Mycomya pongo
Mycomya pongo belongs to the subgenus Mycomyopsis. It differs from the other species of the subgenus Mycomyopsis in the shape and reduced setosity of its very long and slender tergal lateral appendage. It slightly resembles that found in the Nepalese M. sanar Väisänen (2013c: figs. 14A–F), which is also lacking the sternal submedian filament and the spur of the gonostylus like M. pongo. However, M. sanar has a group of setae at the base of the tergal lateral appendage, in addition to the groups of setae in front of the tergal combs between the outer tergal comb and the base of the tergal lateral appendage (Väisänen 2013a: figs. 14A, 14D). Its gonostylus (Väisänen 2013c: fig. 14E) is short and wide (about 4x as long as its width), with a strong spine slightly beyond the middle part of the gonostylus, three subapical teeth, and a short membranous lateral lobe (about 1/3 of the length of the gonostylus), whereas M. pongo has a longer gonostylus (about 8x as long as its width) without a middle spine and with a membranous lateral lobe about as long as the main branch of the gonostylus. The structure and setosity of the apical part of the tergal lateral appendage is quite unique in M. pongo, somewhat resembling that of the New Caledonian M. minuscula Matile (1991: figs. 2 and 4), which has several setae in the middle part of its tergal lateral appendage.
Vaisanen, 2014
After Vaisanen, 2014