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.

Genus	Species	Material	Notes	Images
Paraselkirkia	P. sinica^[1]	Around 200 specimens	Similar to Selkirkia in appearance, likely generalistic in diet^[2]	Reconstruction of Paraselkirkia
Mafangscolex	M cf. yunnanensis	13 specimens^[3]	Palaeoscolecid

Genus	Species	Material	Notes	Images
Collinsium	C. ciliosum	Three mostly complete specimens^[4]	Related to Acinocricus from North America
Omnidens	O. amplus ("Omnidens qiongqii" is likely synonymous ^[5])	Hundreds of oral cones, several frontal appendages^[6]	Largest animal of the Cambrian, related to Pambdelurion from Greenland	A partial mouth apparatus of Omnidens, alongside a small trilobite

Genus	Species	Material	Notes	Images
Alacaris	A. mirabilis	Around 40 specimens	Fuxianhuiid, one specimen preserved while moulting^[7]	Reconstruction of Alacaris
Chengjiangocaris	C. kunmingensis^[8]	Numerous specimens	Fuxianhuiid	Reconstruction of Chengjiangocaris
Fuxianhuia	F. xiaoshibaensis^[8]	Numerous specimens	Fuxianhuiid	Reconstruction of Fuxianhuia
Lihuacaris	L. ferox	Six specimens	Indeterminate arthropod, likely a fuxianhuiid^[9]

Genus	Species	Material	Notes	Images
Clypecaris	C. serrata	Multiple complete specimens	First pair of appendages specialised for predation, carapace serrated^[10]	Reconstructions of Clypecaris serrata
Pectocaris	P. paraspatiosa P. eurypetala P. spatiosa P. inopinata	12 specimens of P. paraspatiosa, 19 specimens of P. spatiosa, 2 specimens of P. eurypetala and one specimen of P. inopinata^[11]	All species of Pectocaris present	Pectocaris species. Left to right, top to bottom: P. spatiosa, P. erypetala, P. inopinata, P. paraspatiosa
Jugatacaris?	J. sp?	One partial specimen	Unclear whether it belongs to the genus due to its fragmentary nature^[11]	Reconstruction of Jugatacaris

Genus	Species	Material	Notes	Images
Sidneyia	S. minor	Two specimens	Smaller tail fluke than other species^[12]	Reconstruction of Sidneyia minor
Zhangshania	Z. typica	Numerous specimens of all ages	Synonymous with "Parazhangshania"^[13]
Zhiwenia	Z. coronata	Four specimens	Basal artiopod, related to Acanthomeridion^[14]

Scalidophora

Genus^[17]	Species	Material
Doulia	D. rara	Two specimens
Eolaminaria	E. simigladiola	Three specimens
Rugophyca	R. longa	Eight specimens
Singulariphyca	S. ramosa	Thirty-five specimens