Figure 6From: Distribution, genetic analysis and conservation priorities for rare Texas freshwater molluscs in the genera Fusconaia and Pleurobema (Bivalvia: Unionidae)Historical (before 1940, A) and current (1990-present, B) distribution of Pleurobema riddellii in Texas. Historical data are from Frierson [24], Strecker [34], Bachtel [35]. Current data include authors’ data and literature records [15, 30, 31].Back to article page