These are the species that I am currently working with.

North America

Chrysemys picta belli - Western Painted Turtle

Chrysemys picta picta - Eastern Painted Turtle

Clemmys guttata - Spotted Turtle

Glyptemys insculpta - Wood Turtle

Kinosternon baurii - Three-striped Mud Turtle

Kinosternon flavescens - Yellow Mud Turtle

Central and South America

Acanthochelys spixii - Spiny-necked Turtle

Geochelone carbonaria - Red-footed Tortoise

Kinosternon leucostomum - White-cheeked Mud Turtle

Kinosternon scorpioides albogulare - White-throated Mud Turtle

Kinosternon scorpioides cruentatum - Red-cheeked Mud Turtle

Kinosternon scorpioides scorpioides - Scorpion Mud Turtle

Phrynops geoffroanus tuberosus - Peter's Sideneck Turtle

Phrynops gibbus - Gibba Sideneck Turtle

Phrynops hilarii - Hilaire's Sideneck Turtle

Phrynops nasuta - Toad-headed Turtle

Platemys platycephala - Twist-necked Turtle

Rhinoclemmys pulcherrima manni - Central American Wood Turtle

Staurotypus salvinii - Chiapan Giant Musk Turtle

Staurotypus triporcatus - Mexican Giant Musk Turtle

Europe

Agrionemys horsfieldii - Russian Tortoise

Emys orbicularis - European Pond Turtle

Mauremys caspica rivulata - Western Caspian Pond Turtle

Testudo hermanni boettgeri - Eastern Hermann's Tortoise

Testudo graeca ibera - Turkish Spur-thighed Tortoise

Testudo graeca terrestris - Golden Greek Tortoise

Testudo marginata - Marginated Tortoise

Africa

Cyclanorbis senegalensis - Senegal Flapshell Turtle

Geochelone sulcata - African Spurred Tortoise

Malacochersus tornieri - Pancake Tortoise

Pelomedusa subrufa - Helmeted Turle

Pelusios castaneus - West African Mud Turtle

India

Geochelone elegans - Indian Star Tortoise

Kachuga smithi - Brown Roofed Turtle

Asia

Annamemys annamensis - Vietnamese Leaf Turtle

Callagur borneoensis - Painted Terrapin

Chinemys nigricans - Kwangtung Turtle

Chinemys reevesii - Reeve's Turtle

Cuora amboinensis - Amboina Box Turtle

Cuora flavomarginata - Chinese Box Turtle

Cyclemys dentata - Asian Leaf Turtle

Hieremys annandalei - Yellow-headed Temple Turtle

Heosemys spinosa - Spiny Turtle

Indotestudo forsteni - Forsten's Tortoise

Manouria e. emys - Burmese Brown Tortoise

Notochelys platynota - Malayan Flat-shelled Turtle

Ocadia sinensis - Chinese Stripe-necked Turtle

Sacalia bealei - Beal's Eyed Turtle

Siebenrockiella crassicollis - Black Marsh Turtle

Indo-Australia

Chelodina parkeri - Parker's Snakeneck Turtle

Chelodina reimanni - Reimann's Snakeneck Turtle

Chelodina siebenrocki - Siebenrock's Snakeneck Turtle

Elseya branderhorstii - Southern New Guinea Snapping Turtle

Elseya novaeguinea - New Guinea Snapping Turtle

Elseya schultzei - Northern New Guinea Snapping Turtle

Emydura subglobosa - Red-bellied Short-necked Turtle