Let us learn about the comparison between limbless lizards and snakes.
Comparison # Limbless Lizards:
1. Limbs:
Absent but vestige of girdles are present.
2. Shape of body:
Cylindrical.
3. Tail:
Long
4. Eyelid:
Movable eyelids are present.
5. External ear opening:
External ear opening is present
6. Tongue:
A short, flat tongue is present.
7. Scales:
Ring –link overlapping scale are present on the body
Example:
Slow worm (Anguis fragilis) Glass snake Lizard (ophisaurs gracilis)
Comparison # Snakes:
1. Limbs:
Absent except Boas and Pythons where gridles and vestiges of hind limbs present.
2. Shape of the body:
Cylindrical
3. Tail:
Short
4. Eyelids:
Immovable eyelids are present (The eyelids are always fused together and form a transparent membrane over the eye)
5. External ear opening:
Absent
6. Tongue:
A slender and deeply forked tongue is present.
7. Scales:
Arrangements, structure and numbers of scales vary in different region of the body. . Scales on the back may be smooth or keeled and on the abdomen may be broader. Scales on the head are larger and called scutes.
Examples:
Python (Phthon sp); Cobra (Naja naja) etc.)