Pseudemys texana 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Reptilia Testudines Emydidae

Scientific Name: Pseudemys texana Baur, 1893
Common Name(s):
English Texas Cooter
Pseudemys concinna ssp. texana Baur, 1893

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2011
Date Assessed: 2010-08-01
Assessor(s): van Dijk, P.P.
Reviewer(s): Horne, B.D., Mittermeier, R.A., Philippen, H.-D., Quinn, H.R., Rhodin, A.G.J., Shaffer, H.B. & Vogt, R.C
Pseudemys texana is evaluated as Least Concern given its abundant occurrence across a wide range, its tolerance of human disturbance and modest habitat alteration, and limited threats from collection or other specific impacts.
Previously published Red List assessments:

Geographic Range [top]

Range Description:

Pseudemys texana inhabits the river systems of central Texas, specifically the Brazos, Colorado, Guadalupe and San Antonio systems.

Countries occurrence:
United States (Texas)
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]


Pseudemys texana is generally abundant where it occurs. Vermersch (1992) speculated that the creation of impoundments and other shallow vegetated waterbodies within its range has increased its abundance. Despite pollution of the San Antonio river, the species appeared more abundant there in 1992 than in the late 1960s (Vermersch 1992), while Graptemys caglei disappeared from the river over the same period.

Current Population Trend:Unknown
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:

Pseudemys texana inhabits mostly rivers but also utilizes reservoirs and impoundments, nearby cattle tanks, canals and irrigation ditches; great densities are reached in clear water with dense aquatic vegetation beds

Pseudemys texana feeds almost predominantly on submerged aquatic vegetation, with aquatic invertebrate prey representing a small dietary component (Fields et al. 2003, Lindeman 2007).

Males may reach 25.3 cm carapace length (CL), females exceptionally may attain 33 cm CL. Maturity is reached by males from their second year onwards, at 9 cm CL, while females can be mature at 22.3 cm CL. Clutch size averages 8.5 eggs (range 6-9). (Lindeman, 2007). Hatchling size, longevity and generation time have apparently not been reported.
Systems:Terrestrial; Freshwater

Threats [top]

Major Threat(s): No specific threats to Pseudemys texana appear to have been reported.

Conservation Actions [top]

Conservation Actions:

Pseudemys texana occurs in several riverside protected areas. Commercial collection of turtles in Texas public waters was ended in 2007.

Monitoring of populations at representative locations would be welcome, as would further research on the natural history and conservation needs for the species.

Errata [top]

Errata reason: An errata assessment is required to generate a revised PDF without the range map which had been included in error; no range map was available when this assessment was originally published.

Citation: van Dijk, P.P. 2011. Pseudemys texana (errata version published in 2016). The IUCN Red List of Threatened Species 2011: e.T170497A97427865. . Downloaded on 21 September 2018.
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