A re-investigation of the Rhabdinopora flabelliformis fauna from the early Tremadocian 'Dictyonema Shale' in Belgium

作者：Wang, Wenhui^*; Servais, Thomas

来源：Geologica Belgica, 2015, 18(1): 66-77.

• Rhabdinopora flabelliformis fauna
• early Tremadocian
• Belgium
• Systematic Palaeontology
• Biostratigraphy
• Correlation

During a period of almost 150 years, the diverse Rhabdinopora flabelliformis fauna from the Tremadocian (Early Ordovician) of Belgium has been collected from both the Brabant Massif and the Stavelot and Rocroi Inliers ('Ardenne Massifs'), and in a single borehole from the Condroz Inlier. In the present study, the large collections of the Royal Belgian Institute of Natural Sciences (Brussels) are revised and re-described in the light of present-day graptolite taxonomy. The taxa Rhabdinopora praeparabola, Rhabdinopora flabelliformis flabelliformis, R. f. anglica, R. f. socialis, R. f. norvegica and R. f. parabola have been identified. Based on our taxonomical revision, the early Tremadocian Rhabdinopora praeparabola, R. f. parabola and R. f. anglica graptolite biozones are recognized in the Brabant Massif, allowing correlation with other graptolitic successions worldwide. At the level of regional biostratigraphy, the boundary between the Mousty Formation and the Chevlipont Formation in the Brabant Massif can now be precisely located in the R. praeparabola graptolite Biozone, while the boundary between the Solwaster Member (Sm1a) and the Spa Member (Sm1b) of the Jalhay Formation in the Stavelot Inlier (Ardenne) is located within the R. f. anglica Biozone. All the Rhabdinopora flabelliformis fauna levels can be attributed to Time-Slice la of the lower Tremadocian.

• 出版日期2015
• 单位中国科学院南京地质古生物研究所; 南京大学