PBDB Taxon

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

Polyplectus

Cephalopoda - Ammonitida - Hildoceratidae

Taxonomy

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

It was reranked as Harpoceras (Polyplectus) by Haas (1913).

It was assigned to Harpoceras by Haas (1913); to Ammonoidea by Sepkoski (2002); and to Harpoceratinae by Pallini et al. (2004), Howarth (2013), Benzaggagh et al. (2022).

Species

P. appenninicus, P. discoides (syn. Oxynoticeras meunieri), P. pluricostatum, P. pluricostatus

Species lacking formal opinion data

P. quadrifidus

Synonyms

Micropolyplectus was named by Guex (1973).

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

Synonymy list

Year	Name and author
1913	Harpoceras (Polyplectus) Haas
1973	Micropolyplectus Guex
2002	Polyplectus Sepkoski
2004	Polyplectus Pallini et al. p. 7
2013	Polyplectus Howarth p. 76
2022	Polyplectus Benzaggagh et al. p. 10

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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	Hildoceratoidea	(Hyatt 1867)
family	Hildoceratidae	Hyatt 1867
subfamily	Harpoceratinae	Neumayr 1875
genus	Polyplectus

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. †Polyplectus

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†Polyplectus appenninicus Haas 1913

†Polyplectus discoides Zittel 1831

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Invalid names: Oxynoticeras meunieri Monestier 1921 [synonym]

†Polyplectus pluricostatum Haas 1913

†Polyplectus pluricostatus Haas 1913

Invalid names: Micropolyplectus Guex 1973 [synonym]

Diagnosis

No diagnoses are available

Measurements

part	N	mean	minimum	maximum	median	s.d.
height	5	28.9	17.0	50.0	25.0	14.9
diameter	5	58.4	38.3	93.0	48.0	26.6
inflation	5	8.25	4.00	19.0	9.00	6.31
shell height	2	41.0	39.8	42.2	41.0	1.70
shell diameter	2	73.0	71.2	74.8	73.0	2.55
shell inflation	2	7.21	6.50	8.00	7.25	1.06

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 Falciferum to the top of the Hauterivian or 184.20000 to 125.77000 Ma

Collections (114 total)

Time interval	Ma	Country or state	Original ID and collection number
Early/Lower Toarcian	184.2 - 182.9	Spain (Granda)	P. discoides (201064 201076 201079 201080 201081 201082)
Early/Lower Toarcian	184.2 - 182.9	Spain (Murcia)	P. discoides (201421)
Falciferum	184.2 - 182.9	Spain	P. pluricostatus (114367 114369 146889)
Falciferum	184.2 - 182.9	Hungary	P. pluricostatus (148248 148259 148268)
Falciferum	184.2 - 182.9	France (Deux-Sevrès)	P. pluricostatus (140862)
Falciferum	184.2 - 182.9	Italy	P. pluricostatus (145310 147074) P. sp. (145318)
Falciferum	184.2 - 182.9	Morocco	P. pluricostatum (228344) P. sp., P. pluricostatum (228345)
Early/Lower Toarcian - Middle Toarcian	184.2 - 180.4	Canada (Yukon)	P. sp. (197430)
Toarcian	184.2 - 174.7	Canada (British Columbia)	P. sp. (37557)
Toarcian	184.2 - 174.7	France	P. discoides (210796 210798 210820 210861 210864 210877 210878 210880 210881)
Middle Toarcian	182.9 - 180.4	Canada (British Columbia)	P. discoides (55779 55780 56339 56340 56343 56344) P. sp. (55795 56348)
Middle Toarcian	182.9 - 180.4	Tunisia	P. pluricostatus (170601)
Bifrons	182.9 - 174.7	Hungary	P. pluricostatus (108046 108053 108068 108084 108087 108101 108102 108201 108205 108459 108460 108461 108462 108465 147243 147256 148242)
Bifrons	182.9 - 174.7	Italy	P. discoides (147041 147043) P. pluricostatus (145312 147028 147029 147030 147034 147036 147039)
Bifrons	182.9 - 174.7	Italy (Sicily)	P. pluricostatus, P. appenninicus (151230)
Levesquei	182.9 - 174.7	France (Deux-Sevrès)	P. discoides (140875)
Levesquei	182.9 - 174.7	Hungary	P. pluricostatus (146436)
Levesquei	182.9 - 174.7	Germany	P. discoides (59423)
Levesquei	182.9 - 174.7	Spain	P. discoides (147091 147095 147096 147097 147100)
Levesquei	182.9 - 174.7	France	P. discoides (148812)
Middle Toarcian - Late/Upper Toarcian	182.9 - 174.7	Morocco (Taza-Al Hoceima-Taounate)	P. discoides, P. appenninicus (234054)
Middle Toarcian - Late/Upper Toarcian	182.9 - 174.7	Canada (British Columbia)	P. discoides (56345) P. sp. (55792 56350)
Variabilis	182.9 - 174.7	Spain	P. discoides (126520 126521 131824)
Variabilis	182.9 - 174.7	Luxembourg	P. discoides (141384)
Variabilis	182.9 - 174.7	Hungary	P. pluricostatus (108469 108471)
Variabilis	182.9 - 174.7	France	P. pluricostatus (161665)
Late/Upper Toarcian	180.4 - 174.7	Hungary	P. discoides (108574 108575)
Late/Upper Toarcian	180.4 - 174.7	Spain (Granada)	P. discoides (201294 201298 201300 201335 201338)
Late/Upper Toarcian	180.4 - 174.7	France	P. discoides (161668 161670 161671)
Late/Upper Toarcian	180.4 - 174.7	Spain	P. discoides (73289 147129)
Late/Upper Toarcian	180.4 - 174.7	Canada (British Columbia)	P. discoides (56341 56342 56347) P. sp. (56349)
Thouarsense	180.4 - 174.7	Spain	P. discoides (146976 146977 146979 146980 146981 147086 147088 147089)
Thouarsense	180.4 - 174.7	Bulgaria	P. discoides (151010)
Thouarsense	180.4 - 174.7	Hungary	P. discoides (108568 108678)
Hauterivian	132.6 - 125.77	France	P. quadrifidus (96668)