Which of the following biological names is correctly printed...

According to the universal rules of binomial nomenclature:
1. Biological names are generally in Latin and printed in italics to indicate their Latin origin.
2. The first word represents the genus and must start with a capital letter.
3. The second word represents the specific epithet and must start with a small letter.

$\textit{Triticum aestivum}$ correctly follows all rules.
$\textit{Musca Domestica}$ is incorrect because the specific epithet starts with a capital letter.
$\textit{panthera pardus}$ is incorrect because the generic name starts with a small letter.
Mangifera indica is incorrect because it is not printed in italics.

Answer: $\textit{Triticum aestivum}$