Question

different between crossopterygi and dipnoi​

Answer 1

Difference # Crossopterygii:

1. Maxilla absent, (except in some fossil forms); pre-maxilla present.

2. Palatoquadrate not fused to cranium.

3. Teeth not fused.

4. Two dorsal fins present.

5. Paired fins-uniserial lobe-fins.

6. Cloaca absent.

Example – Latemeria chalumnae.

Difference # Dipnoi:

1. Both maxilla and pre-maxilla absent.

2. Palatoquadrate fused to cranium (Autostylic jaw suspension).

3. Teeth fused to form crushing tooth plates (Dental plates).

4. A single dorsal fin continues with anal and caudal in recent forms.

5. Paired fins-biserial lobe-fins.

6. Cloaca present.

Example – Neoceratodus, Lepidosiren and Protupterus.

Explanation:

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Answer 2

Difference between Crossopterygii and Dipnoi | Fish | Fisheries

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The upcoming discussion will update you about the difference between crossopterygii and dipnoi.

Difference # Crossopterygii:

1. Maxilla absent, (except in some fossil forms); pre-maxilla present.

2. Palatoquadrate not fused to cranium.

3. Teeth not fused.

4. Two dorsal fins present.

5. Paired fins-uniserial lobe-fins.

6. Cloaca absent.

Example – Latemeria chalumnae.

Difference # Dipnoi:

1. Both maxilla and pre-maxilla absent.

2. Palatoquadrate fused to cranium (Autostylic jaw suspension).

3. Teeth fused to form crushing tooth plates (Dental plates).