PBDB Taxon

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

Arctocephalites (Cranocephalites)

Cephalopoda - Ammonitida - Cardioceratidae

Taxonomy

Cranocephalites was named as a genus. It is not extant.

It was reranked as Arctocephalites (Cranocephalites) by Imlay (1962).

It was assigned to Cadoceratinae by Arkell et al. (1957); to Arctocephalites by Imlay (1962); and to Ammonoidea by Sepkoski (2002).

Subtaxa

Arctocephalites (Cranocephalites) costidensus, Arctocephalites (Cranocephalites) gracilis, Arctocephalites (Cranocephalites) maculatus, Arctocephalites (Cranocephalites) platynotus, Arctocephalites (Cranocephalites) pompeckji, Arctocephalites (Cranocephalites) sawtoothensis

Species lacking formal opinion data

Arctocephalites sphaericus

Synonymy list

Year	Name and author
1957	Cranocephalites Arkell et al. p. 301
1962	Arctocephalites (Cranocephalites) Imlay
2002	Cranocephalites Sepkoski

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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	Haeckel 1866
suborder	Ammonitina	Hyatt 1889
superfamily	Stephanoceratoidea	(Newmayr 1875)
family	Cardioceratidae	Siemiradzki 1891
subfamily	Arctocephalitinae	Meledina 1968
genus	Arctocephalites
subgenus	Cranocephalites

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.

Subg. †Arctocephalites (Cranocephalites)

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†Arctocephalites (Cranocephalites) costidensus Imlay 1962

†Arctocephalites (Cranocephalites) gracilis Spath 1932

†Arctocephalites (Cranocephalites) maculatus Spath 1932

†Arctocephalites (Cranocephalites) platynotus Spath 1932

†Arctocephalites (Cranocephalites) pompeckji Madsen 1904

†Arctocephalites (Cranocephalites) sawtoothensis Imlay 1948

Diagnosis

No diagnoses are available

Measurements

part	N	mean	minimum	maximum	median	s.d.
shell height	2	33.7	27.0	42.0	34.5	10.6
shell diameter	2	77.1	62.0	96.0	79.0	24.0
shell inflation	2	15.5	15.0	16.0	15.5	0.707

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: Bathonian or 168.20000 to 165.30000 Ma

Collections (33 total)

Time interval	Ma	Country or state	Original ID and collection number
Bathonian	168.2 - 165.3	USA (Alaska)	Arctocephalites costidensus (68754 68758 68759 68761 68769 68806) Arctocephalites pompeckji (68770 68772 68805) Arctocephalites pompeckji, Arctocephalites costidensus (68771 68773 68774) Arctocephalites sp. (68755 68766 68790 68793 68800 68802 68804 68807 68820)
Bathonian	168.2 - 165.3	USA (Montana)	Arctocephalites gracilis (68865) Arctocephalites maculatus (68851 68861) Arctocephalites sawtoothensis (68843 68846 68854 68860 68863) Arctocephalites sawtoothensis, Arctocephalites gracilis, Arctocephalites platynotus (68844) Arctocephalites sawtoothensis, Arctocephalites maculatus (68850 68856) Arctocephalites sp. (68859)