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Shumardia ctenata

Trilobita - Ptychopariida - Shumardiidae

Taxonomy
Shumardia ctenata was named by Robison and Pantoja-Alor (1968). Its type specimen is USNM 158936, a pygidium, and it is not a trace fossil. Its type locality is USNM 16002g, Tinu Formation, Oaxaca, Mexico - Robison and Pantoja-Alor 1968, which is in the Tremadoc of limestone/shale the Tinu Formation Mexico.

Sister species lacking formal opinion data
S. pentagonalis

Synonymy list
YearName and author
1968Shumardia ctenata Robison and Pantoja-Alor p. 797

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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
speciesctenata

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 ctenata Robison and Pantoja-Alor 1968
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Diagnosis
No diagnoses are available