Family ID: Long antenna (visible in Figure 1), minnow shaped body and notched labrum (visible in Figure 5)
Genus ID: Several dense tufts of setae present on the right mandible between the prostheca and molar (Figure 3), no well developed medially projecting corner on the labial palps (Figure 6), darker "veins" present within the gills (Figure 4).
Species ID: Fallceon quilleri is the only known species of Fallceon in Colorado.