Final answer:
The correct species name is 'C. Pelecinus polyturator' with the genus name capitalized and the species name in lower-case, both italicized. Therefore, the correct option is C.
Step-by-step explanation:
As per the rules of binomial nomenclature, a species name must have two parts: the genus name and the specific epithet (species name). The correctly written species name from the given options is C. Pelecinus polyturator. According to binomial nomenclature rules, the genus name should be capitalized and the species name should be all in lower-case letters. Furthermore, both parts of the name should be in italics when printed.