Noun:

அம்மோனைட்,

ammonites தமிழ் அர்த்தத்தின் உதாரணம்:

மர புதைபடிமங்கள் மற்றும் அம்மோனைட் புதைபடிமங்களும் காட்சிக்கு வைக்கப்பட்டுள்ளன.

அம்மோனைட் (செமிடிக்) (அழிந்துவிட்டது).

ammonites's Usage Examples:

Cephalopod molluscs have been traced back to the straight-shelled nautiloids of the genus Volborthella, while true ammonites have been found in the inferior Permian of the Continent and by American palaeontologists in the true coal measures.

Whereas among many ammonites and gastropods smooth ness of the shell, following upon an ornamental youthful Condition, is generally a symptom of decline, among many other invertebrates and vertebrates, as C.

Such diverse organisms as brachiopods, ammonites, horses and rhinoceroses absolutely conform to this law in all those rare localities where we have been able to observe closely sequent stages.

This, too, is an excellent place to find ammonites and the eagle-eyed are also likely to find the bullet-shaped belemnites.

Their fossils include belemnites, ammonites, scaphites and marine saurians, such as Cimoliosaurus.

Alpheus Hyatt (1838-1902) was the first to discover (1866) that these changes in the form of the ammonite shell agreed closely with those which had been passed through in the ancestral history of the ammonites.

At Portrush, the Lower Lias is seen on the shore, crowded with ammonites, but silicified and metamorphosed by invading dolerite.

Among the ammonites the loss of power to coil the shell is one feature of racial old age, and in others old age is accompanied by closer coiling and loss of surface ornamentation, such as spines, ribs, spirals; while in other forms an arresting of variability precedes extinction.

In the seas, bony fish and crab-like decapods increased in numbers and variety, while pelecypods and gasteropods took the prominent place previously occupied by ammonites and belemnites, and, leaving behind such forms as Rudistes, Inoceramus, 'c.

Synonyms:

ammonoid, fossil,

Antonyms:

None