Fossil caddis cases from the lower Eocene Huachong Formation of the Sanshui Basin, Foshan City, Guangdong Province, South China with detrital zircon analyses

Here we describe for the first time the insect (trace) fossils from the lower Eocene Huachong Formation at the Sanshui Basin in Foshan City, Guangdong Province, South China. Three specimens of caddis cases display different morphologies, but all of them are constructed using mainly ostracods. The detrital zircon from a layer below the fossil bed is studied. Our isotopic chronological analyses of the detrital zircons reveal at least four phases of volcanic activities in this area during the Phanerozoic.

Automated summary

In this study, we report the first discovery of insect (trace) fossils from the lower Eocene Huachong Formation in the Sanshui Basin, Foshan City, Guangdong Province, South China. Three specimens of caddis cases were found, displaying different morphologies and mainly constructed using ostracods. Additionally, isotopic chronological analyses of detrital zircons revealed four phases of volcanic activities in this area during the Phanerozoic.