Heteromorphs are ammonoids forming a conch with detached whorls (open coiling) or non‐
planispiral coiling. Such aberrant forms appeared convergently four times within this extinct …

Fraud occurs frequently in the fishery and aquatic product markets. Therefore, the
authentication of fishery and aquatic products has become a crucial issue. Recently …

Carbonate skeletons of fossil marine organisms are widely used to reconstruct
palaeoceanographic parameters. Specifically, the geochemistry of Jurassic and Cretaceous …

Oxygen isotope ratios of the core region of otoliths were examined in Anguilla japonica
glass eels collected from two rivers in Japan to verify the possible temperature and depth …

Rationale Stable oxygen isotope ratios (δ18O values) measured in fish otoliths can provide
valuable detailed information on fish life history, fish age determination, and ocean …

Fossil oral ejecta that exclusively contain bivalved calcitic lower jaws of ammonites (=
aptychi) from Late Jurassic Solnhofen-type deposits of southern Germany are described …

Oxygen isotopes are a versatile tool to address a wide range of questions in the Earth
sciences. Applications include geothermometry, paleoclimatology, tracing of geochemical …

This study aimed to reconstruct temperatures experienced during the larval period by adult
Pacific bluefin tuna Thunnus orientalis using high-resolution otolith stable oxygen isotope (δ …

Thrombolites are buildups of carbonate that exhibit a clotted internal structure formed
through the interactions of microbial mats and their environment. Despite recent advances …

The oxygen isotope (δ 18 O) compositions of final chamber fragments of individual shells of
the planktic foraminifer Orbulina universa were measured in situ via secondary ion mass …