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Cyrtodiscus ✝

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Source Data

Source	ID	Link
Global Biodiversity Information Facility ID (GBIF)	Not linked to a GBIF record.
PaleoBioDB ID (PBDB)	87584	https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=87584

Rank

genus (PBDB)

Taxonomy (PBDB)

Life : Animalia : Mollusca : Gastropoda : Bellerophontida : Sinuitidae : Cyrtodiscus

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	Gastropoda	Cuvier 1797
order	Bellerophontida	Ulrich and Scofield 1897
suborder	Bellerophontina	Ulrich and Scofield 1897
superfamily	Bellerophontoidea
family	Sinuitidae	Dall 1913
genus	Cyrtodiscus	Perner 1903

Opinions (PBDB)

Name	Rank	Opinion	Evidence	Author
Cyrtodiscus	subgenus	belongs to Oxydiscus	stated without evidence	Perner, 1903
Cyrtodiscus	genus	belongs to Cyrtolitidae	stated with evidence	Knight et al., 1960
Cyrtodiscus	genus	belongs to Temnodiscinae	stated with evidence	Horný, 1963
Cyrtodiscus	genus	belongs to Cyrtolitidae	stated with evidence	Runnegar and Jell, 1976
Cyrtodiscus	genus	belongs to Cyrtolitidae	stated without evidence	Yü, 1986
Cyrtodiscus	genus	belongs to Mollusca	second hand	Sepkoski, 2002

Status (PBDB)

extinct

Taxon Size (PBDB)

First Recorded Appearance

485 - 479 Ma
Paleozoic

Last Recorded Appearance

445 - 443 Ma
Paleozoic

Motility

actively mobile (based on Sinuitidae)

Vision

limited (based on Gastropoda)

Diet

detritivore (based on Sinuitidae)

Taphonomy

aragonite, low Mg calcite (based on Bellerophontida)

Primary Reference (PBDB)

J. Perner. 1903. Gastéropodes, Tome 1: Patellidae et Bellerophontidae

Fossil Distribution

Subtaxa

Name	Status	Fossil Occurrences	Oldest	Youngest
Cyrtolites evolvens ✝ species	accepted (GBIF) listed (PBDB)	12	461 Ma Middle Ordovician	445 Ma Late/Upper Ordovician
Oxydiscus nitidus ✝ species	accepted (GBIF) listed (PBDB)	4	466 Ma Middle Ordovician	466 Ma Middle Ordovician
Oxydiscus procer ✝ species	accepted (GBIF) listed (PBDB)	2	461 Ma Middle Ordovician	461 Ma Middle Ordovician
Cyrtodiscus simaki ✝ species	accepted (GBIF) listed (PBDB)	2	458 Ma Late/Upper Ordovician	458 Ma Late/Upper Ordovician

Synonymy List

Year	Name and Author
1903	Oxydiscus (Cyrtodiscus) Perner
1960	Cyrtodiscus Knight et al. p. 175
1962	Gamadiscus Horný p. 473
1963	Cyrtodiscus Horný
1963	Gamadiscus Horný
1976	Cyrtodiscus Runnegar and Jell p. 118

Year	Name and Author
1976	Gamadiscus Runnegar and Jell p. 121
1986	Cyrtodiscus Yü p. 15
1997	Cyrtodiscus Horný
2002	Gammadiscus Sepkoski
2002	Cyrtodiscus Sepkoski, Jr.
2002	Gammadiscus Sepkoski, Jr.

References

Perner J. (1903) , Gastéropodes, Tome 1: Patellidae et Bellerophontidae, 1-164

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

Horný R. J. (1962) New genera of Bohemian lower Paleozoic Bellerophontina, Vestník Ústredniho Ústavu Geologického 37 5, 473-476

Horný R. J. (1963) Lower Paleozoic Bellerophontina (Gastropoda) of Bohemia, Sborník Geologickych Ved 2, 57-164

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

Yü W. (1986) Lower Cambrian univalved molluscs from Kuruktag, Xinjiang, Acta Palaeontologica Sinica 25 1, 10-16

Horný R. J. (1997) New, rare, and better recognized Ordovician Tergomya and Gastropoda, Bulletin of the Czech Geological Survey 72 3, 223-237

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

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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