Conodonts of the Mojcza Limestone

The Ordovician organodetrital limestones and marls studied in outcrops at Mojcza and Miedzygorz, Holy Cross Mts, Poland, contains a record of the evolution of local conodont faunas from the latest Arenig (Early Kundan, Lenodus variabilis Zone) to the Ashgill (Amorphognathus ordovicicus Zone ), with a single larger hiatus corresponding to the subzones from Eoplacognathus pseudoplanus to E. reclinatus. The conodont fauna is Baltic in general appearance but cold water genera, like Sagittodontina, Scabbardella, and Hamarodus, as well as those of Welsh or Chine se affinities, like Complexodus, Phragmodus, and Rhodesognathus are dominant in particular parts of the section while others common in the Baltic region, like Periodon, Eoplacognathus, and Scalpellodus are extremely rare. Most of the lineages continue to occur throughout most of the section enabling quantitative studies on their phyletic evolution. Apparatuses of sixty seven species of thirty six genera are described and illustrated. Phyletic evolution of Baltoniodus, Amorphognathus, Complexodus, and Pygodus is biometrically documented. Elements of apparatuses are homolog zed and the standard notation system is applied to all of them. Acodontidae fam. n., Drepanodus kielcensis sp. n., and D. santacrucensis sp. n. are proposed