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Calycoceras

Cephalopoda - Ammonitida - Acanthoceratidae

Discussion

ICZN 1959: Opinion 557 (Case 1161)

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Taxonomy
Calycoceras was named by Hyatt (1900) [Sepkoski's age data: K Ceno-l K Ceno-u]. Its type is Ammonites navicularis.

It was assigned to Mantelliceratinae by Cooper (1978); to Acanthoceratidae by Matsumoto (1959), Cobban (1972), Zaborski (1985), Matsumoto and Skwarko (1991) and Matsumoto and Skwarko (1993); to Ammonoidea by Sepkoski (2002); and to Acanthoceratinae by Kennedy and Simmons (1991), Kennedy (1994), Wright et al. (1996), Kennedy et al. (1996), Kennedy et al. (1996), Barroso-Barcenilla (2004), Kennedy and Jolkicev (2004), Ahmad et al. (2013), Kennedy (2013), Sharifi et al. (2016), Gale et al. (2018) and Guendouz et al. (2022).

Synonyms
Synonymy list
YearName and author
1900Calycoceras Hyatt p. 589
1926Metacalycoceras Spath
1937Calycoceras (Metacalycoceras) Collignon
1959Calycoceras Matsumoto p. 72
1963Metacalycoceras Kellum and Robinson p. 238
1972Calycoceras Cobban p. 13
1978Calycoceras Cooper p. 83
1985Calycoceras Zaborski p. 32
1991Calycoceras Kennedy and Simmons p. 136
1991Calycoceras Matsumoto and Skwarko p. 252
1993Calycoceras Matsumoto and Skwarko p. 423
1994Calycoceras Kennedy p. 227
1996Calycoceras Kennedy et al. p. 313
1996Calycoceras Kennedy et al. p. 3
1996Calycoceras Wright et al. pp. 162 - 164
2002Calycoceras Sepkoski
2004Calycoceras Barroso-Barcenilla p. 89
2004Calycoceras Kennedy and Jolkicev p. 375
2013Calycoceras Ahmad et al. p. 25
2013Calycoceras Kennedy p. 646
2016Calycoceras Sharifi et al. p. 604
2018Calycoceras Gale et al. p. 116
2022Calycoceras Guendouz et al. p. 2163

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classCephalopodaCuvier 1797
RankNameAuthor
subclassAmmonoidea()
orderAmmonitida
suborderAmmonitinaHyatt 1889
superfamilyAcanthoceratoidea(de Grossouvre 1894)
familyAcanthoceratidaeGrossouvre 1894
subfamilyAcanthoceratinaede Groussouvre 1894
genusCalycoceras

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. †Calycoceras Hyatt 1900
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Subg. †Calycoceras (Calycoceras) Hyatt 1900
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†Calycoceras (Calycoceras) boreale Kennedy et al. 1996
†Calycoceras (Calycoceras) inflatum Cobban et al. 1989
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Invalid names: Acanthoceras borgesi Douville 1931 [synonym], Calycoceras (Metacalycoceras) auspicium Anderson 1958 [synonym], Calycoceras (Metacalycoceras) stoliczkai Collignon 1937 [synonym], Calycoceras obrieni Young 1957 [synonym], Mantelliceras oregonense Anderson 1958 [synonym], Metacalycoceras grossouvrei Spath 1926 [synonym]
Subg. †Calycoceras (Conlinoceras) Cobban and Scott 1972
Subg. †Calycoceras (Gentoniceras) Thomel 1972
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Invalid names: Eucalycoceras subgentoni Spath 1926 [synonym]
Subg. †Calycoceras (Hourcqiceras) Collignon 1939
Subg. †Calycoceras (Newboldiceras) Thomel 1972
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Invalid names: Calycoceras (Newboldiceras) newboldi Kossmat 1897 [synonym]
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Invalid names: Lotzeites crassum Thomel 1965 [synonym]
†Calycoceras (Newboldiceras) orientale Matsumoto et al. 1957
Invalid names: Acanthoceras (Pseudacanthoceras) Thomel 1972 [synonym], Newboldiceras (Mourreiceras) Thomel 1972 [synonym], Newboldiceras (Newboldiceras) Thomel 1972 [objective synonym]
Subg. †Calycoceras (Proeucalycoceras) Thomel 1969
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Invalid names: Acanthoceras rotomagense judaica Taubenhaus 1920 [synonym], Pseudocalycoceras (Haugiceras) robustum Thomel 1972 [synonym]
†Calycoceras (Proeucalycoceras) picteti Wright and Kennedy 1990
†Calycoceras bathyomphalum Kosmatt 1895
†Calycoceras boulei Collgnon 1937
†Calycoceras choffati Kossmat 1897
†Calycoceras lafouxiense Thomel 1972
†Calycoceras robustum Thomel 1972
†Calycoceras spinosum Wright and Wright 1951
Invalid names: Metacalycoceras Spath 1926 [synonym]
Diagnosis
ReferenceDiagnosis
C. W. Wright et al. 1996Rather evolute, with whorl section depressed and subcircular, oval, polygonal, or subquadrate; ribs strong, generally straight, continuous over rounded or flat but not concave venter; on early whorls at least umbilical, ventrolateral, siphonal, and, in most specimens, midlateral tubercles; in multituberculate forms umbilical tubercle more prominent than midlateral; tubercles may disappear with age and may or may not be rejuvenated on last part of shell. Marked dimorphism in size apparently general. Contrary to the situation in Mantelliceras, a number of subgenera are here accepted because there are significant morphological and, to some extent, time gaps between species groups.