PBDB Taxon

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

Pseudaspidoceras

Cephalopoda - Ammonitida - Acanthoceratidae

Taxonomy

Pseudaspidoceras was named by Hyatt (1903) [Sepkoski's age data: K Ceno-u K Turo-l Sepkoski's reference number: 716 Sepkoski's age data: K Turo].

It was reranked as Mammites (Pseudaspidoceras) by Pervinquière (1907); it was corrected as Pseudoaspidoceras by Benavides-Caceres (1956).

It was assigned to Mammites by Pervinquière (1907); to Mammitidae by Reyment (1954), Benavides-Caceres (1956); to Acanthoceratidae by Howarth (1985); to Mammitinae by Chancellor (1982), Meister (1989), Meister et al. (1992); to Ammonoidea by Bengtson (1983), Sepkoski (2002); and to Euomphaloceratinae by Kennedy et al. (1987), Kennedy and Simmons (1991), Zaborski (1995), Wright et al. (1996), Meister et al. (2003), Gale et al. (2005), Ifrim and Stinnesbeck (2007), Aly et al. (2008), Guendouz et al. (2022).

Species

P. armatum, P. barberi, P. conciliatum, P. curvicostatum, P. flexuosum (syn. P. collignoni), P. footeanum (syn. P. pedroanum), P. paganum, P. pseudonodosoides, P. reesidei, P. tassaraensis

Species lacking formal opinion data

P. grecoi, P. nodosum

Entered

by J. Sepkoski on 2003-01-23; modified by P. Wagner on 2024-09-18

Synonyms

Ampakabites was named by Collignon (1965).

It was synonymized subjectively with Pseudaspidoceras by Kennedy et al. (1987).

Synonymy list

Year	Name and author
1903	Pseudaspidoceras Hyatt p. 106
1907	Mammites (Pseudaspidoceras) Pervinquière
1954	Pseudaspidoceras Reyment p. 253
1956	Pseudoaspidoceras Benavides-Caceres p. 468
1965	Ampakabites Collignon
1982	Pseudaspidoceras Chancellor p. 90
1983	Pseudoaspidoceras Bengtson
1985	Pseudaspidoceras Howarth p. 97
1987	Pseudaspidoceras Kennedy et al. p. 34
1989	Pseudaspidoceras Meister p. 6
1991	Pseudaspidoceras Kennedy and Simmons p. 138
1992	Pseudaspidoceras Meister et al. p. 66
1995	Pseudaspidoceras Zaborski
1996	Pseudaspidoceras Wright et al. pp. 167 - 171
2002	Pseudoaspidoceras Sepkoski
2003	Pseudaspidoceras Meister et al. p. 342
2005	Pseudaspidoceras Gale et al. p. 179
2007	Pseudaspidoceras Ifrim and Stinnesbeck p. 648
2008	Pseudaspidoceras Aly et al. p. 47
2022	Pseudaspidoceras Guendouz et al. p. 2168

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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	Acanthoceratoidea	(de Grossouvre 1894)
family	Acanthoceratidae	Grossouvre 1894
subfamily	Euomphaloceratinae
genus	Pseudaspidoceras

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. †Pseudaspidoceras Hyatt 1903

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†Pseudaspidoceras armatum Pervinquière 1907

†Pseudaspidoceras barberi Meister 1989

†Pseudaspidoceras conciliatum Stoliczka 1865

†Pseudaspidoceras curvicostatum Reyment 1955

†Pseudaspidoceras flexuosum Powell 1963

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Invalid names: Pseudaspidoceras collignoni Cobban and Scott 1972 [synonym]

†Pseudaspidoceras footeanum Stolickzka 1864

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Invalid names: Pseudaspidoceras pedroanum White 1887 [synonym]

†Pseudaspidoceras paganum Reyment 1954

†Pseudaspidoceras pseudonodosoides Choffat 1898

†Pseudaspidoceras reesidei Benavides-Caceres 1956

†Pseudaspidoceras tassaraensis Meister et al. 1992

Invalid names: Ampakabites Collignon 1965 [synonym]

Diagnosis

Reference	Diagnosis
C. W. Wright et al. 1996	Early whorls slightly inflated to slightly compressed; more or less flatsided; distant primary ribs with umbilical bullae, strong inner and weaker outer ventrolateral tubercles; irregular, weak, branching or intercalated secondary ribs bearing outer ventrolateral tubercles only; flat venter with or without slight, transverse constrictions. Later whorl height increasing, with square or rectangular section; ribs weaken and may be looped on sides; outer ventrolateral tubercles weakening or disappearing. Suture with moderately short to long elements.

Measurements

part	N	mean	minimum	maximum	median	s.d.
shell height	9	35.1	19.0	83.0	33.0	21.9
shell diameter	9	92.7	45.0	245.5	72.0	83.8
shell inflation	9	31.3	14.0	89.9	24.0	32.5

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: base of the Cenomanian to the top of the Middle Turonian or 100.50000 to 89.80000 Ma

Collections (76 total)

Time interval	Ma	Country or state	Original ID and collection number
Cenomanian	100.5 - 93.9	Algeria	P. grecoi, P. sp., P. pseudonodosoides (217148)
Late/Upper Cenomanian	100.5 - 93.9	USA (Texas)	P. sp. (177107)
Late/Upper Cenomanian	100.5 - 93.9	Brazil	P. pseudonodosoides (141016) P. pseudonodosoides, Pseudoaspidoceras footeanum (140840)
Late/Upper Cenomanian	100.5 - 93.9	Gabon	P. paganum (175459)
Late/Upper Cenomanian	100.5 - 93.9	Niger	Mammites conciliatum (175479)
Late/Upper Cenomanian	100.5 - 93.9	Nigeria	P. paganum (175533) P. pseudonodosoides (175520 175521)
Late/Upper Cenomanian	100.5 - 93.9	USA (Arizona)	P. flexuosum (55818) P. pseudonodosoides (55565)
Late/Upper Cenomanian	100.5 - 93.9	Algeria	P. pseudonodosoides (227886 227888)
Late/Upper Cenomanian	100.5 - 93.9	Libya	P. pseudonodosoides (208633 208635 208636)
Late/Upper Cenomanian	100.5 - 93.9	USA (New Mexico)	P. pseudonodosoides (230778 230855) P. pseudonodosoides, P. flexuosum (229802)
Late/Upper Cenomanian	100.5 - 93.9	USA (Utah)	P. sp. (3331 3692)
Late/Upper Cenomanian	100.5 - 93.9	Angola	P. footeanum (70955)
Late/Upper Cenomanian	100.5 - 93.9	Egypt	P. pseudonodosoides (114798 114813)
Late/Upper Cenomanian	100.5 - 93.9	Tunisia	P. pseudonodosoides (88841) P. sp. (161148)
Late/Upper Cenomanian - Early/Lower Turonian	100.5 - 89.8	Gabon	P. paganum (175455)
Late/Upper Cenomanian - Early/Lower Turonian	100.5 - 89.8	Nigeria	P. paganum (82779 83024 175537)
Early/Lower Turonian	93.9 - 89.8	Egypt	P. flexuosum (140719)
Early/Lower Turonian	93.9 - 89.8	Niger	P. tassaraensis (175450 175451 175452 175453)
Early/Lower Turonian	93.9 - 89.8	USA (Texas)	P. flexuosum (80991)
Early/Lower Turonian	93.9 - 89.8	USA (Colorado)	Ampakabites collignoni (87872) P. flexuosum (230903)
Early/Lower Turonian	93.9 - 89.8	Nigeria	Mammites sp. (117606) P. barberi (175525) P. curvicostatum (82782) P. paganum (83021 83025 175524 209706 210137) P. sp. (82781) P. sp., P. paganum (83026)
Early/Lower Turonian	93.9 - 89.8	Tunisia	P. flexuosum (88842)
Early/Lower Turonian	93.9 - 89.8	Venezuela	P. sp. (88078)
Early/Lower Turonian	93.9 - 89.8	India (Tamil Nadu)	Mammites conciliatum (46391)
Early/Lower Turonian	93.9 - 89.8	Jordan	P. flexuosum (178493 178498 178503 178505)
Early/Lower Turonian	93.9 - 89.8	Brazil	Pseudoaspidoceras footeanum (140888)
Early/Lower Turonian	93.9 - 89.8	USA (Arizona)	P. flexuosum (53936)
Early/Lower Turonian	93.9 - 89.8	Germany (Sachsen)	P. footeanum (172058 172059 172060)
Early/Lower Turonian	93.9 - 89.8	Colombia	P. nodosum (46997 46998)
Early/Lower Turonian	93.9 - 89.8	Venezuela (Trujillo)	P. armatum (88076 88079)
Early/Lower Turonian	93.9 - 89.8	Oman	P. sp. (82360)
Early/Lower Turonian	93.9 - 89.8	Brazil (Sergipe)	P. flexuosum (175461) P. pedroanum (87858)
Early/Lower Turonian	93.9 - 89.8	Mexico (Nuevo Leon)	P. flexuosum (87882) P. pseudonodosoides, P. flexuosum (87879 87880 87881)
Early/Lower Turonian	93.9 - 89.8	Mexico (Nuevo León)	P. pseudonodosoides (219108)
Early/Lower Turonian	93.9 - 89.8	Mexico	P. sp., P. pedroanum (73575)
Early/Lower Turonian	93.9 - 89.8	France	Mammites pseudonodosoides (82852)
Early/Lower Turonian - Middle Turonian	93.9 - 89.8	Egypt	P. flexuosum (138418)
Early/Lower Turonian - Middle Turonian	93.9 - 89.8	Russian Federation (Sakhalin)	P. armatum (64571)