Published Oct 31st, 10/31/24 5:10 pm
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- Thelodus is an extinct genus of primitive jawless fish that lived in the Silurian period. Fossils have been found worldwide
- Thelodus belonged to the Thelodonti, small jawless fishes, related to the heterostracans (an extinct jawless fish with the anterior part of its body covered with bony plates; these fishes exist mostly in the Silurian and Devonian period.), though they did not have head shields, only the tiny bony scales covered their bodies.
- The mouth of this thelodontid was on the underside of its flattened head, which makes us clear that it fed on the seabed. It was also a good swimmer.
- The lower lobe of the tail was elongated and fins were there for stability. A dorsal fin and an anal fin were there at the rear and a paired pectoral fins were present at the front.Thelodus was more agile than its contemporaries, who were encased in thick bony armour.
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