Английская Википедия:Cetonoceras

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Шаблон:Short description Шаблон:Automatic taxobox

Cetonoceras is genus of ammonite that lived during the upper Pliensbachian stage of early Jurassic. Fossils of this genus were found in Italy, France, Spain, Portugal, Hungary and Austria.[1][2][3]

Description

First whorls of shell are depressed, but then they became rounded and more compressed. Primary ribs are strong and they are usually bifurcating. Secondary ribs are more delicate. Tubercules are present on ventrolateral positions in younger whorls, but they are diminishing on outer whorls. Similar genus is Reynesocoeloceras, but that one is lacking ribs bifurcations.[1][2]

References

Шаблон:Reflist

Шаблон:Taxonbar


Шаблон:Ammonitina-stub

  1. 1,0 1,1 Ошибка цитирования Неверный тег <ref>; для сносок Howarth2013 не указан текст
  2. 2,0 2,1 Blau, J., Meister C. (1991). Liassic (Pliensbachian) Ammonites from the Lienz Dolomites (Eastern Tyrol, Austria).
  3. Géczy, B., Meister, C. 1998. Les ammonites du Domérien de la montagne du Bakony (Hongrie). Revue de Paléobiologie 17(1):69-161