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all geography including DSDP/ODP Sites and Legs
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Protarabellites
Taxonomic discussion of the scolecodont genera Nereidavus Grinnell, 1877, and Protarabellites Stauffer, 1933 (Annelida, Polychaeta)
SILURIAN RAMPHOPRIONID POLYCHAETES FROM GOTLAND, SWEDEN
Figure 6 — Protarabellites rectangularis n. sp. from sample 90-K2CB, Klin...
Figure 7 — Protarabellites staufferi n. sp. from sample 83-12LJ, Närsham...
Figure 8 — 1–16, 20, 21, Protarabellites triangularis n. sp.; 17, 18, 22...
Figure 10 —TEM microscans of a right MI, LO 8219, of Protarabellites tria...
Polychaete palaeoecology in an early Late Ordovician marine astrobleme of Sweden
LATE ORDOVICIAN JAWED POLYCHAETE FAUNAS OF THE TYPE CINCINNATIAN REGION, U.S.A
SCOLECODONTS: I. DESCRIPTIVE TERMINOLOGY AND REVISION OF SYSTEMATIC NOMENCLATURE; II. LECTOTYPES, NEW NAMES FOR HOMONYMS, INDEX OF SPECIES
Ordovician Fossils From Upper Part of Type Section of Deadwood Formation, South Dakota
Figure 3 — 1–6 , Reconstructed jaw apparatuses (exploded) of the main ramp...
Review of Scolecodonts Assigned to Arabellites , Based on Hinde's (1879) Type Material
Figure 1 —Map of Gotland showing the geographic distribution of ramphoprio...
JAWED POLYCHAETES FROM THE UPPER SYLVAN SHALE (UPPER ORDOVICIAN), OKLAHOMA, USA
Vagrant benthos (Annelida; Polychaeta) associated with Upper Ordovician carbonate mud-mounds of subsurface Gotland, Sweden
First Record of Megaramphoprion (Annelida; Polychaeta) in Laurentia
Figure 7 —SEM micrographs of selected scolecodonts from the Sylvan Shale. ...
Figure 5 —Selected SEM micrographs of representative and characteristic sc...
A Late Ordovician age for the Whirlpool and Power Glen formations, New York
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.