Kuanchuanpu Formation

Geological formation in China From Wikipedia, the free encyclopedia

The Kuanchuanpu Formation, occasionally reclassified as the Kuanchuanpu Member of the Dengying Formation, is a geologic formation located in Shaanxi province in China. It is one of the earliest Cambrian formations, dating right to the Ediacaran-Cambrian boundary. This formation preserves numerous meiofauna through Orsten-type preservation.

TypeGeological Formation
UnderliesGuojiaba Formation
OverliesDengying Formation
PrimaryLimestone
Quick facts Type, Underlies ...
Kuanchuanpu Formation
Stratigraphic range: Fortunian
TypeGeological Formation
UnderliesGuojiaba Formation
OverliesDengying Formation
Lithology
PrimaryLimestone
Location
RegionShaanxi
CountryChina
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Paleobiota

Animals

Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
 Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.
More information Animals, Genus ...
Animals
Genus Species Higher taxon Notes Images
Saccorhytus S. coronarius Ecdysozoa[1] Formerly misidentified as a deuterostome,[2] debated whether it is a scalidophoran larva or an adult ecdysozoan[3][4]
Saccorhytus reconstruction
Saccus S. necopinus, S. xixiangensis Ecdysozoa May resemble Saccorhytus as adults?[5]
Eolympia E. pediculata incertae sedis At different points claimed to be a sea anemone,[6] a ctenophore[7] or a scalidophoran worm.[8]
Eopriapulites E. sphinx Ecdysozoa A basal priapulid[8] or a stem-cycloneuralian[9]
Dahescolex D. kuanchuanpuensis Scalidophora Likely a stem-scalidophoran[9]
Zhongpingscolex Z. qinensis Kinorhyncha? Possibly a stem-group kinorhynch[10]
Eokinorhynchus E. rarus Kinorhyncha First described kinorhynch fossil[11]
Qinscolex Q. spinosus Scalidophora A stem-scalidophoran[12]
Shanscolex S. decorus Scalidophora A stem-scalidophoran[12]
Xinliscolex X. intermedius Scalidophora A stem-scalidophoran[13]
Feiyanella F. manica Cloudinidae Shows dichotomous branching and so likely reproduced asexually[14]
Sinaster S. petalon Cubozoa Likely a stem-cubozoan[15]
Hanagyroia H. orientalis Medusozoa Transitional between scyphozoans and cubozoans[16]
Primocyathus P. uniseriatus Archaeocyatha One of the earliest known sponges, and the earliest known archaeocyath[17]
Sinocyathus S. biseriatus Archaeocyatha One of the earliest known sponges, and the earliest known archaeocyath[17]
Protohertzina P. anabarica, P. unguliformis Protoconodonta An early protoconodont, included in Small Shelly Fossils[18]
Anabarites A. trisulcatus, A. rotundus[19] Anabaritidae Enigmatic small shelly fossil,[18] may be related to olivooids[20]
Conotheca C. subcurvata Orthothecida One of the earliest hyolith fossils known[18]
Siphogonuchites S. mirus, S. triangularis Siphogonuchitida Sclerite of a possible early mollusc?[18]
Lopochites L. quadrigonus, L. latizonalis Siphogonuchitida Sclerite of a possible early mollusc?[18]
Maikhanella M. multa Halkieriida? Cap-like shell, possibly of an early mollusc?[18]
Carinachites C. spinatus, C. platus[21] Conulatae Cnidarian sclerite, related to the conulariids[18][22]
Acanthocassis A. orthacanthus[18] incertae sedis May be cuticular ornaments?[23]
Xinlispina X. spinosa incertae sedis May be cuticular ornaments?[23]
Cambrothyra C. truncata[18] "Coeloscleritophora" Resembles chancelloriid sclerites[24]
Hexaconularia H. sp[18] Conulariida? An SSF allied with conulariids[25]
Punctatus P. emeiensis Eumetazoa A well-studied fossil from Kuanchuanpu,[26][27][28] may not be a cnidarian?[29]
Olivooides O. multisulcatus Olivooidae Possibly a cnidarian,[30][31][32] but may be a cycloneuralian instead[33]
Quadrapyrgites Q. quadratacris Olivooidae? Related to Olivooides and Punctatus,[26][34] likely a scyphozoan[35]
Octapyrgites O. elongatus Olivooidae A very large olivooid[36]
Qinscyphus Q. necopinus Scyphozoa[37][38] Underwent direct development[39]
Eolarva E. kuanchuanpuensis Cnidaria? Originally described as a cnidarian larva,[40] but reassigned to Ecdysozoa[3]
Pseudooides P. prima Cnidaria Originally thought to be a scalidophoran larva[41]
Decimoconularia D. anisfacialis Hexangulaconulariidae Formerly assigned to Hexaconularia[42]
Indeterminate limbed forms Unapplicable Bilateria Possibly lobopodians or annelids, preserved unusually through microbial colonisation[43]
Emeiconularia E. amplicanalis[21] Hexangulaconulariidae
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Microbes and Algae

More information Microbes and Algae, Genus ...
Microbes and Algae
Genus Species Higher taxon Notes Images
Calathophycus C. irregulatus Diaphoretickes incertae sedis Indeterminate cup-shaped alga, may be a fragment of a Dictyosphaeria-like form?[44]
Myxococcoides M. sp Cyanobacteria Mat-forming coccoid cyanobacterium[45]
Gloeodiniopsis G. lamellose Chroococcaceae Coccoid cyanobacterium[45]
Siphonophycus S. solidum, S. typicum, S. cf. septatum Oscillatoriales Filamentous cyanobacterium[45]
Endoconchia? ?E. sp incertae sedis Filaments growing on the inside of shelled fauna[45]
Palaeosiphonella P. sp Cyanobacteria Filamentous cyanobacterium[45]
Megathrix M. longus Oscillatoriaceae Filamentous cyanobacterium[45]
Girvanella G. problematica, G. wetheredii Oscillatoriaceae Filamentous cyanobacteria, formed small irregular mats[46]
Cambricodium C. capilloides Rivulariaceae Large filamentous cyanobacterium with a holdfast[46]
Archaeooides A. granulatus Diaphoretickes Formerly thought to be an animal egg[47]
Shaanisphaera S. spinosa Diaphoretickes Separated out from Archaeooides[47]
Qinlingisphaera Q. conica Diaphoretickes Separated out from Archaeooides[47]
Dahisphaera D. plana Diaphoretickes Separated out from Archaeooides[47]
Concavaesphaera C. ornata Eukaryota incertae sedis Multicellular acritarch, likely an independent evolution of multicellularity[48]
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References

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