| Catenula turgida (Zacharias, 1902) | prior to 1987 |  |  | interstitial, 1 specimen found in a stream,  13 specimens found in springs. | 
| Bothrioplana semperi Braun, 1881 | prior to 1987 |  |  | dominant species in the interstitial fauna.  10 species from stream surface sediments, and 113 from interstitial waters. | 
| Catenula lemnae Duges, 1832 | prior to 1987 |  |  | interstitial, 6 specimens. | 
| Rhynchoscolex simplex Leidy, 1852 | prior to 1987 |  |  | 1 specimen in a stream, 42 specimens interstitial, and 8 specimens from springs. | 
| Anokkostenostomum anatirostrum (Marcus, 1945) | prior to 1987 |  |  | 3 specimens interstitial, and 3 specimens from springs. | 
| Stenostomum beauchampi Papi, 1967 | prior to 1987 |  |  | 2 specimens from stream surface sediments. | 
| Stenostomum brevipharyngium Kepner & Carter, 1931 | prior to 1987 |  |  | 12 specimens from stream surface sediments. | 
| Stenostomum grande Child, 1902 | prior to 1987 |  |  | 32 specimens from stream surface sediments. | 
| Stenostomum kepneri Nuttycombe & Waters, 1938 | prior to 1987 |  |  | 2 specimens from interstitial waters. | 
| Stenostomum leucops (Duges, 1828) | prior to 1987 |  |  | 718 specimens from stream surface sediments, 32 specimens from interstitial waters, and 72 specimens from springs. | 
| Stenostomum occultum Kolasa, 1971 | prior to 1987 |  |  | 113 specimens from stream surface sediments, 26 specimens from interstitial waters, and 3 specimens from springs. | 
| Anokkostenostomum pegephilum (Nuttycombe & Waters, 1938) | prior to 1987 |  |  | 10 specimens from stream surface sediments, 9 specimens from interstitial waters, and 6 specimens from springs. | 
| Stenostomum predatorium Kepner & Carter, 1931 | prior to 1987 |  |  | 18 specimens from stream surface sediments, 5 specimens from interstitial waters. | 
| Stenostomum temporaneum Kolasa, 1981 | prior to 1987 |  |  | 7 specimens from stream surface sediments. | 
| Stenostomum unicolor Schmidt, 1848 | prior to 1987 |  |  | 397 specimens from stream surface sediments, 12 specimens from interstitial waters. | 
| Stenostomum sp. Ferguson & Jones, 1949 | prior to 1987 |  |  | 4 specimens from stream surface sediments, 9 specimens from interstitial waters, and 4 specimens from springs. | 
| Macrostomum sp. Steinbock, 1931 | prior to 1987 |  |  | 20 specimens from stream surface sediments, 33 specimens from interstitial waters, and 8 specimens from springs.  Representing 2 species( spp 1 and spp 2). | 
| Microstomum lineare (Müller, 1773) | prior to 1987 |  |  | 16 specimens from stream surface sediments, and 1 specimen from springs. | 
| Geocentrophora sphyrocephala de Man, 1876 | prior to 1987 |  |  | 2 specimens from springs. | 
| Prorhynchus stagnalis Schultze, 1851 | prior to 1987 |  |  | 2 specimens from stream surface sediments, 35 specimens from interstitial waters, and 5 specimens from springs. | 
| Castrada (Castrada) sp. Kolasa et al, 1987 | prior to 1987 |  |  | 3 specimens from stream surface sediments. | 
| Olisthanella sp. Kolasa et. al., 1987 | prior to 1987 |  |  | 1 specimen from stream surface sediments. | 
| Phaenocora sp. Kolasa, Strayer, & Bannon-O'Donnell, 1987 | prior to 1987 |  |  | 2 specimens from stream surface sediments, 2 specimens from interstitial waters. | 
| Strongylostoma elongatum Hofsten N, 1907 | prior to 1987 |  |  | 1 specimen from interstitial waters. | 
| Gyratrix hermaphroditus Ehrenberg, 1831 | prior to 1987 |  |  | 13 specimens from interstitial waters. |