Identified from the following estimation: No gills, 1oth sternum well developed (picture 3), Tarsi with two basal segments sub-equal and much shorter than the third segment (picture 5), last segment of maxillary palp normal - more than one-quarter as wide as the preceding segment (picture 4), only abdominal segments 1 and 2 divided into term and sternum - segments 3 and 4 fused into a complete ring (picture 1), paraprocts long and pointed (picture 3), the color-marks of the head resembles that of Isoperla difformis (picture 2).