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Belemnite extinction and the origin of modern cephalopods 35 m.y. prior to the Cretaceous-Paleogene event

Yasuhiro Iba, Joerg Mutterlose, Kazushige Tanabe, Shin-ichi Sano, Akihiro Misaki and Kazunobu Terabe
Belemnite extinction and the origin of modern cephalopods 35 m.y. prior to the Cretaceous-Paleogene event
Geology (Boulder) (May 2011) 39 (5): 483-486

Abstract

Belemnites, a very successful group of Mesozoic cephalopods, flourished in Cretaceous oceans until the Cretaceous-Paleogene event, when they became globally extinct. Following this event the modern types of cephalopods (squids, cuttlefish, octopus) radiated in the Cenozoic in all oceans. In the North Pacific, however, a turnover from belemnites to the modern types of cephalopods about 35 m.y. before the Cretaceous-Paleogene event documents a more complex evolutionary history of cephalopods than previously thought. Here we show that the modern types of cephalopods originated and prospered throughout the Late Cretaceous in the North Pacific. The mid-Cretaceous cephalopod turnover was caused by cooling and the closure of the Bering Strait, which led to a subsequent faunal isolation of this area. In the Late Cretaceous the former niches of the fast-swimming belemnites were taken over by the modern types of cephalopods, which evolved endemically. The Cretaceous-Paleogene event only allowed the modern types of cephalopods to spread globally and to take over the niches previously held by belemnites.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 39
Serial Issue: 5
Title: Belemnite extinction and the origin of modern cephalopods 35 m.y. prior to the Cretaceous-Paleogene event
Affiliation: Ruhr-Universitaet Bochum, Institut fuer Geologie, Mineralogie und Geophysik, Bochum, Germany
Pages: 483-486
Published: 201105
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 35
Accession Number: 2011-046139
Categories: StratigraphyInvertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: With GSA Data Repository Item 2011153
Illustration Description: illus. incl. strat. cols., sketch map
N30°00'00" - N45°00'00", E129°00'00" - E147°00'00"
Secondary Affiliation: University of Tokyo, JPN, JapanFukui Prefectural Dinosaur Museum, JPN, JapanKitakyushu Museum of Natural History and Human History, JPN, JapanArabian Oil Company, JPN, Japan
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201126
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