The fauna of Luoping appears to have been preserved in a small intraplatform basin instead of the surrounding open water, judging by the anoxic sediments present at the site. Out of 19,759 specimens, 93.7% of the fossils found at Luoping are arthropods: decapods, isopods, crab-like cycloids, shrimp-like mysidaceans, clam shrimp, and ostracods, as well as rare millipedes and horseshoe crabs. By comparison, only 0.07% of specimens come from marine reptiles, which include "Dinocephalosaurus" alongside "Mixosaurus cf. panxianensis", "Dianopachysaurus dingi", "Sinosaurosphargis yunguiensis", and an archosaur. Otherwise, fish including saurichthyids, palaeoniscids, birgeriids, perleidids, eugnathids, semionotids, pholidopleurids, peltopleurids, and coelacanths have been found at Luoping, forming 3.66% of fossils with 25 taxa in 9 families. Molluscs such as bivalves and gastropods, along with ammonoids and belemnoids, account for 1.69% of specimens. Rare and probably non-endemic fossils also include echinoderms such as crinoids, starfish, and sea urchins; branchiopods; and relatively complete conifer branches and leaves, which probably originated from coastal forests less than away.