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Ovalocephalus

Trilobita - Phacopida - Pliomeridae

Taxonomy
Ovalocephalus was named by Koroleva (1959). It is not extant. Its type is Ovalocephalus kelleri.

It was assigned to Hammatocnemidae by Kielan-Jaworowska et al. (1991); to Phacopida by Sepkoski (2002); to Pliomeridae by Jell and Adrain (2002); and to Hammatocneminae by Zhou and Zhou (2019).

Synonyms
Synonymy list
YearName and author
1959Ovalocephalus Koroleva
1960Hammatocnemis Kielan
1974Tzuchiatocnemis Sheng
1990Paratzuchiatocnemis Wu and Xia
1991Ovalocephalus Kielan-Jaworowska et al.
2002Ovalocephalus Jell and Adrain p. 416
2002Ovalocephalus Sepkoski
2002Paratzuchiatocnemis Sepkoski
2019Ovalocephalus Zhou and Zhou p. 160

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
EcdysozoaAguinaldo et al. 1997
Panarthropoda
phylumArthropodaLatreille 1829
RankNameAuthor
subphylumArtiopoda(Hou and Bergstrom)
classTrilobitaWalch 1771
orderPhacopidaSalter 1864
suborderCheirurinaHarrington and Leanza 1957
familyPliomeridaeRaymond 1913
subfamilyHammatocneminae(Kielan 1960)
genusOvalocephalusKoroleva 1959

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. †Ovalocephalus Koroleva 1959
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Ovalocephalus eoprimitivus Zhou and Zhou 2008
Ovalocephalus kelleri Koroleva 1959
Invalid names: Hammatocnemis Kielan 1960 [synonym], Paratzuchiatocnemis Wu and Xia 1990 [synonym], Tzuchiatocnemis Sheng 1974 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: low Mg calcitec
Composition 2: chitinc
Entire body: yesf
Adult length: 10 to < 100f
Adult width: 10 to < 100f
Ontogeny: molting, addition of partsc
Environment: marinec
Locomotion: fast-movingc
Life habit: low-level epifaunalc
Diet: carnivorec
Vision: well-developedf
Created: 2009-06-11 18:29:43
Modified: 2009-12-16 01:33:48
Source: f = family, c = class
References: Aberhan et al. 2004, Hendy 2009

Age range: base of the Floian to the top of the Pusgillian or 477.70000 to 449.20000 Ma

Collections (91 total)


Time interval Ma Country or state Original ID and collection number
Arenigian478.6 - 468.1China (Hunan) O. sp. (116206 116207 116210 116212 116220)
Arenigian478.6 - 468.1China (Hubei) O. primitivus (116198 116201 116202 116203) O. sp. (116205)
Dawan478.6 - 468.1China (Guizhou) Hammatocnemis sp. (7385)
Dawan478.6 - 468.1China (Sichuan) Hammatocnemis sp. (7659)
Arenig478.6 - 466.0China (XinJiang) Hammatocnemis sp. (20806)
Arenig478.6 - 466.0China (Hubei) Hammatocnemis sp. (4714 4715)
Floian477.7 - 470.0China (Hubei) O. eoprimitivus (221197 221198)
Floian477.7 - 470.0China (Hunan) O. sp. (226639)
Dapingian470.0 - 467.3China (Hubei) O. primitivus (116200)
Early/Lower Llanvirn468.0 - 461.1China (Yunnan) Hammatocnemis sp. (5423)
Llanvirn468.0 - 458.4China (Xinjiang) O. kanlingensis (188381)
Llandeilo461.1 - 458.4China (Guizhou) Hammatocnemis sp. (188421)
Costonian - Harnagian458.4 - 457.2China (GanSu) Hammatocnemis sp. (8551)
Harnagian - Longvillian458.4 - 455.0China (Sichuan) Hammatocnemis sp. (7645)
Soudleyan - Longvillian458.4 - 455.0China (Guizhou) Hammatocnemis sp. (5139)
Costonian - Marshbrookian458.4 - 454.0China (GanSu) Hammatocnemis sp. (8548)
Harnagian - Marshbrookian458.4 - 454.0China (Guizhou) Hammatocnemis sp. (7383)
Soudleyan - Marshbrookian458.4 - 454.0China (Sichuan) Hammatocnemis sp. (7256)
Soudleyan - Marshbrookian458.4 - 454.0China (JiangSu) Hammatocnemis sp. (7943)
Soudleyan - Marshbrookian458.4 - 454.0China (Hubei) Hammatocnemis sp. (4691)
Soudleyan - Marshbrookian458.4 - 454.0China (Guizhou) Hammatocnemis sp. (4745)
Harnagian - Actonian458.4 - 453.0China (Sichuan) Hammatocnemis sp. (7656)
Sandbian458.4 - 453.0China (Gansu) Hammatocnemis obsoletus, Hammatocnemis kanlingensis (182201) O. kelleri (182202)
Caradoc458.4 - 449.5China (ZheJiang) Hammatocnemis sp. (7769 7781 7810)
Caradoc458.4 - 449.5China (XinJiang) Hammatocnemis sp. (20801 20802)
Caradoc458.4 - 449.5China (QingHai) Hammatocnemis sp. (23600)
Caradoc458.4 - 449.5China (Guizhou) O. yangtzeensis, O. ovatus (182197 182198 182199 182200)
Caradoc458.4 - 449.5China (YunNan) Hammatocnemis sp. (7743)
Longvillian457.2 - 455.0China (ShanXi) Hammatocnemis sp. (7885)
Longvillian - Marshbrookian457.2 - 454.0China (ShanXi) Hammatocnemis sp. (7918)
Longvillian - Marshbrookian457.2 - 454.0China (Anhui) Hammatocnemis sp. (7836)
Longvillian - Marshbrookian457.2 - 454.0China (Hunan) Hammatocnemis sp. (7689)
Longvillian - Onnian457.2 - 449.5China (Sichuan) Hammatocnemis sp. (7644 7655)
Marshbrookian455.0 - 454.0China (ShanXi) Hammatocnemis sp. (7883)
Actonian - Onnian454.0 - 449.5China (ShanXi) Hammatocnemis sp. (7882 7917)
Actonian - Onnian454.0 - 449.5China (Hunan and Hubei) Hammatocnemis sp. (7714)
Actonian - Onnian454.0 - 449.5China (Guizhou) Hammatocnemis sp. (5137)
Actonian - Onnian454.0 - 449.5China (Hubei) Hammatocnemis sp. (4690)
Actonian - Onnian454.0 - 449.5China (AnHui) Hammatocnemis sp. (7835 7848 7858)
Actonian - Onnian454.0 - 449.5China (ZheJiang) Hammatocnemis sp. (7779 7804 7809)
Actonian - Onnian454.0 - 449.5China (Hunan) Hammatocnemis sp. (7688 7697)
Actonian - Onnian454.0 - 449.5China (Sichuan) Hammatocnemis sp. (5338 7255 7667)
Actonian - Onnian454.0 - 449.5China (JiangXi) Hammatocnemis sp. (7749)
Actonian - Onnian454.0 - 449.5China (JiangSu) Hammatocnemis sp. (7942) O. sp. (7929)
Actonian - Cautleyan454.0 - 448.8Iran (Gilan) O. tetrasulcatus (232879 232880)
Katian453.0 - 445.2China O. sp. (236250)
Katian453.0 - 445.2China (JiangSu) O. decorosus (192795) O. decorosus, O. ovatus (192793 192794 192796)
Katian453.0 - 445.2China (Xinjiang) O. kanlingensis (188364) O. kelleri, O. kanlingensis (188385)
Kralodvorian449.8 - 445.2Italy (Sardinia) O. tetrasulcatus (75890 192914)
Kralodvorian449.8 - 445.2Spain (Zaragoza) O. sp., Hammatocnemis sp. (21057)
Pusgillian449.5 - 449.2China (Guizhou) Hammatocnemis sp. (4750 7382)
Pusgillian449.5 - 449.2China (Hubei) Hammatocnemis sp. (4689)
Pusgillian - Cautleyan449.5 - 448.8China (JiangSu) Hammatocnemis sp. (7872)
Ashgill449.5 - 443.7China (Hubei) O. decorosus (114989)
Ashgill449.5 - 443.7Spain (Aragon) O. sp. (163399) O. tetrasulcatus (80725 80768)