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Last Science News

Zbiorcza ilustracja z dziewięciu mniejszych pokazująca przekroje muszli ślimaka w różnym powiększeniu spod mikroskopu
 

Coatings on shells from hydrothermal vents

Shells of marine gastropods from hydrothermal vent environments are coated with inorganic materials of unknown composition. Conversely, their fossil equivalents are known exclusively from outer moulds in pyrite (FeS2), with no shell material left.

Blokdiagram przedstawiający wycinek dna z zaznaczonymi strukturami - cementami węglanowymi, kolor szary z białym.
 

Methanogenic carbonates

Methane (CH4) is largely built from the light carbon isotope (12C). When emitted from the seabed, methane is oxidized by sediment-dwelling microorganisms, with one of the byproducts being methanogenic carbonate cements, themselves with large amounts of the 12C.

Zbiorcza fotografia pokazująca 7 fragmentów ośródek amonitów z widoczną linią lobową, kolor biały z żółtym na czarnym tle.
 

Ammonites survived across the Cretaceous–Paleogene boundary

Ammonites, extinct cephalopods dominant in Mesozoic marine ecosystems, are often listed amongst victims of the end-Cretaceous mass extinction (66 Ma).

 

Rudists: Extreme climate witnesses

Rudists, extinct bivalves with massive shells, built vast reefs in the tropical Cretaceous seas.

 

Crinoids with unusual morphology

In the prestigious series Treatise on Invertebrate Paleontology, a chapter was released that synthesizes data on the functional morphology and paleoecology of crinoids with unusual morphologies.

 

The direct ancestor of cowries

A taxonomic revision of the extinct genus Zittelia from Jurassic sediments made it possible to trace a gradual evolutionary change in shell morphology…

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