Let us learn about the comparison between fissipedia and pinnipedia.

Comparison # Fissipedia:

1. Distribution:

Cosmopolitan

2. Habit:

Terrestrial

3. Digits:

Usually four, never less than four.

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.

8. Orbital con­striction:

Ill-developed.

9. Palate:

Broad.

10. Vertebral column:

Well-differentiated into different regions.

11. Scapula:

Scapular spine and acromian pro­cess are well developed.

12. Clavicle:

Usually present, bit ill-developed.

13. Limb bones:

Elongated and well–formed.

14. End of radius:

Rounded

15. Third trochanter:

Ill-developed or absent

16. Incisors:

3/3

17. Canines:

Well – developed and sharp

18. Carnassial teeth:

Well -developed

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:

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).

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