... anticline, 15 km south of Suhaitu ( Fig. 1 , star 2). The sponge described here is only the third genus of the lithistid orchoclad Chiastoclonellidae reported to date from China, and it is the first Ordovician genus of that family described from China. Actinocoelia Finks, 1960 , represented...

...). In this Atlantic association, new suborders (Sphaerocladina, Tricranocladina, Rhizomorina, Megamorina) and families (Hindiidae, Chiastoclonellidae, Astylospongiidae, Haplistiidae) radiated and later became common elements of Silurian sponge faunas. The tectonic uplift of the Appalachians during the Upper...