1136091-RS SDMS

Summary of the benthic macroinvertebrates collected at sampling locations in proposed Segments 3a, 4a, and 4b of the upper Animas River, 1994. Total Total area density/ Total # #of # of # of Site Rep Order Family Genus Species # abundance sq. meter Taxa Ephemer plecop tricop HAR1 1 Ephemeroptera Baetidae Baetis bicaudatus 15 HAR1 1 Ephemeroptera Heptageniidae Rithrogena robusta 15 HAR1 1 Ephemeroptera Heptageniidae Epeorus albertae 9 HAR1 1 Plecoptera Nemouridae Zapada 5 HAR1 1 Plecoptera Chloroperlidae Sweltsa 4 HAR1 1 Trichoptera Arctopsychidae Arctopsyche grandis 2 HAR1 1 Trichoptera Rhyacophilidae Rhyacophilia hyalinata 1 51.0 0.1 403.3 HAR1 2 Ephemeroptera Baetidae Baetis bicaudatus 19 HAR1 2 Ephemeroptera Heptageniidae RIgthogena robusta 31 HAR1 2 Ephemeroptera Heptageniidae Epeorus albertae 3 HAR1 2 Ephemeroptera Ephemerellidae Ephemerella coloradensis 1 HAR1 2 Plecoptera Nemouridae Zapada 4 HAR1 2 Plecoptera Perlodidae Megarcys signata 1 HAR1 2 Plecoptera Chloroperlidae 1 HAR1 2 Diptera Chironomidae Orthocladiinae 1 61.0 0.1 482.4 HAR1 3 Ephemeroptera Heptageniidae Epeorus albertae 14 HAR1 3 Ephemeroptera Heptageniidae Rithrogena robusta 21 HAR1 3 Ephemeroptera Ephemerellidae Drunella doddsi 1 HAR1 3 Ephemeroptera Ephemerellidae Ephemerella coloradensis 1 HAR1 3 Ephemeroptera Baetidae Baetis bicaudatus 40 HAR1 3 Plecoptera Nemouridae Zapada 5 HAR1 3 Diptera Chironomidae Orthocladiinae 2 84.0 0.1 664.3 7 5 1 0 Mean 65.3 516.7 7.3 4.0 2.0 0,7 SD 16.9 133.8 0.6 1.0 1,0 1,2

HAR2 1 Ephemeroptera Baetidae Baetis bicaudatus 20 HAR2 1 Ephemeroptera Ephemerellidae Ephemerella coloradensis 1 HAR2 1 Ephemeroptera Heptageniidae Epeorus albertae 17 HAR2 1 Ephemeroptera Heptageniidae Cinygmula 1 HAR2 1 Plecoptera Nemouridae Zapada 7 HAR2 1 Plecoptera Perlodidae Isoperla 1 HAR2 1 Trichoptera Uenoidae Oligophlebodes 2 HAR2 1 Diptera Choronimidae Orthocladiinae 1 HAR2 1 Tricladida Planariidae 1 51.0 0.1 403.3 HAR2 2 Ephemeroptera Baetidae Baetis bicaudatus 13 HAR2 2 Ephemeroptera Heptagoniidae Epeorus albertae 3 HAR2 2 Ephemeroptera Heptageniidae Rithrogena robusta 4 HAR2 2 Diptera Dixidae Dixa 1 HAR2 2 Diptera Chironomidae Orthocladiinae orthocladius 3 24.0 0.1 189.8 HAR2 3 Ephemeroptera Ephemerellidae Drunella doddsi 3 HAR2 3 Ephemeroptera Baetidae Baetis bicaudatus 9 Summary of the benthic macroinvertebrates collected at sampling locations In propoaed Segments 3a, 4a, and 4b of the upper Animas River, 1994. Total Total area density/ Total # #0f #0f #of Site Rep Order Family Genus Species # abundance sq. meter Taxa Ephemer plecop tricop HAR2 3 Ephemeroptera Heptageniidae Epeorus albertae 2 HAR2 3 Ephemeroptera Heptageniidae Rithrogena robusta 20 HAR2 3 Plecoptera Nemouridae Zapada 1 HAR2 3 Diptera Chironomidae Orthocladiinae 1 36.0 0.1 284.7 6 4 1 0 Mean 37.0 292.6 6.7 3.7 1.0 0.3 SD 13.5 107.0 2.1 0.6 f.O 0.8

HAR3 Ephemeroptera Baetidae Baetis bicaudatus 22 HAR3 Ephemeroptera Heptageniidae Epeorus alberta 24 HAR3 Ephemeroptera Heptageniidae Rithrogena robusta 25 HAR3 Ephemeroptera Ephemerellidae Ephemerella coloradensis 2 HAR3 Plecoptera Nemouridae Zapada 6 HAR3 Plecoptera Chloroperlidae Sweltsa 1 HAR3 Trichoptera Arctopsychidae Arctopsyche grandis 3 HAR3 Trichoptera Rhyacophilidae Rhyacophilia hyalinata 1 HAR3 Diptera Chironimldae Orthocladiinae 1 85.0 0.1 672.2 9 4 2 2 HAR3 2 Ephemeroptera Baetidae Baetis bicaudatus 16 HAR3 2 Ephemeroptera Heptageniidae Epeorus albertae 21 HAR3 2 Ephemeroptera Heptageniidae Rithrogena robusta 30 HAR3 2 Plecoptera Nemouridae Zapada 7 HAR3 2 Plecoptera Chloroperlidae Sweltsa 2 HAR3 2 Trichoptera Arctopsychidae Arctopsyche grandis 1 HAR3 2 Trichoptera Uenoidae Oligophlebodes 1 78.0 0.1 616.8 7 3 2 2 HAR3 3 Ephemeroptera Baetidae Baetis bicaudatus 28 HAR3 3 Ephemeroptera Ephemerellidae Ephemerella coloradensis 7 HAR3 3 Ephemeroptera Ephemerellidae Drunella doddsi 1 HAR3 3 Ephemeroptera Heptageniidae Rithrogena robusta 5 HAR3 3 Ephemeroptera Heptageniidae Epeorus albertae 18 HAR3 3 Plecoptera Nemouridae Zapada 1 HAR3 3 Plecoptera Chloropertldae Sweltsa 2 HAR3 3 Plecoptera Periodidae Megarcys 1 HAR3 3 Plecoptera Rhyacophilidae Rhyacophila hyalinata 3 HAR3 3 Plecoptera Chloroperlidae Suwallia 2 HAR3 3 Diptera Simuliidae Prosimulium 1 69.0 0.1 545.7 11 5 4 1 Mean 77.3 611.6 9.0 4.0 2.7 1.7 SD 8.0 63.4 2.0 1.0 1.2 0.6

HAR4 1 Ephemeroptera Baetidae Baetis bicaudatus 38 HAR4 1 Ephemeroptera Heptageniidae Epeorus albertae 13 HAR4 1 Ephemeroptera Heptageniidae Rithrogena robusta 8 HAR4 1 Plecoptera Nemouridae Zapada 1 Summary of the benthic macroinvertebrates collected at sampling locations in proposed Segments 3a, 4a, and 4b of the upper Animas River, 1994. Total Total area density/ Total # #of # of # of Site Rep Order Family Genus Species # abundance sq. meter Taxa Ephemer plecop tricop HAR4 Plecoptera Periodidae Megarcys signata 2 HAR4 Trichoptera Rhyacophilidae Rhyacophila hyalinata 1 HAR4 Diptera Chironomidae Orthocladiinae 4 HAR4 Tricladida Planariidae 1 68.0 0.1 537.8 HAR4 Ephemeroptera Baetidae Baetis bicaudatus 91 HAR4 Ephemeroptera Heptageniidae Epeorus albertae 9 HAR4 Ephemeroptera Heptageniidae Rithrogena robusta 5 HAR4 Ephemeroptera Ephemerellidae Ephemerella coloradensis 1 HAR4 Plecoptera Nemouridae Zapada 2 HAR4 Plecoptera Chloroperildae Suwallia 1 HAR4 Plecoptera Chloroperildae Sweltsa 1 HAR4 Trichoptera Uenoidae Oligophlebodes 1 HAR4 Diptera Chironomidae Orthocladiinae 6 HAR4 Tricladida Planariidae 1 118.0 0.1 933.2 10 HAR4 Ephemeroptera Baetidae Baetis bicaudatus 75 HAR4 Ephemeroptera Heptageniidae Epeorus albertae 12 HAR4 Ephemeroptera Heptageniidae Rithrogena robusta 3 HAR4 Plecoptera Periodidae Megarcys 2 HAR4 Diptera Chironomidae Orthocladiinae 3 95.0 0.1 751.3 5 3 1 0 Mean 93.7 740.7 7.3 3.3 2.0 0.7 SD 25.0 197.9 2.5 0.6 1.0 0.6

AR1 all Tricoptera Arctopsychidae Arotops 1 ARI all Diptera Simuliidae prosimi 1 ARI all Plecoptera Nemouridae zapada 6 ARI all Ephemeroptera Baetidae Baetis bicaudatus 1 AR1 all Diptera 3 ARI ali Diptera Chironomidae 2 AR1 all Diptera 1 AR1 all Ostracoda 12 27.0 0.4 71.2 8 1 1 1 Mean 3.4 2.7 0.3 0.3 0.3 SD 3.9

AR2 1 Tricoptera Rhyacophilidae Rhyacophila 1 AR2 1 Tricoptera Arctopsychidae Arctopsyche grandis 1 AR2 1 Diptera Chironomidae orthocladiinae 1 AR2 1 Ephemeroptera Hepatagenidae Epeorus albertae 2 AR2 1 Plecoptera Nemouridae Zapada 2 AR2 1 Ostracoda 8 AR2 1 Trombiformes Hydracarina 1 16.0 0.1 126.5 AR2 2 Ephemeroptera Heptageniidae Epeorus albertae 1 Summary ofthe benthic macroinvertebrates collected at sampling locations in proposed Segments 3a, 4a, and 4b of the upper Animas River, 1994. Total Total area density/ Total # #of #of #of Site Rep Order Family Genus Species # abundance sq. meter Taxa Ephemer plecop tricop AR2 2 Diptera 1 AR2 2 Ostracoda 3 5.0 0.1 39.5 1 AR2 3 Tricoptera Arctopsychidae Arctopsyche grandis 1 AR2 3 Trombiformes Hydracarina 1 AR2 3 Diptera Tipullldae 1 AR2 3 Ostracoda 2 5.0 0.1 39.5 4 0 0 1 Mean 8.7 68.5 4.7 0.7 0.3 1.0 SD 6.4 50.2 2.1 0.6 0.6 1.0

AR3 1 Tricoptera Arctopsychidae Arctopsyche grandis 4 AR3 1 Diptera 1 5.0 0.1 39.5 AR3 2 Tricoptera Arctopsychidae Arctopsyche grandis 3 AR3 2 Ephemeroptera Baetidae 2 AR3 2 Ostracoda 1 6.0 0.1 47.4 3 1 0 1 AR3 3 Diptera 2 2.0 0.1 15.8 1 0 0 0 Mean 4.3 34.3 2.0 0.3 0.0 0.7 SD 2.1 16.5 1.0 0.6 0.0 0.6

AR4 1 Tricoptera Arctopsychidae Arctopsyche grandis 3 AR4 1 Diptera 2 5.0 0.1 39.5 AR4 2 Tricoptera Arctopsychidae Arctopsyche grandis 1 AR4 2 Ephemeroptera Baetidae Baetis bicaudatus 2 3.0 0.1 23.7 2 1 0 1 AR4 3 Tricoptera Arctopsychidae Arctopsyche 1 1.0 0.1 7.9 1 0 0 1 Mean 3.0 23.7 1.7 0.3 0.0 1.0 SD 2.0 15.8 0.6 0.6 0.0 0.0

AR5 1 0 0.0 0.1 0.0 0 0 0 0 AR5 2 Ephemeroptera Baetidae Baetis bicaudatus 1 1.0 0.1 7.9 1 1 0 0 AR5 3 Ephemeroptera Baetidae Baetis bicaudatus 1 AR5 3 Diptera Stratiomyidae Euparyphus 1 AR5 3 Diptera Ceratopognidae 1 3.0 0.1 23.7 3 1 0 0 Mean 1.3 10.5 1.3 0.7 0.0 0.0 SD 1.5 12.1 1.5 0.6 0.0 0.0

AR6 1 Ephemeroptera Heptageniidae Rithrogena robusta AR6 1 Ephemeroptera Baetidae Baetis bicaudatus AR6 1 Plecoptera Nemouridae Zapada AR6 1 Diptera 8.0 0.1 63.3 AR6 2 Ephemeroptera Heptageniidae AR6 2 Plecoptera Chloroperlidae Suwallia AR6 2 Ephemeroptera Baetidae Baetis bicaudatus 4.0 0.1 31.6 Summary of the benthic macroinvertebrates collected at sampling locations in proposed Segments 3a, 4a, and 4b of the upper Animas River, 1994. Total Total area density/ Total # #of #of #of Site Rep Order Family Genus Species # abundance sq. meter Taxa Ephemer plecop tricop AR6 3 Ephemeroptera Heptageniidae Rithrogena robusta 5 AR6 3 Ephemeroptera Baetidae Baetis bicaudatus 1 AR6 3 Plecoptera Chloroperildae Suwallia 1 7.0 0.1 55.4 3 2 1 0 Mean 6.3 50.1 3.3 2.0 1.0 0.0 SD 2.1 16.5 0.6 0.0 0.0 0.0

AR7 Tricoptera Arctopsychidae Arctopsyche grandis 2 AR7 Ephemeroptera Heptageniidae Rithrogena robusta 4 AR7 Ephemeroptera Baetidae Baetis bicaudatus 7 AR7 Diptera Tipulidae 1 AR7 Ditpera 2 16.0 0.1 126.5 5 2 0 1 AR7 2 Tricoptera Arctopsychidae Arctopsyche grandis 2 AR7 2 Ephemeroptera Baetidae Baetis bicaudatus 6 AR7 2 Diptera SImuliidaa prosimulium 1 AR7 2 Ephemeroptera Heptageniidae Rithrogena robusta 5 14.0 0.1 110.7 4 2 0 1 AR7 3 Ephemeroptera Heptageniidae Epeorus albertae 1 AR7 3 Ephemeroptera Baetidae Baetis bicaudatus 4 AR7 3 Ephemeroptera Tricorythidae Tricorythodes minutus 1 AR7 3 Diptera 1 7.0 0.1 55.4 4 3 0 0 Mean 12.3 97.5 4.3 2.3 0.0 0.7 SD 4.7 37.4 0.6 0.6 0.0 0.6

AR8 Tricoptera Arctopsychidae Arctopsyche grandis 1 AR8 Ephemeroptera Baetidae Baetis bicaudatus 13 ARB Ephemeroptera Heptageniidae Epeorus albertae B AR8 Ephemeroptera Heptageniidae Rithrogena robusta 1 AR8 Plecoptera Chloroperildae Suwallia 2 AR8 Diptera Deuterophlebidae Dueterophlebia coloradensis 2 AR8 Diptera 1 28.0 0.1 221.4 7 2 1 1 AR8 2 Ephemeroptera Heptageniidae Epeorus albertae 2 AR8 2 Ephemeroptera Heptageniidae Rithrogena robusta 1 AR8 2 Ephemeroptera Heptageniidae Cynlgmula 1 AR8 2 Diptera Blephariceridae Bibiocephala 3 AR8 2 Plecoptera Chloroperildae Suwallia 1 AR8 2 Ephemeroptera Baetidae Baetis bicaudatus 4 12.0 0.1 94.9 6 4 1 0 AR8 3 Ephemeroptera Baetidae Baetis bicaudatus 13 AR8 3 Ephemeroptera Heptageniidae Rithrogena robusta 10 AR8 3 Plecoptera Nemouridae Zapada 4 AR8 3 Diptera 2 ARB 3 Diptera Simuliidae proslulium 2 ARB 3 Diptera Deuterophlebidae Dueterophlebia coloradensis 1 Summary of the benthic macroinvertebrates collected at sampling locations In proposed Segments 3a, 4a, and 4b of the upper Animas River, 1994. Total Total area density/ Total # #of #0f #of SIta Rep Order Family Genus Species # abundance sq. meter Taxa Ephemer plecop tricop ARB 3 Tricoptera Arctopsychidae Arctopsyche grandis 2 ARB 3 Diptera Blephariceridae Bibiocephala 1 ARB 3 Plecoptera Chloroperildae Suwallia 3 38.0 0.1 300.5 9 2 2 1 Mean 26.0 205.6 7.3 2.7 1.3 0.7 SD 13.1 103.7 1.5 1.2 0.6 0.6

AR9 Tricoptera Arctopsychidae Arctopsyche grandis 3 AR9 Ephemeroptera Heptageniidae Rithrogena robusta 13 ARg Ephemeroptera Baetidae Baetis bicaudatus 18 AR9 Plecoptera Nemouridae zapada 1 AR9 Diptera Deuterophlebidae Dueterophlebia coloradensis 1 AR9 Diptera Blephariceridae Bibiocephala 1 37.0 0.1 292.6 6 2 1 1 AR9 2 Diptera Blephariceridae Bibiocephala 2 AR9 2 Ephemeroptera Baetidae Baetis bicaudatus 3 AR9 2 Plecoptera Chloroperildae Suwallia 1 AR9 2 Diptera 2 AR9 2 Diptera Chironomidae orthocladilnaa 1 9.0 0.1 71.2 5 1 1 0 AR9 3 Ephemeroptera Baetidae Baetis bicaudatus 27 AR9 3 Ephemeroptera Heptageniidae Rithrogena robusta 18 AR9 3 Ephemeroptera Ephemerellidae Ephemerella coloradensis 1 AR9 3 Plecoptera Perildae Hesperoperia pacifica 1 AR9 3 Diptera Chironomidae orthocladiinae 1 AR9 3 Tricoptera Rhyacophiladae Rhyacophila 1 49.0 0.1 387.5 6 3 1 1 Mean 31.7 250.4 5.7 2.0 1.0 0.7 SD 20.5 162.3 0.6 1.0 0.0 0.6

ARIO 1 Ephemeroptera Heptageniidae Rithrogena robusta 41 AR10 1 Ephemeroptera Baetidae Baetis bicaudatus 5 ARIO 1 Plecoptera Chloroperildae Suwalla 1 Plecoptera Nemouridae Zapada 1 ARIO 1 Diptera Chironomidae orthocladiinae 1 ARIO 1 Diptera Deuterophiibidae Dueterophlebia coloradensis 1 50.0 0.1 395.4 6 2 2 0 AR10 2 Ephemeroptera Heptageniidae Rithrogena robusta 28 ARIO 2 Ephemeroptera Baetidae Baetis bicaudatus 4 AR10 2 Plecoptera Chloroperildae Suwalla 2 AR10 2 Tricoptera Arctopsychidae Arctopsyche grandis 2 ARIO 2 Diptera Athericidae Atherix pachypus 1 ARIO 2 Diptera Chironimldae orthocladiinae 1 ARIO 2 Diptera Deuterophlebidae Dueterophlebia coloradensis 1 39.0 0.1 308.4 7 2 1 1 ARIO 3 Ephemeroptera Heptageniidae Rithrogena robusta 27 ARIO 3 Ephemeroptera Baetidae Baetis bicaudatus 5 Summary of the benthic macroinvertebrates collected at sampling locations In proposed Segments 3a, 4a, and 4b of the upper Animas River, 1994. Total Total area density/ Total # #of #of #of Site Rep Order Family Genus Species # abundance sq. meter Taxa Ephemer plecop tricop ARIO 3 Plecoptera Chloroperlidae Suwalla 11 AR10 3 Tricoptera Arctopsychidae Arctopsyche grandis 1 AR-IO 3 Diptera Chironomidae orthocladiinae 1 ARIO 3 Diptera Deuterophlebidae Dueterophlebia coloradensis 1 ARIO 3 Diptera Simuliidae Prosimulium 1 AR10 3 Ephemeroptera Ephemerellidae Ephemerella coloradensis 3 ARIO 3 Coleoptera Elmidae Heterilmnius 1 51.0 0.1 403.3 9 3 1 1 Mean 46.7 369.0 7.3 2.3 1.3 0.7 SD 6.7 52.7 1.5 0.6 0.6 0.6

AR11 Diptera 1 AR11 Plecoptera Perlodidae Sl

ARI 2 Diptera 1 ARI 2 Ephemeroptera Baetidae Baetis bicaudatus 6 ARI 2 Ephemeroptera Heptageniidae Rithrogena robusta 1 AR12 Diptera pupae 1 ARI 2 Diptera Chironomidae orthocladiinae 2 AR12 Diptera Empididae 1 ARI 2 Plecoptera Chloroperildae Suwalla 1 13.0 0.1 102.8 7 2 1 0 Summary ofthe benthic macroinvertebrates collected at sampling locations In proposed Segments 3a, 4a, and 4b of the upper Animas River, 1994. Total Total area density/ Total # #of #of #of Site Rep Order Family Genus Species # abundance sq. meter Taxa Ephemer plecop tricop AR12 2 Ephemeroptera Baetidae Baetis bicaudatus 4 AR12 2 Plecoptera Chloroperlidae Suwalla 1 AR12 2 Diptera Chironomidae 3 8.0 0.1 63.3 ARI 2 3 Plecoptera Perildae Heperoperia pacifica 1 ARI 2 3 Ephemeroptera Baetidae Baetis bicaudatus 8 ARI 2 3 Plecoptera Nemouridae zapada 1 ARI 2 3 Plecoptera Chloroperildae Suwalla 1 AR12 3 Diptera Chironomidae 7 AR12 3 Tricoptera Uenoidae Oligophlebodes 1 ARI 2 3 Diptera Empididae Pupae 1 20.0 0.1 158.2 7 1 3 1 Mean 13.7 108.1 5.7 1.3 1.7 0.3 SD 6.0 47.7 2.3 0.6 1.2 0.6

AR13 Haplotaxida Enchytracidae 3 AR13 Haplotaxida Lumbricidae 1 ARI 3 Tricoptera Arctopsychidae Arctopsyche grandis 1 AR13 Tricoptera Glossosamatidae 2 AR13 Tricoptera Brachycentridae 1 AR13 Plecoptera Perildae Hesperoperia pacifica 2 ARI 3 Plecoptera Nemouridae zapada 1 AR13 Plecoptera Nemouridae malenka 1 ARI 3 Diptera Simuliidae prosimulium 3 AR13 Coleoptera Elmidae Narpus 2 ARI 3 Ephemeroptera Baetidae Baetis bicaudatus 30 AR13 Ephemeroptera Baetidae Baetis tricaudatus 13 AR13 Ephemeroptera Heptageniidae Rithrogena robusta 1 ARI 3 Ephemeroptera Ephemerellidae 1 ARI 3 Diptera Chironomidae 4 AR13 Diptera Athericidae Atherix 1 67.0 0.1 529.8 16 ARI 3 2 Plecoptera Perildae Hesperoperia pacifica 1 AR13 2 Plecoptera Periodidae isoperia 1 ARI 3 2 Diptera Athericidae Atherix pachypus 1 AR13 2 Diptera Simuliidae 1 ARI 3 2 Ephemeroptera Baetidae Baetis tricaudatus 40 AR13 2 Ephemeroptera Baetidae Baetis bicaudatus 25 AR13 2 Ephemeroptera Heptageniidae Rithrogena 1 ARI 3 2 Ephemeroptera Heptageniidae Cinygmula 2 AR13 2 Ephemeroptera Heptageniidae Epeorus 3 AR13 2 Ephemeroptera Ephemerellidae 1 ARI 3 2 Coleoptera Elmidae Narpus 2 1 ARI 3 2 Coleoptera Elmidae Heterolimnus corpulentus Summary of the benthic macroinvertebrates collected at sampling locations In proposed Segments 3a, 4a, and 4b of the upper Animas River, 1994. Total Total area density/ Total # #of #of #of Site Rep Order Family Genus Species # abundance sq. meter Taxa Ephemer plecop tricop AR13 2 Tricoptera Brachycentridae 4 ARI 3 2 Diptera Chironomidae 8 AR13 2 Diptera Deuterophlebidae Deuterophlebia coloradensis 2 93.0 0.1 735.5 15 6 2 1 ARI 3 3 Diptera Athericidae Atherix pachypus 1 AR13 3 Ephemeroptera Baetidae Baetis tricaudatus 48 AR13 3 Ephemeroptera Baetidae Baetis bicaudatus 62 AR13 3 Ephemeroptera Ephemerellidae Ephemerella Infrequens/in 8 ARI 3 3 Ephemeroptera Heptageniidae Epeorus 7 ARI 3 3 Ephemeroptera Heptageniidae Cinygmula 3 AR13 3 Plecoptera Nemouridae Malenl

ARI 4 Ephemeroptera Baetidae Baetis tricaudatus 26 ARM Ephemeroptera Baetidae Baetis bicaudatus 135 ARM Ephemeroptera Ephemerellidae Ephemerella infrequens/in 11 ARI 4 Tricoptera Brachycentridae 18 AR14 Tricoptera Arctopsychidae Arctopsyche grandis 8 ARI 4 Diptera Chironomidae 41 AR14 Diptera Simuliidae prosimulium 13 AR14 Coleoptera Elmidae Narpus 2 AR14 Diptera Tipullldae Hexatoma 1 ARM Trombiformes Hydracarina 1 256.0 0.1 2024.5 10 3 0 2 ARM 2 Diptera Tipullldae Hexatoma 2 ARM 2 Ephemeroptera Baetidae Baetis tricaudatus 4 ARM 2 Ephemeroptera Baetidae Baetis bicaudatus 68 ARM 2 Ephemeroptera Ephemerellidae Ephemerella Infrequens/in 7 ARM 2 Diptera Chironomidae 29 ARM 2 Tricoptera Brachycentridae 13 ARM 2 Coleoptera Elmidae Heterolimnus corpulentus 3 ARM 2 Diptera Ceratopognidae 1 ARM 2 Trombidiformes Hydracarina 1 128.0 0.1 1012.2 9 3 0 1 ARM 3 Ephemeroptera Baetidae Baetis tricaudatus 7 ARM 3 Ephemeroptera Baetidae Baetis bicaudatus 109 ARM 3 Ephemeroptera Ephemerellidae Ephemerella infrequens/in 19 Summary of tha benthic macroinvertebrates collected at sampling locations In proposed Segments 3a, 4a, and 4b of tha upper Animas River, 1994. Total Total area density/ Total # #of # of # of Site Rep Order Family Genus Species # abundance sq. meter Taxa Ephemer plecop tricop ARM 3 Ephemeroptera Heptageniidae Cinygmula 1 ARM 3 Diptera Tipulidae Hexatoma 3 ARM 3 Tricoptera Brachycentridae 94 ARM 3 Tricoptera Arctopsychidae Arctopsyche grandis 4 ARM 3 Tricoptera Glossosamatidae 1 ARM 3 Plecoptera Periodidae isoperia 1 ARM 3 Coleoptera Elimldae Heterolimnus corpulentus 1 ARM 3 Diptera 17 ARI 4 3 Trombidiformes Hydracarina 4 261.0 0.1 2064.0 13 4 1 3 Mean 215.0 1700.3 10.7 3.3 0.3 2.0 SD 75.4 596.2 2.1 0.6 0.6 1.0