Metelasmus pseudopterus Coquillett, 1907: 292 Ectoparasite insects of bats from the fields and weedlands eco-region of Argentina Autino, Analía Gladys Idoeta, Fabricio Miguel Claps, Guillermo Luis Barquez, Rubén Marcos Papéis Avulsos de Zoologia 2020 2020-12-11 60 1 9 6RDK3 Coquillett, 1907 Coquillett 1907 [933,1429,1370,1395] Insecta Hippoboscidae Metelasmus Animalia Diptera 2 3 Arthropoda species pseudopterus      Metelasmus pseudopterus Coquillett, 1907: 292.   Material examined:  Misiones: Estancia Prates, Barra Concepción, 28°05′S, 55°32′W,  25.iii. 2011, 1 ♀( CMLA 717) and 1 ♂( CMLA 718) on  Artibeus fimbriatus ♀( FMI 271);   26.iii.2011, 3 ♂( CMLA 711, 712, 713) on  A. fimbriatus ♀( FMI 272);  Reserva Ecológica Tupá Puojhá(Fachinal), 27°37′S, 55°43′W,  21.xi.2010, 1 ♀( CMLA 714), 2 ♂( CMLA 715, 716) on  Eptesicus furinalis ♀( FMI 230).  Identification:  Metalasmus pseudopterusis easily recognizable by its bell-shaped head with a comb of closely spaced thick spines (ctenidium) along the posterior ventral margins. The ctenidium, consisting of numerous spines, extends dorsoventrally on the posterior margin of the head; broad scales (remiform scale) are present on the side of the head behind the ctenidium; and the wings are brachypterous, almost oval shaped, with only four longitudinal veins. Female: tergite VII with one pair of setae. Male: gonopod shorter; rapidly narrowing toward the hooked apex ( Guerrero, 1996; Autino et al.,1999; Graciolli & Carvalho, 2001).   Comments:This species parasitizes widely on bats of the family Phyllostomidae, although it has been cited for Emballonuridaeon  Peropteryx macrotis(Wagner, 1843)and for Vespertilionidaeon  Myotis nigricans(Schinz, 1821) (Vespertilionidae)( Graciolli & Carvalho, 2001). In northern Argentina,it has been recorded on  Artibeus fimbriatus(Misiones)(Claps et al.,2000; Autino et al.,2009) and  A. planirostris( Jujuy, Saltaand Tucumán) (Autino et al.,1999, 2009). 2011-03-25 CMLA, FMI -28.083334 Barra 1233 -55.533333 Estancia Prates 2 3 CMLA 717, CMLA 718, FMI 271 3 2 1 Misiones 2011-03-26 CMLA, FMI 2 3 CMLA 711, 712, 713, FMI 272 4 1 3 Misiones 2010-11-21 CMLA, FMI -27.616667 Reserva Ecologica Tupa Puojha 1236 -55.716667 2 3 CMLA 714, CMLA 715, 716, FMI 230 4 2 2 Misiones