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Harpoceras subplanatum

Cephalopoda - Ammonitida - Hildoceratidae

Taxonomy
Ammonites subplanatus was named by Oppel (1856).

It was recombined as Harpoceras (Harpoceras) subplanatum by Bécaud (2006) and Kovács (2011); it was recombined as Harpoceras subplanatum by Guex (1972), Howarth (1992), Stevens (2007) and Benzaggagh et al. (2022).

Sister species lacking formal opinion data

Synonyms
Synonymy list
YearName and author
1846Ammonites complanatus d'Orbigny p. 353 figs. Pl. 114, figs 1–2, 4 (non fig. 3).
1856Ammonites subplanatus Oppel p. 244
1972Harpoceras subplanatum Guex figs. Pl 5, fig 8
1992Harpoceras subplanatum Howarth p. 136 figs. Pl 22, figs 4-7; pl 23, figs 1-3; text-figs 18H,29,35,36
2006Harpoceras (Harpoceras) subplanatum Bécaud p. 65 figs. Pl 25, fig 1; pl 31, fig 2
2007Harpoceras subplanatum Stevens p. 379 figs. 3-5
2011Harpoceras (Harpoceras) subplanatum Kovács p. 32 figs. Pl 8, figs 3,4; pl 11, fig 3
2022Harpoceras subplanatum Benzaggagh et al. p. 13 figs. 10F-H

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
superphylumLophotrochozoa
phylumMollusca
classCephalopodaCuvier 1797
RankNameAuthor
subclassAmmonoidea()
orderAmmonitida
suborderAmmonitinaHyatt 1889
superfamilyHildoceratoidea(Hyatt 1867)
familyHildoceratidaeHyatt 1867
subfamilyHarpoceratinaeNeumayr 1875
genusHarpoceras
speciessubplanatum(Oppel 1856)

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.

Harpoceras subplanatum Oppel 1856
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Invalid names: Ammonites complanatus d'Orbigny 1846 [replaced]
Diagnosis
No diagnoses are available
Measurements
partNmeanminimummaximummedians.d.
height280.080.080.080.0-
diameter2170.0170.0170.0170.0-
inflation233.533.034.033.50.707
shell height353.236.598.042.034.0
shell diameter3102.971.0210.073.079.7
shell inflation318.510.044.014.518.5

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 2003, Kiessling 2004

Age range: base of the Toarcian to the top of the Late/Upper Toarcian or 182.70000 to 175.60000 Ma

Collections (45 total)


Time interval Ma Country or state Original ID and collection number
Early/Lower Jurassic201.3 - 174.1Italy (Trento) Ammonites complanatus (232106)
Ururoan189.6 - 175.6New Zealand Harpoceras subplanatum (134146 137844)
Early/Lower Toarcian183.0 - 182.0Canada (British Columbia) Harpoceras subplanatum (55803)
Falciferum183.0 - 182.0Hungary Harpoceras subplanatum (148233 148259)
Falciferum183.0 - 182.0Morocco Harpoceras subplanatum (228342 228343)
Early/Lower Toarcian - Middle Toarcian183.0 - 175.6Canada (British Columbia) Harpoceras subplanatum (53094 53095 53097 53621 55805 55806 55808)
Toarcian182.7 - 174.1France Harpoceras subplanatum (210801 210834)
Toarcian182.7 - 174.1Chile (Coquimbo) Harpoceras subplanatum (222004 222007)
Bifrons182.0 - 175.6Spain (Cantabria) Harpoceras subplanatum (222291 222292 222297)
Bifrons182.0 - 175.6Spain Harpoceras subplanatum (126481 126482 146934)
Bifrons182.0 - 175.6France (Deux-Sevrès) Harpoceras subplanatum (140866 140867 140868 140869 147157 147158 147159 147160)
Bifrons182.0 - 175.6Morocco Harpoceras subplanatum (228349)
Bifrons182.0 - 175.6France (Vendée) Harpoceras subplanatum (140787)
Bifrons182.0 - 175.6Italy Harpoceras subplanatum (147043)
Bifrons182.0 - 175.6France Harpoceras subplanatum (148788 148789 161649 161653 161654 170473)
Middle Toarcian182.0 - 175.6Canada (British Columbia) Harpoceras subplanatum (55804 55807)
Middle Toarcian - Late/Upper Toarcian182.0 - 175.6Morocco (Taza-Al Hoceima-Taounate) Harpoceras subplanatum (234054)