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Kawina mercurius

Trilobita - Phacopida - Cheiruridae

Taxonomy
Cheirurus mercurius was named by Billings (1865). Its type specimen is GSC 668, a cephalon/head (cranidium), and it is a 3D body fossil.

It was recombined as Cydonocephalus mercurius by Whittington (1963); it was recombined as Kawina mercurius by Congreve and Lieberman (2011).

Synonymy list
YearName and author
1865Cheirurus mercurius Billings p. 285 fig. 272
1963Cydonocephalus mercurius Whittington pp. 102 - 103 figs. Plate 30, figures 11-13, 19, 20
2011Kawina mercurius Congreve and Lieberman pp. Table S1

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Ecdysozoa
Panarthropoda
phylumArthropodaLatreille 1829
RankNameAuthor
subphylumMandibulata
classTrilobitaWalch 1771
orderPhacopidaSalter 1864
suborderCheirurinaHarrington and Leanza 1957
familyCheiruridaeHawle and Corda 1847
genusKawinaBarton 1916
speciesmercurius(Billings 1865)

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
E. Billings 1865Glabella obtusely conical, convex, front half tumid, sides straight or gently convex, sub-parallel, front broadly rounded. Neck furrow extending all across j posterior pair of gla.bellar furrows nearly straight and 8uIJ.paraJlel with the neck furrow, extending all across, but the middle third not 80 deeply indented; the two anterior pairs are short and obscurely marked.

The eye appears to be small, close to the side of the glabella, and just opposite the end of the posterior glabcllar furrow. The cheeks seem to have the form. of C. vulcanus

Associated with this species are some specimens only differing by having the last pair of glabellar flirrows not connected in the middle.