A dorsal sclerite of cockroach is called-

Answer

### Step-by-Step Solution:

1. **Understanding the Structure of Cockroach**: The cockroach has an exoskeleton that covers its body. This exoskeleton is made up of a hard chitinous material.

2. **Defining Sclerites**: The segments of the exoskeleton are referred to as sclerites. These sclerites are the individual plates that make up the exoskeleton.

3. **Identifying Dorsal and Ventral Sclerites**: The sclerites can be found in different parts of the cockroach's body, specifically in the dorsal (top) and ventral (bottom) sections.

4. **Naming the Dorsal Sclerite**: The sclerites located in the dorsal section of the cockroach are specifically called "turga."

5. **Alternative Name**: The dorsal sclerite can also be referred to as "durgam."

### Final Answer:
The dorsal sclerite of a cockroach is called **turga** (or **durgam**).

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