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Spencia quadrata

Trilobita - Ptychopariida - Ptychopariidae

Taxonomy
Spencia quadrata was named by Fritz (1968). Its type specimen is USNM 153610, a cephalon/head (cranidium), and it is a 3D body fossil. Its type locality is Pioche Shale, Bed 11, which is in a Delamaran carbonate shale/limestone in the Pioche Shale Formation of Nevada.

Synonymy list
YearName and author
1968Spencia quadrata Fritz p. 232 figs. Pl. 40, figs.27-29

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Ecdysozoa
—Panarthropoda
phylumArthropodaLatreille 1829
RankNameAuthor
subphylumArtiopoda(Hou and Bergstrom)
classTrilobitaWalch 1771
subclassLibristoma
orderPtychopariidaSwinnerton 1915
familyPtychopariidaeMatthew 1887
genusSpencia
speciesquadrata

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.

†Spencia quadrata Fritz 1968
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Diagnosis
No diagnoses are available