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Pachydiscus is an extinct genus of ammonite from the Late Cretaceous and Early Paleocene with a worldwide distribution, and type for the desmoceratacean family Pachydiscidae. The genus' type species is P. neubergicus. Altogether some 28 species have been described. The shell of Pachydiscus is compressed and high-whorled, with an oval or flat sided section. Ribs tend to be differentiated into short umbilical and separate ventro-lateral sets, with a smooth area between. Some Hungarian specimens of this genus reached 40 cm (16 in) in diameter.

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rdf:type
rdfs:label
  • Pachydiscus (it)
  • Pachydiscus (en)
  • Pachydiscus (nl)
  • Pachydiscus (pl)
  • 粗碟菊石 (zh)
rdfs:comment
  • Pachydiscus è un genere estinto di mollusco cefalopode appartenente alle ammoniti, vissuto nel Cretaceo Superiore, dal Campaniano al Maastrichtiano. Si tratta di uno degli ultimi generi di ammonoidi evolutisi prima dell'estinzione totale del gruppo, avvenuta intorno al passaggio tra Cretaceo e Paleocene. È un importante fossile guida per il Cretaceo terminale, e in particolare la prima comparsa della specie P. (Pachydiscus) neubergicus Hauer (1858), indice di biozona, rappresenta il criterio accettato internazionalmente per il riconoscimento del Maastrichtiano inferiore. Il nome generico significa “disco robusto”, dal greco pachys (παχὐς) = robusto; discos (δἰσκος) = disco. (it)
  • Pachydiscus is een uitgestorven geslacht van mollusken, dat leefde tijdens het Laat-Krijt. (nl)
  • Pachydiscus – rodzaj głowonogów z wymarłej podgromady amonitów, z rzędu Ammonitida. Żył w okresie późnej kredy (santon - mastrycht). (pl)
  • 粗碟菊石(學名:Pachydiscus),又名厚盤菊石、厚圓盤菊石,是生存於晚白堊紀的一屬菊石,生活在開闊的海域中,游水能力很強。本屬下包括有菊石界中的巨物,殼長達2公尺。國際地層委員會將本屬下Pachydiscus neubergicus化石的訂為白堊紀馬斯垂克期開始的標誌。 (zh)
  • Pachydiscus is an extinct genus of ammonite from the Late Cretaceous and Early Paleocene with a worldwide distribution, and type for the desmoceratacean family Pachydiscidae. The genus' type species is P. neubergicus. Altogether some 28 species have been described. The shell of Pachydiscus is compressed and high-whorled, with an oval or flat sided section. Ribs tend to be differentiated into short umbilical and separate ventro-lateral sets, with a smooth area between. Some Hungarian specimens of this genus reached 40 cm (16 in) in diameter. (en)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/Pachydiscus_neubergicus.jpg
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