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Rio Grande Cooter vs. River Cooter

Both are big cooters of Texas rivers (records share 3 one-degree squares on the Pecos and Rio Grande). A: Bull's-eye rings: dark and pale rings one inside another in the Rio Grande Cooter; pale lines curving into a C on the second side plate in the River Cooter. In New Mexico only the Rio Grande Cooter lives in the lower Pecos and Black rivers.

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Rio Grande Cooter

Pseudemys gorzugi

River Cooter

Pseudemys concinna
Rio Grande Cooter vs. River Cooter: comparison sheet with the differences marked

Photographs via iNaturalist under Creative Commons licences; the photographers are credited on the sheet.

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