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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

View classification of included taxa

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
subphylumMandibulata
classTrilobitaWalch 1771
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.

Diagnosis
ReferenceDiagnosis
J. A. Weir 1959Shumardia with isolated basal lateral glabellar lobes; glabella overhanging anterior margin. Posterior cephalic border furrows broad (sag.).