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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Canada
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Eastern Canada
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Quebec
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Anticosti Island (1)
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Europe
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fossils
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Primary terms
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biogeography (2)
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Canada
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Eastern Canada
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Quebec
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Anticosti Island (1)
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Europe
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Western Europe
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Scandinavia
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Sweden
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Gotland Sweden (1)
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Invertebrata
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Vermes
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Annelida (1)
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Polychaeta (1)
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scolecodonts (6)
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Paleozoic
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Ellis Bay Formation (1)
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Ordovician
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Middle Ordovician (1)
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Upper Ordovician
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Cincinnatian
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Richmondian (1)
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Hirnantian (1)
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Katian (1)
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Kope Formation (1)
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Trentonian (1)
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Whitewater Formation (1)
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Silurian
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Lower Silurian (1)
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palynomorphs
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Chitinozoa (1)
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United States
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Indiana
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Franklin County Indiana (2)
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Kentucky
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Ohio
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Oklahoma
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Hadoprion cervicornis
Scolecodont systematics exemplified by the polychaete Hadoprion cervicornis (Hinde, 1879)
Scanning electron microscope photos of selected scolecodonts. Scale bars 0....
JAWED POLYCHAETES FROM THE UPPER SYLVAN SHALE (UPPER ORDOVICIAN), OKLAHOMA, USA
Late Ordovician jaw-bearing polychaetes from Anticosti Island, eastern Canada, and their biogeographic significance
Review of Scolecodonts Assigned to Arabellites , Based on Hinde's (1879) Type Material
LATE ORDOVICIAN JAWED POLYCHAETE FAUNAS OF THE TYPE CINCINNATIAN REGION, U.S.A
Figure 5 —Selected SEM micrographs of representative and characteristic sc...
Figure 7 —SEM micrographs of selected scolecodonts from the Sylvan Shale. ...
SILURIAN RAMPHOPRIONID POLYCHAETES FROM GOTLAND, SWEDEN
Abstract Eunicidan polychaetes formed a significant part of Early Palaeozoic marine invertebrate communities, as shown by the abundance and diversity of scolecodonts (polychaete jaws) in the fossil record. In this study we summarize the early radiation and biodiversity trends and discuss the palaeobiogeography of these fossils. The oldest (latest Cambrian–Early Ordovician) representatives had primitive, usually symmetrical, placognath/ctenognath type jaw apparatuses. The first more advanced taxa, possessing labidognath-type jaw apparatuses or placognath apparatuses with compound maxillae, are first recorded in the Middle Ordovician. The most significant increase in generic diversity occurred in the Darriwilian, when many common taxa appeared and diversified. The Ordovician and Silurian scolecodont occurrences allow some palaeobiogeographical units and distribution patterns to be explored and outlined. The most robust data presently at hand derive from successions in Baltica and Laurentia. That information, together with new records from other palaeocontinents, reveals a wide distribution for the most frequent and species-rich genera and families, similar to the biogeographical patterns of extant polychaetes. Like many other benthic and pelagic fossil groups, scolecodont-bearing polychaetes show an increased cosmopolitan character in the Silurian as compared with the Ordovician. Species-level endemism appears to be relatively common, inferring a potential for scolecodonts as biogeographical tools in the future.