The lamprey (Petromyzon) is included in the same taxonomic class as the

Options

A. Cephalaspis
B. Ambystoma
C. Neoceratodus
D. Hag fish (Myxine)

Answer

To determine which organism is included in the same taxonomic class as the lamprey (Petromyzon), we need to analyze the options provided and understand the classification of lampreys.

### Step-by-Step Solution:

1. **Identify the Taxonomic Classification of Lamprey**:
- Lampreys belong to the phylum **Chordata** and the class **Agnatha**. Agnatha is characterized by jawless fish.

2. **Understand the Options Provided**:
- **Option A: Cephalaspis** - This is an extinct genus of jawless fish, but it belongs to a different class than Agnatha.
- **Option B: Embolostoma** - This refers to a group that includes amphibians like salamanders, which are not in the same class as Agnatha.
- **Option C: Neoceratodus** - This is a genus of lungfish, which are part of the class Sarcopterygii, not Agnatha.
- **Option D: Hagfish (Myxine)** - Hagfish are also jawless fish and belong to the class Agnatha, making them the correct answer.

3. **Conclusion**:
- The lamprey (Petromyzon) is included in the same taxonomic class as the **hagfish (Myxine)**. Therefore, the correct answer is **Option D: Hagfish**.

### Final Answer:
The lamprey (Petromyzon) is included in the same taxonomic class as the **hagfish (Myxine)**.

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