IT IS PICTORIAL REPRESENTATION OF ANCESTORS OF MAMMALS WITH COMMENTS IN ENGLISH AS WELL AS HINDI DESCRIBING SPECIAL FEATURES BRIEFLY IN POETIC FORMAT OR STYLE AND THIS PART COVERS FIRST SIX REPTILIAN ANCESTORS OF MAMMALS .

2. TRANSITION BETWEEN REPTILES & MAMMALS 25
Reptilian Ancestors of Mammals
Therapsid Cynodonts
Reptiles of Paleozoic
BecameMammalsin Mesozoic
Oh ! What a surprise!
True, but does’nt easilyclick
SmallTherapsidCynodonts
Of Permian/ Triassicjunction
Mostlyhiding in day
Comingout at night dusk& dawn!
Carrying on theircores somehow
With careand caution
During Dinosaurianworld
Huntinginsectsor catchingfishes
Livingin largeforestsof ferns
And tall Gymnosperms
Our Great grand ancestors!
Oh ! how they looked like!
Let us see - one by one.:

4. Transitionalforms
Procynosuchus
Born millionsof years before
The Dogs and Crocodiles
In Paleozoic’s Permianperiod
With teeth likethoseof dogs
We were smallanimals
Onlya coupleof feet long
With flat feet and long tail
Living likeottersor beavers
In largelush green jungles
Of ferns and Gymnosperms
When Dinosaursruled the world
And managedto survive
Hunting insectsor catchingfishes
Leadinga semiaquaticlife
in a scaringancientworld .
The first mammallikereptile!
Great Grandfather of all mammals.

6. Transitionalforms
Cahrassognathus
One of the firstfew
Mammaliaformreptiles
Of latePermianperiod
With mammalianfeatures
Like hairs or furs
And manydog liketeeth
A bit micelikeor Dog like
But slendernotched jaw
One of the earlier ones
In the long lineof
Our great grand ancestors.

8. Transitionalforms
Diictodon
Donninglargehead, strongarms
broad feet and broaderpaws
Fatty but flexibleindeed
With two long pointed teeth
Peepingout of mouth
It could walk likea crocodile
But lived by burrowing
In an underground bil !

10. Transitionalforms
Thrinaxodon
Carnivorusand nocturnal
With dog liketeeth
Of the sizeof foxes
With hairsall over
Remained hiddenin
Burrowall day long
Known also as ‘Trident tooth’
But havingboth dicuspid
and tricuspidteeth .
Roamed in ‘southAfrica.’
And ‘Antarctica’
DuringTriassicperiod.

12. Transitionalmammals
Exaeretodon
It is a relativelylargeCynodont
Of full sixfeet in size
Which roamed in Gondvana
The ancient supercontinent
In largeareas equivalentof
Modern Argentinaand India
As a vegetarian therapsid.
During Triassicperiod .

14. Transitionalforms
Bonacynodon
Very very small,tiny!
Hardlytwelve incheslong
A reptileof course!
But covered with hairsor fur
Havingteeth ,moustaches
Muscularmammaliannose
This little Therapsid
Was our grandfatherCynodon.
But how it looked like
Exactlyhow –who knows.

15. Transitionalforms Bonacynodon