PBDB Taxon

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Acanthoceras

Cephalopoda - Ammonitida - Acanthoceratidae

Taxonomy

Acanthoceras was named by Neumayr (1875) [Sepkoski's age data: K Ceno-l K Ceno-u]. Its type is Ammonites rhotomagensis. It is the type genus of Acanthocerataceae, Acanthoceratidae.

It was assigned to Acanthoceratidae by Benavides-Caceres (1956), Matsumoto (1959), Zaborski (1985), Matsumoto and Skwarko (1991) and Matsumoto and Skwarko (1993); to Ammonoidea by Sepkoski (2002); to Acanthoplitinae by Robert and Bulot (2005); and to Acanthoceratinae by Förster (1975), Kennedy et al. (1988), Kennedy (1994), Wright et al. (1996), Kennedy et al. (1996), Barroso-Barcenilla (2004), Kennedy and Jolkicev (2004), Mosavinia and Wilmsen (2011), Kennedy (2013) and Gale et al. (2018).

Species lacking formal opinion data

A. quadratum, A. sarthacense

Synonyms

Metacanthoplites was named by Hyatt (1900). Its type is Ammonites rhotomagensis.

It was synonymized objectively with Acanthoceras by Wright (1952) and Barroso-Barcenilla (2004).

Synonymy list

Year	Name and author
1875	Acanthoceras Neumayr
1900	Metacanthoplites Hyatt p. 589
1956	Acanthoceras Benavides-Caceres p. 466
1959	Acanthoceras Matsumoto pp. 81 - 82
1975	Acanthoceras Förster p. 248
1985	Acanthoceras Zaborski p. 33
1988	Acanthoceras Kennedy et al. p. 38
1991	Acanthoceras Matsumoto and Skwarko p. 257
1993	Acanthoceras Matsumoto and Skwarko p. 421
1994	Acanthoceras Kennedy p. 225
1996	Acanthoceras Kennedy et al. p. 313
1996	Acanthoceras Wright et al. p. 156
2002	Acanthoceras Sepkoski
2004	Acanthoceras Barroso-Barcenilla p. 88
2004	Acanthoceras Kennedy and Jolkicev p. 373
2005	Acanthoceras Robert and Bulot p. 611
2011	Acanthoceras Mosavinia and Wilmsen p. 184
2013	Acanthoceras Kennedy p. 646
2018	Acanthoceras Gale et al. p. 114

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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	Acanthoceratinae	de Groussouvre 1894
genus	Acanthoceras

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. †Acanthoceras Neumayr 1875

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Subg. †Acanthoceras (Alternacanthoceras) Marcinowski 1979

†Acanthoceras amphibolum Morrow 1935

Invalid names: Acanthoceras alvaradoense Moreman 1942 [synonym], Acanthoceras hazzardi Stephenson 1952 [synonym]

†Acanthoceras asiatica Jimbo 1894

†Acanthoceras athabascense Warren and Stelck 1955

†Acanthoceras basseae Kennedy and Hancock 1970

Invalid names: Acanthoceras vergonsense Thomel 1972 [synonym]

†Acanthoceras bellense Adkins 1928

Invalid names: Acanthoceras stephensoni Adkins 1928 [synonym]

†Acanthoceras chasca Benavides-Caceres 1956

†Acanthoceras compitalis Stoyanow 1949

†Acanthoceras compressum Anderson 1902

†Acanthoceras flexuosum Crick 1907

Invalid names: Acanthoceras gortanii Venzo 1936 [synonym]

†Acanthoceras granerosense Cobban and Scott 1972

†Acanthoceras joserita Stoyanow 1949

†Acanthoceras jukesbrownei Spath 1926

†Acanthoceras muldoonense Cobban and Scott 1973

†Acanthoceras pollocense Benavides-Caceres 1956

†Acanthoceras rhotomagense Brongniart 1822

†Acanthoceras rhotomagense sussexiense Mantell 1822

Invalid names: Acanthoceras (Pseudacanthoceras) praecursor Thomel 1972 [synonym], Ammonites cenomanensis d'Orbigny 1850 [synonym]

†Acanthoceras robustum Crick 1907

†Acanthoceras sangalense Benavides-Caceres 1956

†Acanthoceras sherborni Spath 1926

†Acanthoceras vectense Spath 1925

†Acanthoceras whitei Matsumoto 1959

Invalid names: Acanthoceras turneri White 1889 [replaced]

†Cunningtoniceras amphibolum fallense Cobban 1987

Invalid names: Alternacanthoceras Marcinowski 1979 [synonym], Metacanthoplites Hyatt 1900 [synonym]

Diagnosis

Reference	Diagnosis
C. W. Wright et al. 1996	Early whorls with round to square whorl section and with umbilical, inner and outer (generally clavate) ventrolateral, and siphonal tubercles; distinct ribs, if present, branching or long and short. Later whorls with ribs, single and uniform or long and short, sometimes weakening; umbilical tubercles may enlarge and move up side, ventrolaterals may fuse to form large horn, while siphonals may disappear, leaving broad, flat venter.

Measurements

part	N	mean	minimum	maximum	median	s.d.
shell height	21	30.4	6.40	70.0	30.0	17.4
shell diameter	21	69.3	13.5	215.0	73.5	50.4
shell inflation	21	19.2	3.00	90.0	20.0	21.7

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 Albian to the top of the Turonian or 112.03000 to 89.80000 Ma

Collections (120 total)

Time interval	Ma	Country or state	Original ID and collection number
Early/Lower Albian	112.03 - 109.0	Mexico (Coahuila de Zaragoza)	A. sp. (88253)
Cenomanian	100.5 - 93.9	USA (Texas)	A. eulessanum (6548) A. eulessanum, A. tarrantense nitidum (6493) A. hazzardi (6485 6492 6568 6569) Euomphaloceras alvaradoense (2120 2122 2123 2125 231936)
Cenomanian	100.5 - 93.9	France (Normandie)	A. rhotomagense (230797) A. spp., A. jukesbrownei, A. whitei (230777)
Cenomanian	100.5 - 93.9	USA (New Mexico)	A. amphibolum (10180)
Cenomanian	100.5 - 93.9	United Kingdom (England)	A. sp., A. jukesbrownei (81062)
Cenomanian	100.5 - 93.9	France	A. jukesbrownei (4065) A. roemeri (230800)
Cenomanian	100.5 - 93.9	United Kingdom	Ammonites sussexiensis (153949)
Cenomanian	100.5 - 93.9	USA (California)	A. rhotomagense (44210) A. sherborni (86820) A. sp. (83773)
Cenomanian	100.5 - 93.9	France (Haute-Normandie)	A. basseae (230857)
Early/Lower Cenomanian	99.6 - 93.5	France (Normandie)	A. subflexuosum, A. davatum, A. confusum, A. bassae, A. rhotomagense, A. sussexiense (230776)
Early/Lower Cenomanian	99.6 - 93.5	France	A. pseudorenevieri (59810)
Early/Lower Cenomanian	99.6 - 93.5	United Kingdom (England)	A. sp., A. rhotomagense (82814) Ammonites rothomagensis (49496)
Early/Lower Cenomanian - Middle Cenomanian	99.6 - 93.5	France	A. sp. (56849)
Early/Lower Cenomanian - Middle Cenomanian	99.6 - 93.5	Denmark	A. rhotomagense (69975)
Late/Upper Cenomanian	99.6 - 93.5	Libya	A. sp. (208626)
Late/Upper Cenomanian	99.6 - 93.5	Germany	A. sp. (12586 12594)
Late/Upper Cenomanian	99.6 - 93.5	France	A. jukesbrownei (82845) A. sussexiense (59793)
Late/Upper Cenomanian	99.6 - 93.5	Peru (Cajamarca)	A. chasca, A. pollocense, A. sangalense (88159) A. sp. (88162)
Late/Upper Cenomanian	99.6 - 93.5	USA (New Mexico)	A. amphibolum (176967)
Late/Upper Cenomanian	99.6 - 93.5	United Kingdom (England)	A. jukesbrownei (82914) A. sp. (82797 82809 82857 82913 82919) A. sp., A. rhotomagense (82899)
Late/Upper Cenomanian	99.6 - 93.5	Australia (Northern Territory)	A. sp. (37711 37712 37713)
Middle Cenomanian	99.6 - 93.5	Australia (Northern Territory)	A. mirialampiensis, A. quadratum (13944 13946)
Middle Cenomanian	99.6 - 93.5	Tunisia (Sidi Bou Zid)	A. rhotomagense (217162)
Middle Cenomanian	99.6 - 93.5	France	A. rhotomagense (82843)
Middle Cenomanian	99.6 - 93.5	Mozambique	A. rhotomagense, A. flexuosum (174799) A. sp., A. rhotomagense, A. flexuosum (174830)
Middle Cenomanian	99.6 - 93.5	Papua New Guinea	A. rhotomagense (174850 177070) A. sp. (177071)
Middle Cenomanian	99.6 - 93.5	USA (South Dakota)	Cunningtoniceras fallense (232640)
Middle Cenomanian	99.6 - 93.5	USA (Wyoming)	A. amphibolum, A. alvaradoense, Cunningtoniceras amphibolum (231777) A. amphibolum, Cunningtoniceras fallense (231776) A. muldoonense (230894) Cunningtoniceras amphibolum (177081)
Middle Cenomanian	99.6 - 93.5	Egypt	A. amphibolum (151581 151603)
Middle Cenomanian	99.6 - 93.5	United Kingdom	A. jukesbrownei (193273) A. rhotomagense (193272)
Middle Cenomanian	99.6 - 93.5	Germany	A. jukesbrownei (12588 12589 12590) A. rhotomagense (12402 12403 12404 12405 12406 12407 12408 12409 12410 12460 12461 12462 12463 12464 12465 12485 12486 12576 12577)
Middle Cenomanian	99.6 - 93.5	Nigeria	A. rhotomagense (69627) A. robustum (69633) A. sp., A. amphibolum (69629)
Middle Cenomanian	99.6 - 93.5	Madagascar	A. sp. (174331)
Middle Cenomanian	99.6 - 93.5	India (Tamil Nadu)	A. rhotomagense (207139)
Middle Cenomanian	99.6 - 93.5	Iran	A. rhotomagense (174335 174336)
Middle Cenomanian	99.6 - 93.5	Germany (Westphalia)	A. rhotomagense (4067)
Middle Cenomanian	99.6 - 93.5	United Kingdom (England)	A. rhotomagense (78588 78591 78592 78593 210338)
Middle Cenomanian	99.6 - 93.5	Spain	A. rhotomagense (186985)
Middle Cenomanian	99.6 - 93.5	USA (New Mexico)	A. amphibolum (178790 178835 178838) A. bellense (178837 178840 178841) A. muldoonense (178834 178839)
Middle Cenomanian	99.6 - 93.5	France (Pays de la Loire region)	A. sarthacense (233958)
Middle Cenomanian	99.6 - 93.5	France (Normandy)	A. jukesbrownei, A. rhotomagense (4025)
Middle Cenomanian	99.6 - 93.5	USA (Texas)	A. bellense (198573) A. stephensoni (234116)
Middle Cenomanian	99.6 - 93.5	Bulgaria	A. jukesbrownei (174928 174936)
Middle Cenomanian - Late/Upper Cenomanian	99.6 - 93.5	Brazil	A. jukesbrownei (140839)
Turonian	93.9 - 89.8	USA (California)	A. sp. (44198)
Turonian	93.9 - 89.8	USA (Minnesota)	A. sp. (1987)
Early/Lower Turonian	93.5 - 89.3	Cameroon	A. sp. (209694)
Early/Lower Turonian	93.5 - 89.3	Mexico (Coahuila de Zaragoza)	A. sp. (88255)