Eupera troglobia shell SEM images of paratypes 153866 7 specimen #7, both valves connected, opened ~120°, ventral view 8 #7, left valve, inner left view 9 #7, right valve, inner left view 10 #7, left valve, detail of hinge region, inner left view 11 #7, right valve, detail of hinge region, inner right view 12 specimen #8, left valve, outer left view 13 same, detail of surface on middle region of ventral edge. Scale bars: 500 µm (7, 12), 300 µm (8), 200 µm (10, 13).