LATE DEVONIAN (FRASNIAN) ASTEROPYGINE TRILOBITES FROM THE FRASNES AREA, SOUTHERN BORDER OF DINANT SYNCLINORIUM, BELGIUM.

The Frasnian representatives of Asteropyginae in the Frasnes area (south Belgium) have long been relatively well-documented when compared to other trilobites in the Devonian of the Ardennes (Belgium, northern France). However, examination of the type material and new collecting by the authors indicate that a taxonomic review has become necessary. Two new species of Bradocryphaeus are recorded, B. vanherlei sp. nov. and B. neptuni sp. nov.; one additional species, B. sp. 20, is known from the pygidium alone. New material is recorded of Bradocryphaeus maillieuxi ( Richter & Richter), which has hitherto been scantily illustrated in the literature. The cephalon of Heliopyge helios (Richter & Richter) is redescribed on the basis of new specimens and its holotype pygidium refigured. [ABSTRACT FROM AUTHOR]