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Let us learn about the comparison between fissipedia and pinnipedia.
Comparison # Fissipedia:
1. Distribution:
Cosmopolitan
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2. Habit:
Terrestrial
3. Digits:
Usually four, never less than four.
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4. Claws:
Usually four, never less than four.
5. Size of pollex and hallux:
Smaller than the rest.
6. Pinna:
Well-developed.
7. Skull:
Usually elongated with highly developed crests.
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8. Orbital constriction:
Ill-developed.
9. Palate:
Broad.
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10. Vertebral column:
Well-differentiated into different regions.
11. Scapula:
Scapular spine and acromian process are well developed.
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12. Clavicle:
Usually present, bit ill-developed.
13. Limb bones:
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Elongated and well–formed.
14. End of radius:
Rounded
15. Third trochanter:
Ill-developed or absent
16. Incisors:
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3/3
17. Canines:
Well – developed and sharp
18. Carnassial teeth:
Well -developed
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19. Molars:
Pointed
20. Testes:
May be abdominal or scrotral
21. Mammary gland:
Many pairs
22. Young’s:
Dependent
23. Examples:
Tiger (Panthera tigris) Lion (P .leo), Cat (Felis domesticus) Giant Panda (Ailuropoda melaneuca).
Comnparison # Pinnipedia:
1. Distribution:
Temperate and Arctic zones.
2. Habit:
Secondarily aquatic.
3. Digits:
Always five, bounded by web. Hyperphalangy is observed.
4. Claws:
May be absent
5. Size of pollex and hallux:
Larger than the rest.
6. Pinna:
Ill-developed or absent.
7. Skull:
Usually broad and rounded with ill-developed crests.
8. Orbital constriction:
Well-developed.
9. Palate:
Narrow.
10. Vertebral column:
Short and compact.
11. Scapula:
Not so much developed.
12. Clavicle:
Usually absent.
13. Limb bones:
Short and compact.
14. End of radius and ulna:
Flattened.
15. Third trochanter:
Well-marked.
16. Incisors:
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2/2.
17. Canines:
Usually flattened.
18. Carnassial teeth:
Absent.
19. Molars:
Usually Fattened
20. Testes:
Always scrotal.
21. Mammary glands:
One or two pairs.
22. Young’s:
Independent
23. Examples:
Sea-lion (Eumetopias), seals (Phoca), Walrus (Odobenus).
