Polycelis sierrensis Kenk, 1973 | Sep 23, 1967 | | | spring near Sagehen Creek Biological Station, tributary of Sagehen Creek, furnishing water to the station. Situated about 2 miles west of State Road 89, north of Truckee, water clear, fast, temperature 6.3 degrees C., pH 7.5 under stones, 3 specimen |
Polycelis sierrensis Kenk, 1973 | Jul 10, 1968 | | | temperature 6.5 degrees C., pH 7.5, oxygen 10 ppm, many specimens under stones, some mature. |
Polycelis sierrensis Kenk, 1973 | May 28-29, 1970 | | | temperature 6.3 degrees C., pH 7.5, oxygen 9 ppm, about 50 Polycelis under stones and on bait (beef liver) exposed over night, some mature. |
Phagocata crenophila Carpenter, 1969 | May 28-29, 1970 | | | temperature 6.3 degrees C., pH 7.5, oxygen 9 ppm, numerous Polycelis, less numerous this species. |