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Eupachydiscus ✝

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Description

Eupachydisus is a large, coarse-ribbed Pachydiscid ammonite genus from the Upper Cretaceous, found in Coniacian to Campanian age strata in Europe, Madagascar, Japan, and British Columbia.

From Wikipedia article at https://en.wikipedia.org/wiki/Eupachydiscus, which is released under the Creative Commons Attribution-Share-Alike License 3.0.

Source Data

Source	ID	Link
Global Biodiversity Information Facility ID (GBIF)	4626568	https://www.gbif.org/species/4626568
PaleoBioDB ID (PBDB)	14876	https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=14876

Rank

genus

Taxonomy (GBIF)

Life : Animalia : Mollusca : Cephalopoda : Ammonoidea : Pachydiscidae : Eupachydiscus

Taxonomy (PBDB)

Life : Animalia : Mollusca : Cephalopoda : Ammonitida : Pachydiscidae : Eupachydiscus

Taxonomic Status (GBIF)

accepted

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	Cephalopoda	Cuvier 1797
subclass	Ammonoidea
order	Ammonitida	Hyatt 1889
suborder	Ammonitina	Hyatt 1889
superfamily	Desmoceratoidea
family	Pachydiscidae	Spath 1922
genus	Eupachydiscus	Spath 1922

Scientific Name

Eupachydiscus Spath, 1922

Name Published In

Trans. Roy. Soc. S. Africa, 10

Opinions (PBDB)

Name	Rank	Opinion	Evidence	Author
Eupachydiscus	genus	belongs to Pachydiscidae	stated with evidence	Henderson, 1970
Eupachydiscus	genus	belongs to Pachydiscidae	stated without evidence	Thomel, 1988
Eupachydiscus	genus	belongs to Pachydiscidae	stated with evidence	Cobban and Kennedy, 1992
Eupachydiscus	genus	belongs to Ammonoidea	second hand	Sepkoski, 2002
Eupachydiscus	genus	belongs to Pachydiscidae	stated with evidence	Kennedy et al., 2007

Status (PBDB)

extinct

Taxon Size (PBDB)

First Recorded Appearance

89.8 - 86.3 Ma
Late/Upper Cretaceous

Last Recorded Appearance

72.1 - 66.0 Ma
Late/Upper Cretaceous

Motility

fast-moving (based on Ammonoidea)

Vision

well-developed (based on Cephalopoda)

Diet

carnivore (based on Ammonoidea)

Taphonomy

aragonite (based on Ammonoidea)

Primary Reference (PBDB)

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

Wikipedia

https://en.wikipedia.org/wiki/Eupachydiscus

Fossil Distribution

Subtaxa

Name	Status	Common Name(s)	Fossil Occurrences	Oldest	Youngest
Eupachydiscus arbucklensis ✝ species	accepted (GBIF) listed (PBDB)		2	89.8 Ma Late/Upper Cretaceous	89.8 Ma Late/Upper Cretaceous
Eupachydiscus depressus ✝ species	accepted (GBIF) listed (PBDB)
Eupachydiscus gordoni species	accepted (GBIF)	No associated record in PBDB
Eupachydiscus grossouvrei ✝ species	accepted (GBIF) listed (PBDB)		3	83.5 Ma Late/Upper Cretaceous	72.1 Ma Late/Upper Cretaceous
Eupachydiscus isculensis ✝ species	accepted (GBIF) listed (PBDB)		16	89.3 Ma Late/Upper Cretaceous	83.5 Ma Late/Upper Cretaceous
Eupachydiscus levyi species	accepted (GBIF)	No associated record in PBDB
Eupachydiscus macoveii ✝ species	accepted (GBIF) listed (PBDB)		2	89.3 Ma Late/Upper Cretaceous	86.3 Ma Late/Upper Cretaceous
Eupachydiscus pseudogrossouvrei ✝ species	accepted (GBIF) listed (PBDB)		1	83.5 Ma Late/Upper Cretaceous	83.5 Ma Late/Upper Cretaceous
Eupachydiscus sayni ✝ species	accepted (GBIF) listed (PBDB)		2	86.3 Ma Late/Upper Cretaceous	85.8 Ma Late/Upper Cretaceous
Eupachydiscus willgreeni ✝ species	accepted (GBIF) listed (PBDB)		1	89.8 Ma Late/Upper Cretaceous	89.8 Ma Late/Upper Cretaceous

Synonymy List

Year	Name and Author
1922	Eupachydiscus Spath
1926	Mesopachydiscus Yabe and Shimizu p. 172
1970	Eupachydiscus Henderson p. 60
1973	Eupachydiscus Kennedy et al. p. 101
1979	Eupachydiscus Summesberger p. 136
1988	Eupachydiscus Thomel p. 38

Year	Name and Author
1992	Eupachydiscus Cobban and Kennedy p. 70
1992	Eupachydiscus Kennedy et al. p. 270
1995	Eupachydiscus Kennedy p. 404
2000	Eupachydiscus Arkadiev et al. p. 110
2002	Eupachydiscus Sepkoski, Jr.
2007	Eupachydiscus Kennedy et al. p. 517

References

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

Henderson R. A. (1970) Ammonoidea from the Mata Series (Santonian-Maastrichtian) of New Zealand, Special Papers in Palaeontology 6, 1-82

Kennedy W. J., Kauffman E. G., et al (1973) Upper Cretaceous Invertebrate Faunas from Durban, South Africa, Geological Society of South Africa Transactions 76 2, 95-111

Summesberger H. (1979) Eine obersantone Ammonitenfauna aus dem Becken von Gosau (Oberösterreich), Annalen des Naturhistorischen Museums in Wien 82, 109-176

Thomel G. (1988) Les ammonites néocrétacées des chaînes subalpines méridionales, Mémoires de la Société Géologique de France 153, 1-79

Cobban W. A., Kennedy W. J. (1992) Campanian Trachyscaphites spiniger ammonite fauna in north-east Texas, Palaeontology 35 1, 63-93

Kennedy W. J., Hansotte M., et al (1992) Ammonites and nannofossils from the Campanian of Nalzen (Ariége, France), Geobios 25 2, 263-278

Kennedy W. J. (1995) Systematic palaeontology, in Ammonite faunas, biostratigraphy, and sequence stratigraphy of the Coniacian-Santonian of the Corbières (NE Pyrénées), Bulletin des Centres de Recherches Elf Exploration-Production Elf-Aquitaine 19, 377-499

Arkadiev V. V., Atabekian A. A., et al (2000) Stratigraphy and ammonites of Cretaceous deposits of south-west Crimea, Palaeontographica Abteilung A 255, 85-128

Kennedy W. J., Crame J. A., et al (2007) Coniacian ammonites from James Ross Island, Antarctica, Cretaceous Research 28 509, 531

GBIF/Paleo Database - via The Interim Register of Marine and Nonmarine Genera

Nomenclator Zoologicus. A list of the names of genera and subgenera in zoology from the tenth edition of Linnaeus, 1758 to the end of 2004. Digitised by uBio from vols. 1-9 of Neave (ed.), 1939-1996 plus supplementary digital-only volume. http://ubio.org/NomenclatorZoologicus (as at 2006). - via The Interim Register of Marine and Nonmarine Genera

Sepkoski, J. J., Jr. (2002). A compendium of fossil marine animal genera. Bulletins of American Paleontology. 363, 1-560. - via The Interim Register of Marine and Nonmarine Genera

Trans. Roy. Soc. S. Africa, 10 - via The Interim Register of Marine and Nonmarine Genera

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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