ammonoid

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Related to ammonoid: ammonite, Ammonoidea

ammonoid

[′a·mə‚nȯid]

(paleontology)

A cephalopod of the order Ammonoidea.

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References in periodicals archive ?

Tithonian ammonoid biostratigraphy in eastern Himalayan Tibet // Geobios-Lyon.

Sea-level changes recorded by cerium anomalies in the Late Jurassic (Tithonian) black rock series of Qiangtang basin, north-central Tibet

(1) Ammonoids have an exceptionally good fossil record.

About the cover

It was his work in the Canadian Arctic Islands, beginning in 1954, that laid the foundation for his subsequent brilliant career as a paleontologist and biostratigrapher specializing in the now-extinct class of coiled, marine molluscs known as ammonoids.

Edward Timothy Tozer (1928-2010)

During the Devonian Period, the ammonoid cephalopods radiated and diversified and they survived repeated episodes of mass extinction followed by rapid diversification.

Functional morphology at the mall

Function of complexly fluted septa in ammonoid shells I.

Cuttlebone Morphology Limits Habitat Depth in Eleven Species of Sepia (Cephalopoda: Sepiidae)

This is the most prolific formation in terms of ammonoid content of all the lithostratigraphic units studied (e.g., Moreno-Bedmar et al., 2010a).

Lower Cretaceous (Hauterivian-Albian) ammonite biostratigraphy in the Maestrat Basin (E Spain)

The high values of redox and palaeoproductivity proxies of the studied section are very well correlated by ammonoid biostratigraphy with condensed lithofacies from outer-shelf to upper slope environments of the Internal Prebetic (Oloriz et al, 2002; 2004).

Comparison of benthic foraminifera and geochemical proxies in shelf deposits from the Upper Jurassic of the Prebetic (southern Spain)/Comparacion entre foraminiferos bentonicos e indicadores geoquimicos en depositos de plataforma del Jurasico superior del Prebetico (Sur de Espana)

The Calasparra section has a well-established biostratigraphy thanks to an ammonoid biozonation that ranges from Upper Anisian (Illyrian) to Upper Ladinian (Longobardian) The continuous occurrence of P.

Discussion about the stratigraphic range of Pseudofurnishius murcianus van den Boogaard (Conodonta) in the Iberian Peninsula, from the Calasparra section (Murcia, Spain)/Discusion sobre la distribucion estratigrafica de Pseudofurnishius murcianus van den Boogaard (Conodonta) en la Peninsula Iberica, a partir de la seccion de Calasparra (Murcia, Espana)

These authors maintain that the ammonoid diversity was primarily controlled by changes in the marine environments.

Cephalopod assemblages and depositional sequences from the upper Cenomanian and lower Turonian of the Iberian Peninsula (Spain and Portugal)/ Asociaciones de cefalopodos y secuencias deposicionales en el Cenomaniense superior y Turoniense inferior de la Peninsula Iberica (Espana y Portugal)

(2006): The Early Triassic ammonoid recovery: paleoclimatic significance of diversity gradients.

El limite Permico-Triasico y la sedimentacion durante el Triasico inferior en las cuencas de Europa occidental: una vision general

The Liostrea species were found attached to Ammonoids at the shores of Pangea Sea (Greenland), the Salt Range (Pakistan), and Spiti (India), living in open euhaline waters.

DIVERSITY AND EVOLUTION OF LIVING OYSTERS

The stratigraphically valuable invertebrates, ammonoids, are missing in those deposits, and conodonts are very rare, being represented by a shallow-water polygnathid assemblage.

The Borschovo section of the Gauja and Amata regional stages (Leningrad Region, Russia): sedimentology and biostratigraphy