Classification:

• Phylum: Chordata
• Class: Amphibia
• Order: Anura
• Genus: Hyla

Comments:

1. 1. Hyla is commonly called tree-frog due to its arboreal habits.
2. 2. Body measures 2.5 to 7.5 cm in length and is divided into head and trunk.
3. 3. Skin is smooth on the dorsal surface but bears papillae on the ventral surface.
4. 4. Head bears eyes, nostrils and tympanum.
5. 5. Fingers and toes have adhesive-pads or discs for sticking on the smooth surfaces. Web is poorly developed.
6. 6. Vocal sacs are greatly expanded and produce a loud voice.
7. 7. Teeth are present only in the upper jaw and absent in the lower jaw.
8. 8. Vertebrae are procoelous.
9. 9. Belly skin contains hygroscopic glands which help the animal to stick on leaf and twigs, etc.
10. 10. They exhibit mimicry and are remarkably protectively coloured.
11. 11. Fertilisation is external.
12. 12. Hyla arboreal, H. versicolor and H. regita, etc., are all tree frogs and adapted for amphibious and arboreal life.
13. 13. In Hyla goeldii, the eggs are carried on the back of the female. H. faber also shows parentalCare.

Source:

1. Practical Zoology Vertebrates by S.S.Lal. 2. A Manual of Practical Zoology Chordates by Dr. P.S. Verma.