When the specific epithet exactly repeats generic name, it is called:

Options

A. Basinym
B. Synonym
C. Homonym
D. Tautonym

Answer

To solve the question "When the specific epithet exactly repeats the generic name, it is called:", we can follow these steps:

### Step-by-Step Solution:

1. **Understand Binomial Nomenclature**:
- Binomial nomenclature is a system for naming species, developed by Carl Linnaeus. It consists of two parts: the genus name (first part) and the species name (second part).

2. **Identify the Terms**:
- The genus name is the first part of the name, and the species name is the second part. In this case, we are looking for a situation where both names are the same.

3. **Recognize the Concept of Tautonyms**:
- When the specific epithet (species name) is identical to the generic name, this is referred to as a tautonym.

4. **Provide an Example**:
- An example of a tautonym is "Rattus rattus," where both the genus and species names are the same.

5. **Conclusion**:
- Therefore, the term used when the specific epithet repeats the generic name is "tautonym."

### Final Answer:
The answer is **tautonym**.

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