Herdmania belongs to:

Options

A. Hemichordata
B. Urochordata
C. Cephalochordata
D. Gnathostomata

Answer

**Step-by-Step Solution:**

1. **Understanding the Classification of Chordates:**
- Chordates are classified into three sub-phyla:
- Eurochordata
- Cephalochordata
- Vertebrata

2. **Identifying the Characteristics of Eurochordata:**
- In Eurochordata, the notochord is present only in the tail during the larval stage.
- This group is also referred to as the Ascidia group.

3. **Locating Herdmania:**
- Herdmania is classified under Eurochordata due to its characteristics, specifically the presence of the notochord only in the tail region during its larval stage.

4. **Excluding Other Options:**
- Hemichordata is a separate phylum and does not include Herdmania.
- Cephalochordata has notochord extending from head to tail, which does not apply to Herdmania.
- Nethostomata is a superclass that includes jawed organisms, which is not relevant to Herdmania.

5. **Conclusion:**
- Therefore, Herdmania belongs to the sub-phylum Eurochordata.

**Final Answer:**
Herdmania belongs to Eurochordata.

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