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Montezumaspis cometes

Trilobita - Redlichiida - Holmiidae

Taxonomy
Esmeraldina cometes was named by Fritz (1995). Its type specimen is USNM 479804, a cephalon/head, and it is a mold. Its type locality is UNSM "Green" Locality 1f, which is in a Montezuman marine siltstone in the Campito Formation of Nevada.

It was recombined as Palmettaspis cometes by Lieberman (1999); it was recombined as Montezumaspis cometes by Hollingsworth (2006).

Synonymy list
YearName and author
1995Esmeraldina cometes Fritz p. 716 figs. figs. 5.3, 9.8, 10.3–10.5
1999Palmettaspis cometes Lieberman p. 85
2006Montezumaspis cometes Hollingsworth p. 317 figs. Figures 7.1, 8.1–8.10

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Ecdysozoa
Panarthropoda
phylumArthropodaLatreille 1829
subphylumArtiopoda(Hou and Bergstrom)
RankNameAuthor
classTrilobitaWalch 1771
orderRedlichiidaRichter 1932
suborderOlenellina
superfamilyOlenelloidea
familyHolmiidaeHupé 1953
genusMontezumaspis
speciescometes()

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.

Montezumaspis cometes Fritz 1995
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Diagnosis
ReferenceDiagnosis
W. H. Fritz 1995Esmeraldina*? with a relatively narrow, parallel- sided glabella, transverse posterior margin, and long genal spines.
J. S. Hollingsworth 2006Preglabellar field equal to sagittal length of anterior border on small specimens ranging to virtually absent on large specimens. Glabella slightly narrowed at S2. LA broadly rounded anteriorly and slightly wider (tr.) than L0. Ocular lobes semicircular. Occipital spine arises at posterior margin of L0. Ax- ial rings of thorax have nodes or small spines. Lateral margins of pleural spines outward-directed, about 45