Question

Match List I with List II
List I (Larval stages): A. Erichthus, B. Glaucothoe, C. Phyllosoma, D. Furcilia
List II (Organism groups): I. Spiny lobster, II. Euphausid, III. Hermit crab, IV. Stomatopod
Choose the correct answer from the options given below:

• A. A - III, B - IV, C - II, D - I
• B. A - IV, B - III, C - I, D - II
• C. A - IV, B - III, C - II, D - I
• D. A - III, B - I, C - IV, D - II

Hint:

Classic Crustacean Larvae to memorize:
1. Phyllosoma = Spiny Lobster.
2. Puerulus = Post-larval Spiny Lobster.
3. Megalopa = Crab.
4. Glaucothoe = Hermit Crab.
5. Alima/Erichthus = Mantis Shrimp.
6. Furcilia = Krill (Euphausiids).

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
The question involves matching specific larval stages of crustaceans with their corresponding adult taxonomic groups.
Detailed Explanation:

• Erichthus (A): This is a specialized larval stage of Stomatopods (Mantis shrimps). Stomatopods have complex larval development, often involving Alima or Erichthus stages depending on the family. (A matches IV).

• Glaucothoe (B): This is the post-larval (megalopa-like) stage of Hermit crabs (Anomura). It occurs after the zoea stages and before the adult-like hermit crab form. (B matches III).

• Phyllosoma (C): This is the iconic, flat, leaf-like, transparent larva of Spiny lobsters (Palinuridae). It is adapted for a long-duration planktonic life in ocean currents. (C matches I).

• Furcilia (D): This is one of the final larval stages of Euphausiids (Krill). Euphausiid development follows a sequence of Nauplius $\rightarrow$ Pseudometanauplius $\rightarrow$ Metanauplius $\rightarrow$ Calyptopis $\rightarrow$ Furcilia. (D matches II).

Step 2: Final Answer:
Matching the pairs: A-IV, B-III, C-I, D-II. This corresponds to Option (B).