Group I Group II P. Mytilus 1. Brachiopoda Q. Planorbis 2. Cephalopoda R. Productus 3. Gastropoda S. Acanthoceras 4. Pelecypoda
Matching Invertebrate Genera to Class/Phylum
This question requires matching specific invertebrate genera from Group I to their correct biological Class or Phylum listed in Group II.
Genus Mytilus Classification
Mytilus is a genus of marine bivalve molluscs, commonly known as mussels. Bivalves belong to the Class Pelecypoda (also known as Bivalvia).
- P. Mytilus → 4. Pelecypoda
Genus Planorbis Classification
Planorbis is a genus of freshwater air-breathing snails. Snails are characterized by a single, typically coiled shell and belong to the Class Gastropoda.
- Q. Planorbis → 3. Gastropoda
Genus Productus Classification
Productus is an extinct genus of articulate brachiopods. Brachiopods are a distinct phylum of marine invertebrates.
- R. Productus → 1. Brachiopoda
Genus Acanthoceras Classification
Acanthoceras is an extinct genus of ammonites, which were a group of marine molluscs. Ammonites are classified within the subclass Ammonoidea, belonging to the Class Cephalopoda.
- S. Acanthoceras → 2. Cephalopoda
Final Matching Summary
Based on the individual classifications:
- P matches with 4 (Pelecypoda)
- Q matches with 3 (Gastropoda)
- R matches with 1 (Brachiopoda)
- S matches with 2 (Cephalopoda)
Therefore, the correct matching is P-4, Q-3, R-1, S-2.
Important Questions from Paleobiology (Taxonomy, Morphology of Invertebrates)
Based on the three statements given below, choose the CORRECT option.
Statement I: Echinoids have water vascular system.
Statement II: Delthyrium and pedicle foramen are found in the brachial valve of brachiopods.
Statement III: Cardinal teeth, adductor muscles and chondrophore are found in bivalves.Which of the following statements regarding marine organisms is/are NOT true?
- Match the features (Group I) with the corresponding invertebrate genera (Group II).
Group I Group II P. Cardinal Fossula 1. Calymene Q. Chrondrophore 2. Rhynchonella R. Lophophore 3. Zaphrentis S. Glabella 4. Mya - Given below are pairs of "living fossils". Which one of the following is a brachiopod-mollusc pair?
Match the following patterns (listed in Group I) with their appropriate Cephalopod sutures (listed in Group II). Arrow gives the direction of aperture.
Group I Group II P. 
1. Ceratitic Q. 
2. Nautilitic R. 
3. Goniatitic S. 
4. Orthoceratitic
