PHYLUM :- CHORDATA (Notochord, dorsal tubular nerve cord present and gill slits present )

Group :- CRANIATA ( Definite head. Cranium with brain present )

Sub-phylum :- VERTEBRATA ( vertebral column present)

Division :- GNATHOSTOMATA ( Jaws and paired appendages present )

Super class :-  TETRAPODA ( Paired limbs, lungs, bony skeleton and cornified skin)

Class :- REPTILIA ( Scaly vertebrates with right and left aortic arches. Single condyle, pulmonary respiration. Embryo with amnion and allantois ).

Sub-class :- DIAPSIDA ( Skull with two temporal openings separated by postorbital and squamosal ).

Order :- CROCODILIA ( Body and head large. Jaws powerful. Skin thick and leathery. Tongue nonprotrusible, Heart 4-chambered ).

Family :- CROCODYLIDAE ( Snout not distinct from the rest of the skull ).

Genus :- Alligator


Alligator is found in China and North America.


Inhabits shallow water and on slight disturbance buries in sand.



  • Alligator resembles superficially with Crocodylus.
  • Body measures 3 to 4 metres in length. The upper part steel-grey and sides olive green. Body divisible into head, neck, trunk and tail.
  • Body is covered with thick leathery skin containing scutes. The dorsal bony scutes do not articulate with each other. The ventral scutes are with or without very little ossification. Mandibular symphysis is short extending only to the level of 4th and 5th tooth. In water eyes and nostrils are exposed.
  • Head is broad and snout bluntly rounded. Jaws long, powerful, rimmed with numerous, bluntly conical teeth which are unequal. Teeth 17-20/17-22 on each side. The first and fourth mandibular teeth
    fit into the pits of upper jaw.
  • Tongue not protrusible. Head contains mouth, nostril and eyes.
  • Small ear opening is protected by a flap of skin and nasal bones divide nasal aperture.
  • Forelimbs and hind limbs short, pentadactyl and ending in toes with webs in between.
  • Tail long, heavy compressed.
  • Heart 4-chambered with separate ventricles. Bladder absent.
  • Eggs are laid in nests.

Special features

The most obvious way to discern the two reptiles is to stare down their sinister snouts. Alligators have U-shaped faces that are wide and short, while crocodiles have slender almost V-shaped muzzles


This reptile has peculiar scales and above features hence it is Alligator.



  • Book of Practical Zoology VERTEBRATE by S.S.LAL – Rastogi Publications.

This Post Has 17 Comments

  1. Marguerite

    Thankfulness to my father who stated to me about this weblog,
    this blog is in fact amazing.

  2. Jacquie

    Hi there every one, here every person is sharing these experience, thus it’s
    good to read this weblog, and I used to visit this blog all
    the time.

  3. Alena

    Incredible! This blog looks just like my old one! It’s on a totally different topic but
    it has pretty much the same layout and design. Outstanding choice of colors!

  4. 918kaya apk

    Its like you read my mind! You appear to know a lot about this, like you wrote the book in it or something.

    I think that you can do with a few pics to drive the message
    home a little bit, but other than that, this is excellent blog.
    A fantastic read. I’ll definitely be back.

  5. mega888 test id

    Ahaa, its fastidious discussion about this post at this place at this website, I have read all that,
    so now me also commenting at this place.

  6. baca disini

    This blօg was… how d᧐ I say it? Relevant!!
    Finally I’νe found ѕomething which helpeԁ me. Thɑnk you!

Leave a Reply