PBDB Taxon

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Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Pseudocalycoceras

Cephalopoda - Ammonitida - Acanthoceratidae

Taxonomy

Pseudocalycoceras was named by Thomel (1969) [Sepkoski's age data: K Ceno-u].

It was assigned to Acanthoceratidae by Cobban (1988); to Ammonoidea by Sepkoski (2002); and to Acanthoceratinae by Cooper (1978), Wright et al. (1996) and Ahmad et al. (2013).

Species

P. (Haugiceras), P. (Pseudocalycoceras), P. angolaense (syn. Eucalycoceras lewisvillense, Eucalycoceras indianense, Eucalycoceras underwoodi, Eucalycoceras dentonense), P. harpax

Species lacking formal opinion data

P. judaicum

Synonyms

Pseudocalycoceras (Haugiceras) was named by Thomel (1972).

It was considered an invalid subgroup of Pseudocalycoceras by Cooper (1978).

It was assigned to Pseudocalycoceras by Thomel (1972).

Synonymy list

Year	Name and author
1969	Pseudocalycoceras Thomel p. 650
1972	Pseudocalycoceras (Haugiceras) Thomel
1978	Pseudocalycoceras Cooper p. 93
1988	Pseudocalycoceras Cobban p. 12
1996	Pseudocalycoceras Wright et al. p. 164
2002	Pseudocalycoceras Sepkoski
2013	Pseudocalycoceras Ahmad et al. p. 27

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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	Acanthoceratoidea	(de Grossouvre 1894)
family	Acanthoceratidae	Grossouvre 1894
subfamily	Acanthoceratinae	de Groussouvre 1894
genus	Pseudocalycoceras	Thomel 1969

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. †Pseudocalycoceras Thomel 1969

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†Eucalycoceras harpax tulearensis Collignon 1937

Subg. †Pseudocalycoceras (Pseudocalycoceras) Thomel 1969

†Pseudocalycoceras angolaense Spath 1931

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Invalid names: Eucalycoceras dentonense Moreman 1942 [synonym], Eucalycoceras indianense Moreman 1942 [synonym], Eucalycoceras lewisvillense Moreman 1942 [synonym], Eucalycoceras underwoodi Powell 1963 [synonym]

†Pseudocalycoceras harpax Stoliczka 1864

Invalid names: Pseudocalycoceras (Haugiceras) Thomel 1972 [invalid subgroup]

Diagnosis

Reference	Diagnosis
C. W. Wright et al. 1996	Slightly compressed to slightly depressed; ribs flexuous to convex and prorsiradiate, more or less regularly branching or long and short; primaries arising from umbilical bullae, characteristically twisted; all ribs with inner ventrolateral nodes or clavi and outer ventrolateral and siphonal clavi; on latter part of body chamber ribs narrow, approximate, and generally recurved; tubercles disappearing.

Measurements

part	N	mean	minimum	maximum	median	s.d.
shell height	8	19.1	11.0	29.0	20.5	6.69
shell diameter	8	47.5	22.0	75.0	49.0	19.5
shell inflation	8	13.6	4.00	28.0	14.5	8.62

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 Late/Upper Cenomanian to the top of the Cenomanian or 99.60000 to 93.90000 Ma

Collections (36 total)

Time interval	Ma	Country or state	Original ID and collection number
Cenomanian	100.5 - 93.9	Antarctica	P. judaicum (83561)
Cenomanian	100.5 - 93.9	India	P. harpax (217149 217150 217155 217156 217157 217158 217159) P. sp. (217154)
Cenomanian	100.5 - 93.9	France	Eucalycoceras harpax, Eucalycoceras tulearensis (230798)
Cenomanian	100.5 - 93.9	USA (Arizona)	P. sp. (3077)
Late/Upper Cenomanian	99.6 - 93.5	France	Eucalycoceras harpax, Eucalycoceras tulearensis (230895)
Late/Upper Cenomanian	99.6 - 93.5	USA (Texas)	P. angolaense (177097 177098 230848)
Late/Upper Cenomanian	99.6 - 93.5	Angola	P. angolaense (175545)
Late/Upper Cenomanian	99.6 - 93.5	Jordan	P. harpax (178485)
Late/Upper Cenomanian	99.6 - 93.5	USA (Colorado)	P. angolaense (176980) P. dentonense (78164)
Late/Upper Cenomanian	99.6 - 93.5	USA (Arizona)	P. angolaense (53505 54154 55436 55816)
Late/Upper Cenomanian	99.6 - 93.5	Germany (Sachsen)	P. angolaense (172055 172057)
Late/Upper Cenomanian	99.6 - 93.5	USA (Utah)	P. sp. (3326 44164)
Late/Upper Cenomanian	99.6 - 93.5	USA (New Mexico)	P. angolaense (175425 177094 177095 177096 230782) P. angolaense, P. dentonense (167817)
Middle Cenomanian	99.6 - 93.5	Tunisia (Sidi Bou Zid)	P. jullieni, P. judaicum (217162)
Middle Cenomanian - Late/Upper Cenomanian	99.6 - 93.5	Brazil	P. harpax (140839)
Late/Upper Cenomanian - Early/Lower Turonian	99.6 - 89.3	Jordan	P. alaouitense (140950)