Cynodont

Description

GS PAPER III: Conservation, environmental pollution and degradation, environmental impact assessment.

Context: The researchers from the Indian Institute of Technology Kharagpur, used scanning electron microscopy to study about 10 teeth samples collected from the village of Tihki in Shahdol District, Madhya Pradesh.

The teeth were studied and compared with previously reported cynodonts.
The results showed that they had found a new species, and they named it Rewaconodon indicus, indicating India.
This vertebrate fossils, has yielded a new species and two genera of cynodonts, small rat-like animals that lived about 220 million years ago.
The team also identified two new genera from the area. The first was named Inditherium floris, after India and the Latin word therium meaning beast.
The second was named Tikiodon cromptoni, after Tiki Formation and Greek word odon meaning tooth.

Evolutionary link

Cynodonts are important in evolutionary studies as this group ultimately gave rise to the present-day mammals.
By studying their molar and premolar teeth, we see how they slowly evolved and modified.
Their crown shape shows that these animals are actually intermediate forms that are very near to the mammalian line of evolution.
Cynodonts and living mammals both belong to a group of egg-laying vertebrates (amniotes) called
The close relationship of cynodonts with living mammals is seen in their bones.
They also have differentiated teeth ( for example, different teeth in the front of mouths compared with the back), a secondary palate in their mouths, which, like humans, allowed them to breathe and eat at the same time.
Some cynodonts show evidence for the inferred presence of whiskers and fur.
About eighty cynodont genera have been reported from around the world.
The ones similar to the newly discovered ones were previously found in Laurasia which includes North America, England, Germany, Switzerland, France, and Belgium.
This possibly suggests abiotic interchange between India and Laurasian regions and/or similarity in paleoclimatic conditions, but this requires further study,