List of Xiaoshiba Biota species

This is a list of the fossils found within the Xiaoshiba Biota.

The Xiaoshiba Biota is a lagerstätte from south China, belonging to the Hongjingshao Formation.

It dates to roughly 514 mya, near the end of Cambrian Stage 3.

This interval lies between the more famous Maotianshan Shales and Burgess Shale in age.

Around 200 specimens Similar to Selkirkia in appearance, likely generalistic in diet[2] 13 specimens[3] Palaeoscolecid Three mostly complete specimens[4] Related to Acinocricus from North America Hundreds of oral cones, several frontal appendages[5] Largest animal of the Cambrian, related to Pambdelurion from Greenland Around 40 specimens Fuxianhuiid, one specimen preserved while moulting[6] Numerous specimens Fuxianhuiid Numerous specimens Fuxianhuiid Six specimens Indeterminate arthropod, likely a fuxianhuiid[8] Multiple complete specimens First pair of appendages specialised for predation, carapace serrated[9] 12 specimens of P. paraspatiosa, 19 specimens of P. spatiosa, 2 specimens of P. eurypetala and one specimen of P. inopinata[10] All species of Pectocaris present One partial specimen Unclear whether it belongs to the genus due to its fragmentary nature[10] Two specimens Smaller tail fluke than other species[11] Numerous specimens of all ages Synonymous with “Parazhangshania”[12] Four specimens Basal artiopod, related to Acanthomeridion[13] One mostly complete fossil Earliest fossil of a burrowing annelid known[14] Six specimens Lacks spines, unlike W. corrugata[15] Two specimens Three specimens Eight specimens Thirty-five specimens Twelve specimens Assignment to the genus dubious due to differing preservation methods[17]