Abstract

Within the western extent of its range, Fundulus chrysotus (Golden Topminnow) is generally restricted to coastal drainages of Texas, with few reported occurrences inland. We report a new record of Golden Topminnow in the upper San Marcos River of Texas. The occurrence of Golden Topminnow could represent a natural range expansion or incidental introduction to the area. Future monitoring of the population within the San Marcos River (Guadalupe River basin) is needed to confirm if the species becomes established.

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