1995/03/01 by Jane R. Rigby, J. Keith Rigby, Fan Jiasong +1
Earth and Planetary Sciences · Materials Science · #Paleontology and Stratigraphy of Fossils #Paleontology and Evolutionary Biology #Diatoms and Algae Research
paper · doi:10.1017/s0022336000034570
Well-preserved silicified sponges have been recovered from the Upper Permian Changxing Formation at Huangnitang in western Hubei province. The new species Cystauletes grossa and Cystothalamia irregulara are associated with Cystothalamia sp., Colospongia salinaria irregularis Zhang, 1983, Sollasia ostiolata Steinmann, 1882, Virgola ? osiensis (de Gregorio, 1930), a questionable inozoan species, and a form questionably referred to the genus Hikorodium ? sp. These sponges were detrital fragments that accumulated at the toe of the forereef, at the margin of slope fades and basin fades, at Huangnitang. Amblysiphonella vesiculosa minima Zhang, 1983, is represented in the collections from the Upper Permian Heshan Formation at the village of Guwu, near Heshan City in central Guangxi. Heshan beds that produced the silicified sponges are of Wujiapingian age and accumulated on a normal-marine, shallow-water carbonate platform, or in skeletal shoals within the carbonate platform, and represent a level-bottom community.