Peru , Venezuela . - Epicephalon flat, about same level as fronto-orbital plate ( Figs. 31, 33 ). Copulatory fork with long apically rounded inner basal lobes, more than three times as long as wide ( Figs. 34 , 42 )..................................................... 5 5) Rounded black velvety spot on frontal vitta swollen ( Fig. 33 ). Ejaculatory apodeme large, blade wider than sperm pump ( Fig. 34 )............................................................... Paragrallomyia nodulosa n. sp. Costa Rica - Rounded black velvety spot on frontal vitta flat ( Fig. 41 ). Ejaculatory apodeme small, sperm pump wider than blade ( Fig. 42 ).................................................................. Paragrallomyia quadrifurca n. sp. Panama 6) Epicephalon somewhat elevated above frontal vitta level ( Fig. 20 ). Copulatory fork with developed inner basal lobes, lobes less than half as long as the posterior ones ( Fig. 23 )........................... Paragrallomyia colombiana n. sp. Colombia - Epicephalon flat, about same level as frontal vitta ( Fig. 4 ). Copulatory fork with small quadrate inner basal lobes ( Fig. 5 )............................................................ Paragrallomyia aequorea n. sp. (male only) Colombia 7) Mid and hind tibiae flattened, sulcus on outer face strongly pronounced and curved ( Figs. 24 , 37 )...................... 8 - Mid and hind tibiae cylindrical or nearly so, sulcus on outer face weak or absent ( Figs. 18 , 45 )....................... 10 8) Frontal vitta brown or dark brown, without black spot anterior to ocellar plate ( Fig. 27 ). Fronto-orbital plate orange brown...................................................... Paragrallomyia ecuadoriensis n. sp. Ecuador . (female only) - Frontal vitta with a black spot anterior to ocellar plate ( Figs. 25 , 35 ). Fronto-orbital plate brown or dark brown........... 9 9) Thorax uniformly blackish. Abdominal tergites dark brown/black. Relatively large, body length 7–8 mm ............................................................................. Paragrallomyia pseudoalbibasis n. sp. Costa Rica - Thorax brown laterally, black on mesonotum only. Abdominal tergites brown. Relatively small, body length 4–5 mm ............................................................. Paragrallomyia diminuta n. sp. Costa Rica (female only) 10) Frontal vitta orange brown or dark brown, uniformly pigmented ( Fig. 15 , 17 )..................................... 11 - Frontal vitta colour variable, but always with a black spot anterior to ocellar plate................................. 12 11) Frontal vitta and postpronotal lobe orange-brown ( Fig. 17 ). Female cervical sclerite with a white rounded swelling. Paired spermathecal duct stems thin and with spine-like processes on apical half, duct no more than half as wide as one of the paired spermatheca. Paired spermatheca oval and with sparse micro finger-like processes ( Fig. 19 ). Single spermatheca broad basally, tapered apically and covered by small spine-like appendices........ Paragrallomyia citrina n. sp. Costa Rica (female only) - Frontal vitta and postpronotal lobe dark brown ( Fig. 15 ). Female cervical sclerite smooth, without swelling. Paired spermathecal duct stems smooth and heavily swollen in the middle, swelling about same width as paired spermatheca ( Fig. 16 ). Paired spermathecae oval and smooth. Single spermatheca cylindrical and smooth, without spine-like processes........................................................................ Paragrallomyia caliensis n. sp. Colombia (female only) 12) Black spot anterior to ocellar plate strong and teardrop shaped ( Fig. 47 ).................................................................................................... Paragrallomyia teresacristinae (Albuquerque) Brazil - Black spot anterior to ocellar plate rounded and sometimes weak.............................................. 13 13) Epicephalon flat, about same level as fronto-orbital plate. Mesonotum with two rows of long black setae on postpronotal lobe margin ( Fig. 29 )............................................. Paragrallomyia inpai (Albuquerque) Brazil , Bolivia - Epicephalon somewhat swollen, above level of fronto-orbital plate ( Figs. 43 ). Margin of postpronotal lobe margin bare or with sparse and small dark microsetulae...................................................................... 14 14) Cervical sclerite with a brownish rounded swelling in both sexes. Four spermathecae ( Fig. 44 )........................................................................................... Paragrallomyia quaternaria n. sp. Bolivia - Cervical sclerite smooth or with a small oval white swelling (female unknown for P. bifurcata ). Known females with three spermathecae ( Figs. 7 , 11 , 13 ).......................................................................... 15 15) Female cervical sclerite smooth, without swelling and covered by white pruinosity. Fronto-orbital plate yellowish-brown ( Figs. 12, 14 ).............................................................. Paragrallomyia brasiliensis n. sp. Brazil - Female cervical sclerite with a white opaque oval swelling. Fronto-orbital plate dark brown ( Figs. 6, 8 , 10 )............. 16 16) Pleural membrane greyish with a white vertical stripe on P3 ( Fig. 6, 8 ). Single spermatheca cylindrical with small finger-like processes ( Fig. 7 )......................... Paragrallomyia albibasis (Enderlein) Belize , Colombia , Costa Rica , Mexico - Pleural membrane uniformly darkened ( Fig. 10 ). Single spermatheca forked and smooth, with small rounded swellings ( Fig. 11 ).................................................... Paragrallomyia bifurcata n. sp. Costa Rica (female only)