PBDB Taxon

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

Mortoniceras (Deiradoceras) bispinosum

Cephalopoda - Ammonitida - Brancoceratidae

Taxonomy

Subschloenbachia bispinosa was named by Spath (1921). It is a 3D body fossil.

It was recombined as Mortoniceras (Deiradoceras) bispinosum by Förster (1975); it was recombined as Hysteroceras bispinosa by Besairie and Collignon (1972), Besairie and Collignon (1972), Novack-Gottshall (2025).

Sister species lacking formal opinion data

Deiradoceras hirtzi, Deiradoceras hubaulti, Deiradoceras praerostatum, Deiradoceras varicostatum, Deiradoceras varisectum, Deiradoceras mokarahense, M. arietiforme, M. evolutum

Synonyms

Deiradoceras besairiei was named by Collignon (1950).

It was synonymized subjectively with Mortoniceras (Deiradoceras) bispinosum by Förster (1975).
Deiradoceras fibulatum was named by Collignon (1950).

It was synonymized subjectively with Mortoniceras (Deiradoceras) bispinosum by Förster (1975).
Inflaticeras africanum was named by Spath (1925).

It was synonymized subjectively with Mortoniceras (Deiradoceras) bispinosum by Förster (1975).

Synonymy list

Year	Name and author
1921	Subschloenbachia bispinosa Spath pp. 285-286 figs. pl. 24, fig. 9
1925	Inflaticeras africanum Spath p. 183 figs. Pl 29, fig 2
1950	Deiradoceras besairiei Collignon p. 75 figs. Pl 12, figs 3,4; text-fig 5
1950	Deiradoceras fibulatum Collignon p. 76 figs. Pl 13, fig 2
1972	Hysteroceras bispinosa Besairie and Collignon
1975	Mortoniceras (Deiradoceras) bispinosum Förster p. 228 figs. Pl 12, figs 2,5; text-fig 73
2025	Hysteroceras bispinosa Novack-Gottshall

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca
class	Cephalopoda	Cuvier 1797
subclass	Ammonoidea	()

Rank	Name	Author
order	Ammonitida	Haeckel 1866
suborder	Ammonitina	Hyatt 1889
superfamily	Acanthoceratoidea	(de Grossouvre 1894)
family	Brancoceratidae
subfamily	Mortoniceratinae	Douvillé 1912
genus	Mortoniceras	Meek 1876
subgenus	Deiradoceras	()
species	bispinosum	()

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.

†Mortoniceras (Deiradoceras) bispinosum Spath 1921

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Invalid names: Deiradoceras besairiei Collignon 1950 [synonym], Deiradoceras fibulatum Collignon 1950 [synonym], Inflaticeras africanum Spath 1925 [synonym]

Diagnosis

No diagnoses are available

Measurements

part	N	mean	minimum	maximum	median	s.d.
shell height	4	65.3	54.0	85.0	63.5	14.8
shell diameter	4	190.0	150.0	255.0	187.5	51.2
shell inflation	4	86.2	64.0	125.0	86.0	31.1

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: Late/Upper Albian or 106.30000 to 100.50000 Ma

Collections (4 total)

Time interval	Ma	Country or state	Original ID and collection number
Albian	113.2 - 100.5	Madagascar	Deiradoceras besairiei (98245 98264)
Middle Albian - Late/Upper Albian	110.1 - 100.5	Madagascar (Mahajanga)	Deiradoceras besairiei, Deiradoceras fibulatum (86506)
Late/Upper Albian	106.3 - 100.5	Mozambique	Mortoniceras bispinosum (174617)