Keys to Water Quality Indicative Organisms of the Southeastern United States

abdominal segment absent Alabama algae anal proleg Antennae aquatic habitats basal bifid Biology branches Cambarus carapace Carolina caudal central projection cephalic chironomids County coxa crayfishes dark claws Decapoda Dextral view diameter distal Dorsal view drainage systems eye spot Faxon filaments fishes Florida freshwater fungi Gastropoda genera genus Georgia gills Group habitats habitats and burrows hair setae head capsule Heterocysts heterogenae Hobbs homogenae identification Labial plate larvae Lateral view left pleopods legs lentic habitats mandible mandibular median mesial process Mesonotum metanotum Mississippi North America Ohio oligochaete operculum Orconectes organisms Oscillatoria outer pair papillae paralabial pectinate Pectinate setae Pelecypoda Penis sheaths pereiopods plastids pleopod pollution posterior prolegs present Procambarus prolegs pronotum right valves River rostrum sclerotized setae shell Fig species specimens spermathecal seta spines streams Subfamily surface Tennessee Threads tooth transverse Trichoptera Tubificidae unionid clams Unioninae Univ ventral setae view of chela wall worms