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Late Ordovician jawed polychaete faunas of the type Cincinnatian region, U.S.A.

Mats Eriksson and Claes F. Bergman
Late Ordovician jawed polychaete faunas of the type Cincinnatian region, U.S.A.
Journal of Paleontology (May 2003) 77 (3): 509-523


Late Ordovician jawed polychaete (Annelida) faunas from the type Cincinnatian region in the tri-state area of Indiana, Ohio, and Kentucky, North America, are discussed on the basis of an extensive and unique collection of more than 50,000 well-preserved scolecodonts. Approximately 40 to 50 multi-element species belonging to a dozen families are identified. Scolecodonts of polychaetes with prionognath, and particularly labidognath, type of jaw apparatus markedly dominate, whereas those of placognath and ctenognath taxa are very rare. The most common and/or characteristic genera include Oenonites Hinde, 1879; Kettnerites Zebera, 1935; Atraktoprion, Kielan-Jaworowska, 1962; Ramphoprion Kielan-Jaworowska, 1962; Protarabellites Stauffer, 1933a; Kalloprion, Kielan-Jaworoska, 1962; Leptoprion, Kielan-Jaworowska, 1966; Hadoprion Eriksson and Bergman, 1998; Mochtyella Kielan-Jaworowska, 1961; and Tetraprion? Kielan-Jaworowska, 1966. Members of the family Polychaetaspidae, particularly Oenonites species, generally dominate in abundance and number of species. The second most abundant family typically is either Ramphoprionidae or Paulinitidae. Overall, the taxonomic diversity seems to increase from the deeper water, shale-dominated, Edenian Kope Formation and upward in the succession to the shallower water, limestone-dominated, Richmondian Whitewater Formation. Five more or less distinct scolecodont associations were identified that are of potential biostratigraphic utility. Most families and genera identified have intercontinental distribution and can be identified also in approximately coeval strata of the Baltic paleocontinent. However, the faunal composition differs between these regions, especially at the species level.

ISSN: 0022-3360
EISSN: 1937-2337
Serial Title: Journal of Paleontology
Serial Volume: 77
Serial Issue: 3
Title: Late Ordovician jawed polychaete faunas of the type Cincinnatian region, U.S.A.
Affiliation: University of Lund, Department of Geology, Lund, Sweden
Pages: 509-523
Published: 200305
Text Language: English
Publisher: Paleontological Society, Lawrence, KS, United States
References: 103
Accession Number: 2003-056743
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Includes appendix
Illustration Description: illus. incl. 1 plate, geol. sketch map
N38°30'00" - N40°00'00", W85°30'00" - W84°00'00"
Secondary Affiliation: Kristianstad University, SWE, Sweden
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 200318
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