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Helcionella ✝

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Source Data

Source	ID	Link
Global Biodiversity Information Facility ID (GBIF)	Not linked to a GBIF record.
PaleoBioDB ID (PBDB)	7856	https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=7856

Rank

genus (PBDB)

Taxonomy (PBDB)

Life : Animalia : Mollusca : Helcionelloida : Helcionellida : Helcionellidae : Helcionella

Classification
(PBDB,GBIF)

Rank	Name	Author
-	Eukaryota
-	Opisthokonta	Cavalier-Smith 1987
kingdom	Animalia
-	Bilateria
-	Eubilateria	Ax 1987
-	Protostomia	Grobben 1908
-	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca	Linnaeus 1758
class	Helcionelloida	Peel 1991
order	Helcionellida	Geyer 1994
superfamily	Helcionelloidea
family	Helcionellidae	Wenz 1938
genus	Helcionella	Grabau and Shimer 1909

Opinions (PBDB)

Name	Rank	Opinion	Evidence	Author
Helcionella	genus	belongs to Helcionellidae	stated with evidence	Wenz, 1938
Helcionella	genus	belongs to Cyrtonellida	stated without evidence	Bengtson, 1992
Helcionella	genus	belongs to Helcionellidae	stated without evidence	Feng et al., 2000
Helcionella	genus	belongs to Helcionelloida	second hand	Sepkoski, 2002
Helcionella	genus	belongs to Helcionellidae	stated with evidence	Gubanov et al., 2004
Helcionella	genus	belongs to Scenellidae	stated without evidence	Bouchet et al., 2005
Helcionella	genus	belongs to Helcionellinae	stated with evidence	Parkhaev and Demidenko, 2010
Helcionella	genus	belongs to Helcionellidae	stated without evidence	Jacquet and Brock, 2016

Status (PBDB)

extinct

Taxon Size (PBDB)

First Recorded Appearance

541 - 530 Ma
Cambrian

Last Recorded Appearance

501 - 485 Ma
Cambrian

Motility

slow-moving (based on Helcionellidae)

Vision

blind (based on Helcionelloida)

Diet

detritivore (based on Helcionellidae)

Ecospace Comments

DIMENSIONS & MORPHOLOGY: From Feng et al. (2000) and Gubanov et al (2004); based on Helcionella bellus and Helcionella atdabanica respectively.

Taphonomy

thin,minor ribbing (based on Helcionella)

Primary Reference (PBDB)

A. W. Grabau and H. W. Shimer. 1909. North American index fossils, invertebrates

Fossil Distribution

Subtaxa

Name	Status	Fossil Occurrences	Oldest	Youngest
Helcionella antiqua ✝ species	listed (PBDB)
Helcionella aspera ✝ species	listed (PBDB)
Helcionella capula ✝ species	listed (PBDB)	3	513 Ma Cambrian	505 Ma Cambrian
Helcionella explanata ✝ species	listed (PBDB)	6	541 Ma Cambrian	541 Ma Cambrian
Helcionella histosia ✝ species	listed (PBDB)	2	516 Ma Cambrian	516 Ma Cambrian
Helcionella kunyangensis ✝ species	listed (PBDB)
Helcionella lemdadensis ✝ species	listed (PBDB)	1	513 Ma Cambrian	513 Ma Cambrian
Helcionella radiata ✝ species	listed (PBDB)	3	541 Ma Cambrian	530 Ma Cambrian
Helcionella sidingshanensis ✝ species	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Helcionella subrugosa ✝ species	listed (PBDB)	5	516 Ma Cambrian	513 Ma Cambrian
Helcionella tianzhushanensis ✝ species	listed (PBDB)	1	530 Ma Cambrian	530 Ma Cambrian
Helcionella waageni ✝ species	listed (PBDB)	1	513 Ma Cambrian	513 Ma Cambrian
Helcionella xinjiangensis ✝ species	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Helcionella yunnanensis ✝ species	listed (PBDB)	2	520 Ma Cambrian	520 Ma Cambrian

Synonymy List

Year	Name and Author
1899	Pseudotheca Redlich
1909	Helcionella Grabau and Shimer
1938	Helcionella Wenz
1960	Helcionella Knight et al. p. 172
1976	Helcionella Runnegar and Jell p. 117
1992	Helcionella Bengtson p. 1027
2000	Helcionella Feng et al. p. 373

Year	Name and Author
2002	Helcionella Parkhaev p. 34
2002	Helcionella Sepkoski, Jr.
2004	Helcionella Gubanov et al. p. 207
2005	Helcionella Bouchet et al. pp. 86, 241
2010	Helcionella Parkhaev and Demidenko p. 1021
2016	Helcionella Jacquet and Brock

References

Grabau A. W., Shimer H. W. (1909) , North American index fossils, invertebrates, 1-909

Redlich K. The Cambrian Fauna of the Eastern Salt Range, Palaeontologia Indica 1, 1-11

Knight J. B., Cox L. R., et al (1960) Systematic descriptions, Treatise on Invertebrate Paleontology. Mollusca I 1, 169-339

Runnegar B., Jell P.A. (1976) Australian Middle Cambrian molluscs and their bearing on early molluscan evolution, Alcheringa 1 1/2, 109-132

Bengtson S. (1992) Proterozoic and earliest Cambrian skeletal metazoans, The Proterozoic Biosphere: A Multidisciplinary Study, 1017-1034

Feng W. M., Sun W. G., et al (2000) Earliest Cambrian monoplacophora in northeastern Yunnan with some new genera and species, Acta Micropalaeontologica Sinica 17, 365-377

Parkhaev P. Yu. (2002) Phylogenesis and the systematics of the Cambrian univalved mollusks, Paleontological Journal 35 1, 27-39

Sepkoski, Jr. J. J. (2002) A compendium of fossil marine animal genera, Bulletins of American Paleontology 363, 1-560

Gubanov A. P., Fernández-Remolar D.C., et al (2004) Early Cambrian molluscs from Sierra de Córdoba (Spain), Géobios 37 2, 199-215

Bouchet P., Rocroi J.-P, et al (2005) A nomenclator and classification of gastropod family-group names, Malacologia 47 1-2, 1-368

Parkhaev P. Y., Demidenko Y. (2010) Zooproblematica and mollusca from the Lower Cambrian Meishucun section (Yunnan, China) and taxonomy and systematics of the Cambrian small shelly fossils of China, Paleontological Journal 44 8, 883-1161 doi:10.1134/s0031030110080010

Jacquet S. M., Brock G. A. (2016) Lower Cambrian helcionelloid macromolluscs from South Australia, Gondwana Research 36, 333-358 doi:10.1016/j.gr.2015.06.012

Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!

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