''Sinotubulites'' is a
genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...
of small, tube-shaped shelly fossils from the
Ediacaran period. It is often found in association with ''
Cloudina''.
Its tube has a "tube-in-tube" structure composed of several thin layers. It bears prominent longitudinal sculptures and / or irregular rings, which were formed by the wrinkles of tube layers, and weaken gradually towards the inner layers.
The organism probably had a sessile life-style, lying on the sea floor.
''Sinotubulites'' and ''Cloudina'' (discovered in 1972) are currently the two earliest known fossils of organisms that mineralized shells when alive, and are often found in the same fossil beds. It is remarkable that ''Cloudina'' specimens often have tiny holes bored in them, which are attributed to predators, while no such borings have been found in ''Sinotubulites''. This suggests that ''Sinotubulites'' had evolved features that made it a much less attractive target than ''Cloudina''. As a result, both organisms are important in analyses of the
Cambrian explosion, as predation and the appearance of mineralised components are often cited as possible causes of the "explosion".
See also
* ''
Corumbella''
* ''
Saarina''
* ''
Somatohelix''
*
List of Ediacaran genera
This is a list of all described Ediacaran genera, including the Ediacaran biota. It contains 227 genera.
References
{{reflist, 30em
*
Ediacaran
The Ediacaran Period ( ) is a geological period that spans 96 million years from the end ...
References
Prehistoric marine animals
Ediacaran life
Fossils of China
Fossils of Mexico
Enigmatic prehistoric animal genera
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