They were named for Dr. William McCord, a veterinary and turtle expert from Hopewell Junction, New York.
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In captivity, hybrids have been produced between this species and Japanese pond turtle and the Chinese pond turtle, as well as with a male Cyclemys (oldhami) shanensis.
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The supposed species Ocadia glyphistoma is a hybrid between a male O. sinensis and a female Vietnamese pond turtle.
The lizard genus Lacerta and fish genus Phoxinus are the only other known examples of diploid-triploid mosaicism.