PBDB Taxon

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

Libycoceras

Cephalopoda - Ammonitida - Sphenodiscidae

Taxonomy

Libycoceras was named by Hyatt (1900) [Sepkoski's age data: K Camp-u K Maes-l]. Its type is Sphenodiscus ismaelis.

It was assigned to Libycoceratidae by Zaborski (1982); to Ammonoidea by Sepkoski (2002); to Sphenodiscinae by Wright et al. (1996), Ahmad et al. (2015); and to Sphenodiscidae by Hyatt (1903), Kennedy (1995), Kennedy (1999), Jagt et al. (2019).

Species

L. acutodorsatus (syn. L. chargense), L. afikpoense, L. crossense, L. dandense, L. ismaelis

Synonymy list

Year	Name and author
1900	Libycoceras Hyatt p. 585
1903	Libycoceras Hyatt p. 57
1982	Libycoceras Zaborski p. 307
1995	Libycoceras Kennedy p. 247
1996	Libycoceras Wright et al. p. 205
1999	Libycoceras Kennedy p. 653
2002	Libycoceras Sepkoski
2015	Libycoceras Ahmad et al. p. 247
2019	Libycoceras Jagt et al. p. 591

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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	Acanthoceratoidea	(de Grossouvre 1894)
family	Sphenodiscidae
genus	Libycoceras

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. †Libycoceras Hyatt 1900

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†Libycoceras acutodorsatus Noetling 1897

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Invalid names: Libycoceras chargense Blanckenhorn 1900 [synonym]

†Libycoceras afikpoense Reyment 1955

†Libycoceras crossense Zaborski 1982

†Libycoceras dandense Howarth 1965

†Libycoceras ismaelis Zittel 1884

Diagnosis

No diagnoses are available

Measurements

part	N	mean	minimum	maximum	median	s.d.
shell height	7	60.9	33.0	121.3	74.0	32.9
shell diameter	7	106.0	59.0	215.0	125.5	55.4
shell inflation	7	4.47	2.00	8.50	5.00	2.24

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 2003, Kiessling 2004

Age range: base of the Campanian to the top of the Early/Lower Maastrichtian or 83.60000 to 66.00000 Ma

Collections (27 total)

Time interval	Ma	Country or state	Original ID and collection number
Late/Upper Campanian	83.6 - 72.2	Nigeria (Enugu)	L. afikpoense (82733)
Late/Upper Campanian	83.6 - 72.2	Saudi Arabia	L. sp. (184844)
Late/Upper Campanian	83.6 - 72.2	Nigeria	L. afikpoense (69626) L. crossense (69692)
Late/Upper Campanian	83.6 - 72.2	Angola	L. sp. (88885) Manambolites dandensis (88882)
Late/Upper Campanian	83.6 - 72.2	Oman	L. sp. (67455)
Late/Upper Campanian	83.6 - 72.2	Spain	L. ismaeli (67002)
Campanian - Paleocene	83.6 - 56.0	Mali	L. sp. (202356)
Early/Lower Maastrichtian	72.2 - 66.0	United Arab Emirates	L. sp. (175471)
Early/Lower Maastrichtian	72.2 - 66.0	Nigeria	L. dandense (70970)
Early/Lower Maastrichtian	72.2 - 66.0	Jordan	L. acutodorsatus (178487 178489 178491)
Late/Upper Maastrichtian	72.2 - 66.0	Jordan	L. acutodorsatus (170239)
Late/Upper Maastrichtian	72.2 - 66.0	Egypt	L. ismaelis (199919 199925)
Maastrichtian	72.2 - 66.0	Niger (Tahoua)	L. crossense (47112 47113 47115) L. sp. (178660)
Maastrichtian	72.2 - 66.0	Niger	L. sp. (47111)
Maastrichtian	72.2 - 66.0	Mali	L. crossense (114954) L. sp. (202360)
Maastrichtian	72.2 - 66.0	Jordan	L. ismaeli (166342)
Maastrichtian	72.2 - 66.0	Nigeria	L. afikpoense (82732 82734)