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Leiostegium

Trilobita - Corynexochida - Leiostegiidae

Taxonomy
Leiostegium was named by Raymond (1913) [Sepkoski's age data: O Trem-l O Trem-u Sepkoski's reference number: 16,795]. Its type is Bathyurus quadratus.

It was assigned to Corynexochida by Sepkoski (2002); and to Leiostegiidae by Jell and Adrain (2002) and Fortey and Bruton (2013).

Synonyms
Synonymy list
YearName and author
1913Leiostegium Raymond
1978Alloleiostegium Zhou and Zhang
2002Leiostegium Jell and Adrain p. 396
2002Leiostegium Sepkoski
2013Leiostegium Fortey and Bruton

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Ecdysozoa
—Panarthropoda
phylumArthropodaLatreille 1829
RankNameAuthor
subphylumArtiopoda(Hou and Bergstrom)
classTrilobitaWalch 1771
orderCorynexochida
suborderLeiostegiinaBradley 1925
superfamilyLeiostegioideaBradley 1925
familyLeiostegiidaeBradley 1925
genusLeiostegiumRaymond 1913

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. †Leiostegium Raymond 1913
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Subg. †Leiostegium (Euleiostegium) Zhou and Zhan 1978
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Subg. †Leiostegium (Perischodory) Raymond 1937
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†Perischodory incompertum Berg and Ross 1959
†Leiostegium manitouensis Walcott 1925
†Leiostegium proprium Boyce 1989
†Leiostegium quadratus Billings 1860
†Leiostegium spongiosum Fortey and Bruton 2013
†Leiostegium tyboensis Ross 1970
Invalid names: Alloleiostegium Zhou and Zhang 1978 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: low Mg calcitec
Composition 2: chitinc
Entire body: yesg
Adult length: 10 to < 100g
Adult width: 10 to < 100g
Spines: minorg
Ontogeny: molting, addition of partsc
Environment: marinec
Locomotion: actively mobileo
Life habit: nektobenthico
Diet: carnivoreo
Vision: well-developedf
Comments: BODY SIZE: Data from Harrington et al. (1959).g
Created: 2009-06-10 08:32:32
Modified: 2009-06-10 10:32:32
Source: g = genus, f = family, o = order, c = class
References: Hendy et al. 2009, Aberhan et al. 2004, Hendy 2009, Whittington et al. 1997

Age range: base of the Tremadoc to the top of the Tremadocian or 486.50000 to 477.70000 Ma

Collections (53 total)


Time interval Ma Country or state Original ID and collection number
Cambrian538.8 - 485.4China (Jilin Provence) L. floodi (156930)
Franconian497.0 - 485.4USA (Idaho) L. sp. (251)
Niuchehean489.5 - 485.4China (Hunan) L. constrictum (126682 126683 126731) L. constrictum, L. planum (107335)
Niuchehean489.5 - 485.4China (Jilin Provence) Alloleiostegium latilum (156909 156912)
Datsonian488.3 - 485.4Australia (Queensland) L. sp. (77482)
Datsonian488.3 - 485.4China (Jilin Provence) L. dayangchaensis, L. floodi (156929)
Tremadoc486.5 - 477.7China (ShanXi) L. sp. (8530)
Tremadoc486.5 - 477.7Canada (Newfoundland and Labrador) L. sp. (78091)
Tremadoc486.5 - 477.7USA (Vermont) L. puteatum (192760)
Tremadoc486.5 - 477.7Canada (Alberta) L. ceratopygoides (10962 10985 10987 10989 10990 10991 10992 10994 10995)
Tremadoc486.5 - 477.7Bolivia L. sp. (8837)
Tremadoc486.5 - 477.7Canada (Northwest Territories) L. manitouensis, Perischodory incompertum (192761)
Tremadoc486.5 - 477.7China (JiLin) L. sp. (21144 21145)
Tremadoc486.5 - 477.7China (HeBei) L. sp. (7964)
Tremadoc486.5 - 477.7Argentina L. sp. (8867 9008)
Demingian485.4 - 478.6USA (New Mexico) Lloydia manitouensis (56479)
Demingian485.4 - 478.6Canada (Alberta) L. glabrum (50166)
Demingian485.4 - 478.6Canada (Newfoundland) L. proprium (195754) L. sp. (196501)
Demingian485.4 - 478.6USA (Montana) Lloydia manitouensis (284 69027) Lloydia manitouensis, Lloydia incomperta (69026)
Demingian485.4 - 478.6USA (Idaho) L. manitouense (103810)
Stairsian485.4 - 478.6Norway (Spitsbergen) L. spongiosum (189833)
Stairsian485.4 - 478.6USA (Nevada) L. goodwinensis (278 104511) L. sp. (104503)
Stairsian485.4 - 478.6USA (Utah) L. manitouense (103892) L. manitouensis (104066)
Gasconadian485.4 - 477.7USA (Nevada) L. sp. (104650)
Gasconadian485.4 - 477.7USA (Texas) L. sp. (271)
Tremadocian485.4 - 477.7Canada (Northwest Territories) L. manitouensis (25754)
Jeffersonian485.4 - 470.0Canada (Newfoundland) L. sp. (195774)
Stairsian - Whiterockian485.4 - 457.3USA (Nevada) L. mudgei (281)
Lancefieldian484.3 - 474.9Australia (Victoria) L. manitouensis (165725)
Tulean480.8 - 474.9USA (Nevada) L. sp. (104343)
Tulean480.8 - 474.9USA (Idaho) L. sp. (228266)
Arenig478.6 - 466.0China (GanSu) L. sp. (8568)
Arenig478.6 - 466.0Argentina L. sp. (8721)