New Ordovician genera of polychaete jaw apparatuses
Zofia Kielan-Jaworowska
Five new Middle and Upper Ordovician gener a of polychaete jaw apparatuses from the erratic boulders of Poland are described. All are recorded within the superfamily Eunicea, Atraktoprion n. gen. and Skalenoprion n. gen. being of prionognatha type, Kalloprion n. gen. and Ramphoprion n. gen. of labidognatha type, Xanioprion n. gen. represents a new, so far unknown type of apparatus. Some new terms are introduced and there is a discussion on the numbering
and homology of the jaws in some recent and fossil eunicid apparatuses.
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