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Xenocheilos spineum

Trilobita - Nepeidae

Taxonomy
Xenocheilos spineum was named by Wilson (1951) [non Xenocheilos spineum; Wilson 1951 pl. 95, figs 17 [Xenocheilos sp. indet.] non Xenocheilos spineum; Deland & Shaw 1956, p. 560, pl. 65, figs 4, 6, 13 [= Xenocheilos sp. indet.]. non Xenocheilos spineum; Kurtz 1975, p. 1033, pl. 4, figs 27-29 [fig. 27 = Xenocheilos sp. indet.; fig. 28 = gen indet.; fig. 29 = Cliffia sp.].]. Its type specimen is YPM 18509, a cephalon/head (cranidium), and it is a 3D body fossil.

Sister species lacking formal opinion data
X. granulosus, X. minimum, X. orthos

Synonymy list
YearName and author
1951Xenocheilos spineum Wilson p. 649 figs. pl. 95, figs 15-16
2009Xenocheilos spineum Westrop and Adrain p. 364 figs. 5A-D

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Ecdysozoa
—Panarthropoda
RankNameAuthor
phylumArthropodaLatreille 1829
subphylumArtiopoda(Hou and Bergstrom)
classTrilobitaWalch 1771
familyNepeidaeWhitehouse 1939
genusXenocheilosWilson 1949
speciesspineumWilson 1951

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.

†Xenocheilos spineum Wilson 1951
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Diagnosis
No diagnoses are available