The most recently discovered animal phylum is :

Options

A. Concentricycloidea
B. Pognophora
C. Lorcifera
D. Ctenophora

Answer

To solve the question about the most recently discovered animal phylum, we will analyze the given options step by step.

### Step 1: Understand the Question
The question asks for the most recently discovered animal phylum. We need to evaluate the options provided to identify which one fits this criterion.

### Step 2: Analyze the Options
1. **Echinodermata**: This phylum includes starfish and sea urchins. It is not a recently discovered phylum, as it has been known for a long time.

2. **Pogonophora**: This refers to a group of polychaete annelid worms. While interesting, it is also not a recently discovered phylum.

3. **Loricifera**: This is a phylum of very small, microscopic marine animals that was discovered relatively recently. This makes it a strong candidate for the answer.

4. **Ctenophora**: This phylum includes comb jellies and is also not a recently discovered group.

### Step 3: Identify the Correct Answer
After analyzing all the options, **Loricifera** is the correct answer as it is the most recently discovered animal phylum.

### Conclusion
The most recently discovered animal phylum is **Loricifera**.

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