Specimen used for original publication by the author is

Options

A. Holotype
B. Isotype
C. Syntype
D. Lactotype

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks about the type of specimen used for the original publication by an author. This relates to the classification and naming of organisms in taxonomy.

2. **Identifying the Options**: The options given are:
- Holotype
- Isotype
- Syntype
- Lactotype

3. **Defining Each Term**:
- **Holotype**: This is the single specimen upon which the description and name of a new species is based. It is the original specimen collected and serves as the definitive example of that species.
- **Isotype**: This is a duplicate of the holotype. It is collected from the same location and at the same time as the holotype but is not the original specimen.
- **Syntype**: This refers to one of two or more specimens cited in the original description of a species when no holotype was designated. It is essentially a type specimen that is not a holotype.
- **Lactotype**: This is a term that is not commonly used in modern taxonomy. It refers to a specimen that is designated as a type after the original description but is not the first or second specimen collected.

4. **Analyzing the Options**:
- Since the question specifically asks for the specimen used for the original publication, we need to identify which of these options represents the first specimen collected.
- The **holotype** is the first specimen collected and is used for the original publication of a species.

5. **Conclusion**: The correct answer to the question is **Holotype**, as it is the specimen used for the original publication by the author.