PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Eupachydiscus

Cephalopoda - Ammonitida - Pachydiscidae

Taxonomy

Eupachydiscus was named by Spath (1922) [Sepkoski's age data: K Coni K Camp-u]. Its type is Ammonites isculensis.

It was assigned to Ammonoidea by Sepkoski (2002); and to Pachydiscidae by Matsumoto (1959), Henderson (1970), Kennedy et al. (1973), Summesberger (1979), Thomel (1988), Cobban and Kennedy (1992), Kennedy et al. (1992), Kennedy (1995), Arkadiev et al. (2000), Kennedy et al. (2007).

Species

E. depressus, E. grossouvrei, E. haradai, E. isculensis (syn. Pseudomenuites katschthaleri), E. lamberti, E. macoveii, E. pseudogrossouvrei, E. sayni, E. suciensis, E. teshioensis

Species lacking formal opinion data

E. haradai, E. haradai, E. jamaicensis, E. paucituberculatus

Synonyms

Mesopachydiscus was named by Yabe and Shimizu (1926).

It was synonymized subjectively with Eupachydiscus by Kennedy (1995).

Synonymy list

Year	Name and author
1922	Eupachydiscus Spath
1926	Mesopachydiscus Yabe and Shimizu p. 172
1959	Eupachydiscus Matsumoto p. 30
1970	Eupachydiscus Henderson p. 60
1973	Eupachydiscus Kennedy et al. p. 101
1979	Eupachydiscus Summesberger p. 136
1988	Eupachydiscus Thomel p. 38
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
2007	Eupachydiscus Kennedy et al. p. 517

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca

Rank	Name	Author
class	Cephalopoda	Cuvier 1797
subclass	Ammonoidea	()
order	Ammonitida	Haeckel 1866
suborder	Ammonitina	Hyatt 1889
superfamily	Desmoceratoidea	(Zittel 1895)
family	Pachydiscidae	Spath 1922
genus	Eupachydiscus	Spath 1922

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

G. †Eupachydiscus Spath 1922

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†Eupachydiscus depressus Henderson 1970

†Eupachydiscus grossouvrei Kossmat 1898

†Eupachydiscus haradai Jimbo 1894

†Eupachydiscus isculensis Redtenbacher 1873

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Invalid names: Pseudomenuites katschthaleri Immel et al. 1982 [synonym]

†Eupachydiscus lamberti Collignon 1938

†Eupachydiscus macoveii Szász 1981

†Eupachydiscus pseudogrossouvrei Collignon 1955

†Eupachydiscus sayni de Grossouvre 1894

†Eupachydiscus suciensis Meek 1861

†Eupachydiscus teshioensis Jimbo 1874

Invalid names: Mesopachydiscus Yabe and Shimizu 1926 [synonym]

Diagnosis

No diagnoses are available

Measurements

part	N	mean	minimum	maximum	median	s.d.
shell height	5	33.2	15.1	49.5	38.6	13.1
shell diameter	5	65.7	29.4	106.5	78.5	29.0
shell inflation	5	14.3	5.20	24.3	16.4	8.09

Composition:

aragoniteo

Environment:

marinec

Locomotion:

fast-movingo

Life habit:

nektonico

Diet:

carnivoreo

Vision:

well-developedc

Created:

2005-01-28 02:27:03

Modified:

2009-10-08 14:14:55

Source: o = order, c = class

References: Kiessling 2004, Kiessling 2003

Age range: base of the Middle Coniacian to the top of the Maastrichtian or 89.80000 to 66.00000 Ma

Collections (58 total)

Time interval	Ma	Country or state	Original ID and collection number
Coniacian	89.8 - 85.7	Spain	E. sp. (66964)
Coniacian	89.8 - 85.7	USA (California)	E. sp. (44237)
Middle Coniacian	89.8 - 85.7	France	Nowakites macoveii (69876)
Coniacian - Santonian	89.8 - 83.6	USA (California)	E. teshioensis (224925 224935)
Coniacian - Santonian	89.8 - 83.6	Japan (Hokkaido)	E. sp. (193939)
Late/Upper Coniacian - Early/Lower Santonian	89.8 - 83.6	USA (California)	E. teshioensis (224934 224940)
Late/Upper Coniacian - Santonian	89.8 - 83.6	Spain	E. isculensis (66968) E. sp., E. isculensis (66969)
Early/Lower Santonian	85.7 - 83.6	Japan	E. sp., E. haradai (219958)
Early/Lower Santonian	85.7 - 83.6	Austria	E. isculensis (173328)
Early/Lower Santonian - Late/Upper Santonian	85.7 - 83.6	France	E. isculensis (69872)
Late/Upper Santonian	85.7 - 83.6	Ukraine	E. sayni (183313)
Late/Upper Santonian	85.7 - 83.6	Jamaica	E. jamaicensis (99824)
Late/Upper Santonian	85.7 - 83.6	Austria	E. isculensis (177758)
Late/Upper Santonian	85.7 - 83.6	Japan	E. haradai (87015) E. sp. (115285 115295 115298)
Late/Upper Santonian	85.7 - 83.6	France	E. isculensis (179119 179587)
Middle Santonian	85.7 - 83.6	Spain (Catalunia)	E. isculensis (162693)
Middle Santonian	85.7 - 83.6	France	E. isculensis (179582 179605 179606 179607 179665)
Santonian	85.7 - 83.6	USA (California)	E. sp. (44238)
Santonian	85.7 - 83.6	France	E. sayni (69885)
Santonian	85.7 - 83.6	Antarctica	E. macoveii (83336)
Late/Upper Santonian - Early/Lower Campanian	85.7 - 72.2	Russian Federation	E. haradai (237006 237019 237020)
Late/Upper Santonian - Early/Lower Campanian	85.7 - 72.2	Japan (Hokkaido)	E. haradai (97297)
Santonian - Campanian	85.7 - 72.2	Japan (Teshio)	Pachydiscus teshioensis (234037)
Campanian	83.6 - 72.2	Antarctica	E. paucituberculatus (83352)
Campanian	83.6 - 72.2	USA (California)	E. n. sp. aff. lamberti (86861)
Campanian	83.6 - 72.2	South Africa	E. sp. (82729)
Early/Lower Campanian	83.6 - 72.2	Antarctica	E. paucituberculatus (83378 83379 83380) E. sp. (83354)
Early/Lower Campanian	83.6 - 72.2	Japan (Hokkaido)	E. haradai (94679)
Early/Lower Campanian	83.6 - 72.2	Canada (British Columbia)	E. sp. (202482)
Early/Lower Campanian	83.6 - 72.2	France	E. isculensis (165842 165843)
Early/Lower Campanian	83.6 - 72.2	Japan	E. haradai (82337 87034 174599)
Late/Upper Campanian	83.6 - 72.2	France	E. isculensis (82291)
Late/Upper Campanian	83.6 - 72.2	Antarctica	E. sp. (83387)
Late/Upper Campanian	83.6 - 72.2	Angola	E. pseudogrossouvrei (88883)
Middle Campanian	83.6 - 72.2	USA (Texas)	E. grossouvrei (73635)
Haumurian	83.6 - 66.0	New Zealand (Hawke's Bay)	E. depressus (233886)
Maastrichtian	72.2 - 66.0	Russian Federation (Sakhalin)	E. haradai (64610)
Maastrichtian	72.2 - 66.0	Australia (Western Australia)	Pachydiscus grossouvrei (82388 82389)