Sentence examples for their fossil record from inspiring English sources

In general, insects are not well preserved down the ages, so their fossil record is patchy.

Because lampreys have a cartilaginous skeleton, their fossil record is very poor, and lampreys were previously thought to have evolved from the ostracoderms (extinct armoured jawless vertebrates).

In fact pterosaurs were remarkably good fliers and many were also superb on the ground, and their real limitation is that their fossil record is generally so poor.

Molecular dating suggests that glyptodonts diverged no earlier than around 35 million years ago, in good agreement with their fossil record.

According to BBC, unraveling the history and origin of modern lions has been difficult because of a gap in their fossil record.

Powers says she thinks their fossil record should be "a good proxy for studying the environmental effects of these mass extinctions".

Relatively little is known about the phylogenetic history of fungi because of a lack of their fossil records [ 17].

Modern hard corals (Class Hexacorallia; Order Scleractinia) are widely studied because of their fundamental role in reef building and their superb fossil record extending back to the Triassic.

The latest molecular data also suggest that modern orders of mammals arose and began to diversify about 104 million years ago--some 40 million years before their undisputed fossil record begins.

Further evaluation of extinction rates across labrid history is hampered by their poor fossil record.

Besides, their Iberian fossil record is vast and extensively documented [ 35].