tribosphenic उदाहरण वाक्य

In modern tribosphenic molars, the trigonid is towards the front of the jaw and the talonid towards the rear.
The molars " bear striking resemblance to the tribosphenic pattern characteristic of living therians . . . " ( Pascual ).
The earliest marsupial and placental mammals and their kin all had tribosphenic teeth capable not only of cutting, but also grinding.
The design that is considered one of the most important characteristics of mammals is a three-cusped shape called a tribosphenic molar.
However, the pseudo-tribosphenic molars from the new fossil shows that similar structures to combine cutting and grinding had evolved several times.

The p4 and molars have a distinct trigonid ( a triangular group of cusps at the front of a tribosphenic tooth ) and talonid.
Because tribosphenic teeth are such a unique and intricate structure, paleontologists once believed that there must have been a single origin in the Mesozoic.
The discovery of " Ambondro " was thought to extend the known temporal range of tribosphenic mammals 25 million years further into the past.
The scientists said the dual north-south evolution of the advanced tribosphenic teeth occurred after the supercontinent of Pangea split into southern and northern continents about 160 million years ago.
This is awkward because tribosphenic molars are commonly found in most therian mammals ( there exist some exceptions such as anteaters and some whales, which have no teeth at all ).