Texas is home to two unique species of map turtles, Cagle’s map turtle (*Graptemys caglei*) and the Texas map turtle (*G. versa*). Cagle’s map turtle, endemic to the Guadalupe River drainage, is currently listed as state-threatened due to its limited range. In contrast, the Texas map turtle inhabits the Colorado River watershed and is classified as a Species of Greatest Conservation Need in Texas.  Recent surveys conducted in the upper Guadalupe River focused on Cagle’s map turtles have found an unexpected find within the presence of Texas map turtles in this particular river system. This discovery marks the first recorded instance of *G. versa* in the Guadalupe River drainage. In the area near Kerrville about 35–40 river kilometers, both species coexist, and several individuals experience intermediate phenotypic traits. This suggests the possibility of natural hybridization between the two species. The revelation of these hybrids raises important questions about the dynamics of the populations and the implications of conservation. 

Driven by these findings, a new research project has been initiated with several key objectives. First, the project aims to analyze the spatial population genomic structure of both species across their respective drainages. This will help in understanding how populations are distributed and connected genetically. Second, the study will trace the sources of colonization of *G. versa* into the upper Guadalupe River and assess the extent of *G. caglei*’s range. Third, researchers will investigate genomic evidence of hybridization between the two species. 

Additionally, this research will provide valuable morphological data at the population level. This data will not only help in assessing intraspecific variation but will also shed light on the phenotypic effects of hybridization if it occurs. This study is expected to significantly advance our understanding of the interactions between these two map turtle species and inform future conservation strategies to protect these unique and endangered reptiles.