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Shumardia extensa

Trilobita - Ptychopariida - Shumardiidae

Taxonomy
Shumardia extensa was named by Weir (1959). Its type specimen is BMNH 53383, a cephalon/head, and it is a 3D body fossil. Its type locality is Stream on south-eastern boundary of Ballyvorgal South, Slieve Bemagh Mountains, which is in a Katian marine mudstone in Ireland.

It was recombined as Shumardia (Shumardoella) extensa by Hammann and Leone (1997).

Sister species lacking formal opinion data
S. pentagonalis

Synonymy list
YearName and author
1959Shumardia extensa Weir pp. 374 - 375 figs. Plate 63, figs. 5, 6
1997Shumardia (Shumardoella) extensa Hammann and Leone p. 44 figs. pl. 4, figs 1–8.
2011Shumardia extensa Ghobadi Pour et al. pp. 163 - 165 fig. 4a–h

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Ecdysozoa
—Panarthropoda
phylumArthropodaLatreille 1829
RankNameAuthor
subphylumArtiopoda(Hou and Bergstrom)
classTrilobitaWalch 1771
subclassLibristoma
orderPtychopariidaSwinnerton 1915
familyShumardiidaeLake 1907
genusShumardiaBillings 1862
speciesextensa

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.

†Shumardia extensa Weir 1959
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Diagnosis
ReferenceDiagnosis
J. A. Weir 1959Shumardia with isolated basal lateral glabellar lobes; glabella overhanging anterior margin. Posterior cephalic border furrows broad (sag.).
Measurements
No measurements are available
Composition: low Mg calcitec
Composition 2: chitinc
Ontogeny: molting, addition of partsc
Environment: marinec
Locomotion: fast-movingc
Life habit: low-level epifaunalc
Diet: carnivorec
Vision: blindf
Created: 2009-12-19 04:33:59
Modified: 2009-12-19 06:33:59
Source: f = family, c = class
References: Whittington et al. 1997, Aberhan et al. 2004

Age range: base of the Sandbian to the top of the Kralodvorian or 458.40000 to 445.20000 Ma

Collections (4 total)


Time interval Ma Country or state Original ID and collection number
Sandbian458.4 - 453.0Kazakhstan Shumardia extensa (162194 162196)
Katian453.0 - 445.2Ireland Shumardia extensa (type locality: 162246)
Kralodvorian449.8 - 445.2Italy (Sardinia) Shumardia extensa (192914)