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No gap in the Middle Permian record of terrestrial vertebrates

Michael J. Benton
No gap in the Middle Permian record of terrestrial vertebrates
Geology (Boulder) (March 2012) 40 (4): 339-342


During the Permian, tetrapods showed a major transition from basal synapsid-dominated faunas in the first half to therapsid-dominated faunas in the second. The transition was significant in marking the beginning of richer and more complex communities, a precursor to modern terrestrial ecosystems. This changeover may have been gradual or abrupt, but its study has been complicated by the postulated occurrence of a substantial hiatus in the fossil record, termed "Olson's Gap", which obscured the nature of the turnover. New evidence from redating of key tetrapod-bearing units of the American southwest and European Russia confirms that there is no gap in the fossil record of Permian tetrapods. Indeed, evidence for substantial sampling bias in the Permian tetrapod fossil record as a whole is queried.

ISSN: 0091-7613
EISSN: 1943-2682
Serial Title: Geology (Boulder)
Serial Volume: 40
Serial Issue: 4
Title: No gap in the Middle Permian record of terrestrial vertebrates
Author(s): Benton, Michael J.
Affiliation: University of Bristol, School of Earth Sciences, Bristol, United Kingdom
Pages: 339-342
Published: 20120302
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 41
Accession Number: 2012-035901
Categories: StratigraphyVertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: With GSA Data Repository Item 2012094; accessed on March 22, 2012
Illustration Description: illus. incl. 1 table, sect.
Source Medium: WWW
N33°34'60" - N37°00'00", W103°00'00" - W94°25'00"
S35°00'00" - S22°00'00", E16°00'00" - E33°00'00"
N51°00'00" - N56°00'00", E55°00'00" - E61°00'00"
N25°45'00" - N36°30'00", W106°30'00" - W93°30'00"
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: 201219
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