PBDB Taxon

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Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Euomphaloceras

Cephalopoda - Ammonitida - Acanthoceratidae

Taxonomy

Euomphaloceras was named by Spath (1923) [Sepkoski's age data: K Ceno-m K Ceno-u]. Its type is Ammonites euomphalus. It is the type genus of Euomphaloceratinae.

It was assigned to Acanthoceratidae by Zaborski (1985); to Ammonoidea by Sepkoski (2002); and to Euomphaloceratinae by Cooper (1978), Wright and Kennedy (1981), Wright (1983), Wright et al. (1996) and Gale et al. (2005).

Species

E. (Euomphaloceras), E. costatum, E. euomphalum, E. inerme (syn. Acanthoceras evolutum), E. merewetheri, E. septemseriatum (syn. Prionotropis echinatus, Acanthoceras kanabense, Lyelliceras stanislausense)

Synonyms

Kanabiceras was named by Reeside and Weymouth (1931). Its type is Scaphites septemseriatus.

It was reranked as Euomphaloceras (Kanabiceras) by Cooper (1978) and Renz (1982); it was synonymized subjectively with Euomphaloceras by Wright and Kennedy (1981) and Barroso-Barcenilla (2004).

It was assigned to Pachydiscidae by Matsumoto (1959); to Euomphaloceras by Cooper (1978) and Renz (1982); and to Euomphaloceratinae by Wright (1983).

Synonymy list

Year	Name and author
1923	Euomphaloceras Spath
1931	Kanabiceras Reeside and Weymouth pp. 11-12
1959	Kanabiceras Matsumoto pp. 98 - 99
1978	Euomphaloceras Cooper p. 106
1978	Euomphaloceras (Kanabiceras) Cooper p. 106
1981	Euomphaloceras Wright and Kennedy
1982	Euomphaloceras (Kanabiceras) Renz p. 97
1983	Euomphaloceras Wright
1983	Kanabiceras Wright
1985	Euomphaloceras Zaborski p. 39
1996	Euomphaloceras Wright et al. p. 167
2002	Euomphaloceras Sepkoski
2005	Euomphaloceras Gale et al. p. 177

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca
class	Cephalopoda	Cuvier 1797

Rank	Name	Author
subclass	Ammonoidea	()
order	Ammonitida
suborder	Ammonitina	Hyatt 1889
superfamily	Acanthoceratoidea	(de Grossouvre 1894)
family	Acanthoceratidae	Grossouvre 1894
subfamily	Euomphaloceratinae
genus	Euomphaloceras

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. †Euomphaloceras Spath 1923

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Subg. †Euomphaloceras (Euomphaloceras) Spath 1923

†Euomphaloceras costatum Cobban et al. 1989

†Euomphaloceras euomphalum Sharpe 1855

†Euomphaloceras inerme Pervinquière 1907

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Invalid names: Acanthoceras evolutum Spath 1926 [synonym]

†Euomphaloceras merewetheri Cobban et al. 1989

†Euomphaloceras septemseriatum Cragin 1893

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Invalid names: Acanthoceras kanabense Stanton 1894 [synonym], Lyelliceras stanislausense Anderson 1958 [synonym], Prionotropis echinatus Douville 1931 [synonym]

Invalid names: Kanabiceras Reeside and Weymouth 1931 [synonym]

Diagnosis

Reference	Diagnosis
C. W. Wright et al. 1996	Very evolute; whorl section square to depressed-octagonal; prominent umbilical and ventrolateral tubercles on some or all main ribs; ribs branching at ventrolateral tubercles= and carrying 3 rows of small, bullate to clavate tubercles on broad venter; shallow ventral constrictions on early whorls, variously persistent; ribs may be transverse or in chevrons on venter. Suture having narrow external saddle with oblique dorsal slope and wide, splayed first lateral lobe.

Measurements

part	N	mean	minimum	maximum	median	s.d.
shell height	8	12.3	7.00	19.0	13.0	4.47
shell diameter	8	32.6	22.0	50.0	34.0	10.8
shell inflation	8	11.4	7.00	18.0	11.5	3.89

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 Early/Lower Cenomanian to the top of the Early/Lower Turonian or 99.60000 to 89.30000 Ma

Collections (48 total)

Time interval	Ma	Country or state	Original ID and collection number
Cenomanian	100.5 - 93.9	USA (Arizona)	E. sp. (3077 3079 3080 3082 3083)
Cenomanian	100.5 - 93.9	USA (Colorado)	E. sp. (2741)
Cenomanian	100.5 - 93.9	USA (California)	E. septemseriatum (185728) Lyelliceras stanislausense (44197)
Early/Lower Cenomanian	99.6 - 93.5	France (Normandie)	E. inerme (230776)
Late/Upper Cenomanian	99.6 - 93.5	USA (Colorado)	Kanabiceras septemseriatum (78164)
Late/Upper Cenomanian	99.6 - 93.5	Spain	E. euomphalum (186987 186989)
Late/Upper Cenomanian	99.6 - 93.5	Brazil	E. costatum (141016) Euompholoceras septemseriatum (140840)
Late/Upper Cenomanian	99.6 - 93.5	USA (California)	Acanthoceras evolutum (224963) Lyelliceras stanislausense (185727)
Late/Upper Cenomanian	99.6 - 93.5	Angola	E. septemseriatum (70955 175545)
Late/Upper Cenomanian	99.6 - 93.5	USA (New Mexico)	Eumophaloceras septemseriatum (167817) E. euomphalum (177087) E. septemseriatum (175425 230782) Kanabiceras septemseriatum (230784)
Late/Upper Cenomanian	99.6 - 93.5	USA (Wyoming)	E. merewetheri (175424)
Late/Upper Cenomanian	99.6 - 93.5	Germany (Sachsen)	E. septemseriatum (172053 172055 172057)
Late/Upper Cenomanian	99.6 - 93.5	USA (Arizona)	E. irregulare (55890) E. septemseriatum (53486 54145 54165) E. sp. (3084)
Late/Upper Cenomanian	99.6 - 93.5	USA (Utah)	E. sp. (3322 3325 3327) Kanabiceras septemseriatum (175427 175428)
Late/Upper Cenomanian	99.6 - 93.5	USA (Montana)	Kanabiceras septemseriatum (175421)
Late/Upper Cenomanian	99.6 - 93.5	USA (Texas)	E. septemseriatum (175717 177097) Neocardioceras septemseriatum (167821)
Middle Cenomanian	99.6 - 93.5	Nigeria	E. inerme (69627)
Middle Cenomanian	99.6 - 93.5	Brazil	E. meridionale (140838)
Late/Upper Cenomanian - Early/Lower Turonian	99.6 - 89.3	USA (New Mexico)	Kanabiceras sp. (179266)
Turonian - Coniacian	93.9 - 86.3	USA (Alaska)	E. sp. (88934)
Early/Lower Turonian	93.5 - 89.3	USA (Colorado)	Kanabiceras sp. (230901)
Early/Lower Turonian	93.5 - 89.3	Venezuela (Trujillo)	E. septemseriatum (88036)
Early/Lower Turonian	93.5 - 89.3	USA (California)	E. sp. (185388)