PBDB Taxon

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

Bifericeras

Cephalopoda - Ammonitida - Eoderoceratidae

Taxonomy

Bifericeras is a genus. It is not extant.

It was assigned to Eoderoceratidae by Blau et al. (2000); to Ammonoidea by Sepkoski (2002); and to Eoderoceratinae by Howarth (2013).

Species

B. bifer (syn. Turrilites valdani), B. nudicosta, B. subplanicosta

Synonyms

Microceras was named by Hyatt (1867).

It was replaced with Bifericeras by Howarth (2013).
Ophideroceras was named by Spath (1925).

It was synonymized subjectively with Bifericeras by Howarth (2013).
Hemimicroceras was named by Spath (1925).

It was synonymized subjectively with Bifericeras by Howarth (2013).

Synonymy list

Year	Name and author
1867	Microceras Hyatt
1925	Hemimicroceras Spath
1925	Ophideroceras Spath
2000	Bifericeras Blau et al. p. 271
2002	Bifericeras Sepkoski
2013	Bifericeras Howarth p. 40

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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
suborder	Ammonitina	Hyatt 1889
superfamily	Eoderoceratoidea	(Spath 1929)
family	Eoderoceratidae	Spath 1929
subfamily	Eoderoceratinae	Spath 1929
genus	Bifericeras

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. †Bifericeras

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†Bifericeras bifer Quenstedt 1845

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Invalid names: Turrilites valdani d'Orbigny 1843 [synonym]

†Bifericeras nudicosta Quenstedt 1845

†Bifericeras subplanicosta Oppel 1856

Invalid names: Hemimicroceras Spath 1925 [synonym], Microceras Hyatt 1867 [replaced], Ophideroceras Spath 1925 [synonym]

Diagnosis

No diagnoses are available

Measurements

No measurements are available

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 2004, Kiessling 2003

Age range: Oxynotum or 196.50000 to 189.60000 Ma

Collections (11 total)

Time interval	Ma	Country or state	Original ID and collection number
Early/Lower Sinemurian - Late/Upper Sinemurian	196.5 - 189.6	Mexico (Hidalgo)	B. tenangoense (208370)
Late/Upper Sinemurian	196.5 - 189.6	Mexico (Hidalgo)	B. tenangoense (208372 208373)
Late/Upper Sinemurian	196.5 - 189.6	United Kingdom (Gloucestershire)	B. sp. (204133) Hemimicroceras sp. (204132) Hemimicroceras subplanicosta (204131)
Oxynotum	196.5 - 189.6	United Kingdom (Somerset)	B. bifer, B. nudicosta (159474) B. sp., B. bifer (159472) B. sp., B. bifer, B. nudicosta (159471 159473)
Raricostatum	196.5 - 189.6	Germany	B. subplanicosta (189116)