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Acanthoceras
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).
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
A. (Alternacanthoceras), A. amphibolum (syn. A. alvaradoense, A. hazzardi), A. asiatica, A. athabascense, A. basseae (syn. A. vergonsense), A. bellense (syn. A. stephensoni), A. chasca, A. compitalis, A. compressum, A. flexuosum (syn. A. gortanii), A. granerosense, A. joserita, A. jukesbrownei, A. muldoonense, A. pollocense, A. rhotomagense (syn. Ammonites cenomanensis, A. (Pseudacanthoceras) praecursor), A. robustum, A. sangalense, A. sarthacense, A. sherborni, A. vectense, A. whitei (syn. A. turneri)
Species lacking formal opinion data
Synonyms
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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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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
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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
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Invalid names: Acanthoceras vergonsense Thomel 1972 [synonym]
†Acanthoceras chasca Benavides-Caceres 1956
†Acanthoceras compitalis Stoyanow 1949
†Acanthoceras compressum Anderson 1902
†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
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Invalid names: Acanthoceras (Pseudacanthoceras) praecursor Thomel 1972 [synonym], Ammonites cenomanensis d'Orbigny 1850 [synonym]
†Acanthoceras rhotomagense sussexiense Mantell 1822
†Acanthoceras robustum Crick 1907
†Acanthoceras sangalense Benavides-Caceres 1956
†Acanthoceras sarthacense Wright and Kennedy 1990
†Acanthoceras sherborni Spath 1926
†Acanthoceras vectense Spath 1925
†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 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: base of the Early/Lower Albian to the top of the Turonian or 112.03000 to 89.80000 Ma
Collections (121 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Albian | Mexico (Coahuila de Zaragoza) | A. sp. (88253) | |
| Cenomanian | United Kingdom (England) | A. sp., A. jukesbrownei (81062) | |
| Cenomanian | USA (New Mexico) | A. amphibolum (10180) | |
| Cenomanian | France (Normandie) | A. rhotomagense (230797) A. spp., A. jukesbrownei, A. whitei (230777) | |
| Cenomanian | France (Haute-Normandie) | A. basseae (230857) | |
| Cenomanian | France | A. jukesbrownei (4065) A. roemeri (230800) | |
| Cenomanian | USA (California) | A. rhotomagense (44210) A. sherborni (86820) A. sp. (83773) | |
| Cenomanian | United Kingdom | Ammonites sussexiensis (153949) | |
| Cenomanian | USA (Texas) | A. eulessanum (6548) A. eulessanum, A. tarrantense nitidum (6493) A. hazzardi (6485 6492 6568 6569) Euomphaloceras alvaradoense (2120 2122 2123 2125 231936) | |
| Early/Lower Cenomanian | France | A. pseudorenevieri (59810) | |
| Early/Lower Cenomanian | United Kingdom (England) | A. sp., A. rhotomagense (82814) Ammonites rothomagensis (49496) | |
| Early/Lower Cenomanian | France (Normandie) | A. subflexuosum, A. davatum, A. confusum, A. rhotomagense, A. sussexiense, A. basseae (230776) | |
| Early/Lower Cenomanian - Middle Cenomanian | Denmark | A. rhotomagense (69975) | |
| Early/Lower Cenomanian - Middle Cenomanian | France | A. sp. (56849) | |
| Late/Upper Cenomanian | Libya | A. sp. (208626) | |
| Late/Upper Cenomanian | Australia (Northern Territory) | A. sp. (37711 37712 37713) | |
| Late/Upper Cenomanian | United Kingdom (England) | A. jukesbrownei (82914) A. sp. (82797 82809 82857 82913 82919) A. sp., A. rhotomagense (82899) | |
| Late/Upper Cenomanian | USA (New Mexico) | A. amphibolum (176967) A. sp. (176964) | |
| Late/Upper Cenomanian | Germany | A. sp. (12586 12594) | |
| Late/Upper Cenomanian | France | A. jukesbrownei (82845) A. sussexiense (59793) | |
| Late/Upper Cenomanian | Peru (Cajamarca) | A. chasca, A. pollocense, A. sangalense (88159) A. sp. (88162) | |
| Middle Cenomanian | USA (New Mexico) | A. amphibolum (178790 178835 178838) A. bellense (178837 178840 178841) A. muldoonense (178834 178839) | |
| Middle Cenomanian | USA (South Dakota) | Cunningtoniceras fallense (232640) | |
| Middle Cenomanian | Germany (Westphalia) | A. rhotomagense (4067) | |
| Middle Cenomanian | Egypt | A. amphibolum (151581 151603) | |
| Middle Cenomanian | Tunisia (Sidi Bou Zid) | A. rhotomagense (217162) | |
| Middle Cenomanian | India (Tamil Nadu) | A. rhotomagense (207139) | |
| Middle Cenomanian | United Kingdom | A. jukesbrownei (193273) A. rhotomagense (193272) | |
| Middle Cenomanian | USA (Wyoming) | A. amphibolum, A. alvaradoense, Cunningtoniceras amphibolum (231777) A. amphibolum, Cunningtoniceras fallense (231776) A. muldoonense (230894) Cunningtoniceras amphibolum (177081) | |
| Middle Cenomanian | Nigeria | A. rhotomagense (69627) A. robustum (69633) A. sp., A. amphibolum (69629) | |
| Middle Cenomanian | Spain | A. rhotomagense (186985) | |
| Middle Cenomanian | Mozambique | A. rhotomagense, A. flexuosum (174799) A. sp., A. rhotomagense, A. flexuosum (174830) | |
| Middle Cenomanian | 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 | France | A. rhotomagense (82843) | |
| Middle Cenomanian | Papua New Guinea | A. rhotomagense (174850 177070) A. sp. (177071) | |
| Middle Cenomanian | France (Normandy) | A. jukesbrownei, A. rhotomagense (4025) | |
| Middle Cenomanian | USA (Texas) | A. bellense (198573) A. stephensoni (234116) | |
| Middle Cenomanian | Bulgaria | A. jukesbrownei (174928 174936) | |
| Middle Cenomanian | United Kingdom (England) | A. rhotomagense (78588 78591 78592 78593 210338) | |
| Middle Cenomanian | Iran | A. rhotomagense (174335 174336) | |
| Middle Cenomanian | Madagascar | A. sp. (174331) | |
| Middle Cenomanian | Australia (Northern Territory) | A. mirialampiensis, A. quadratum (13944 13946) | |
| Middle Cenomanian | France (Pays de la Loire region) | A. sarthacense (233958) | |
| Middle Cenomanian - Late/Upper Cenomanian | Brazil | A. jukesbrownei (140839) | |
| Turonian | USA (Minnesota) | A. sp. (1987) | |
| Turonian | USA (California) | A. sp. (44198) | |
| Early/Lower Turonian | Mexico (Coahuila de Zaragoza) | A. sp. (88255) | |
| Early/Lower Turonian | Cameroon | A. sp. (209694) |