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Montezumaspis cometes

Trilobita - Redlichiida - Holmiidae

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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EubilateriaAx 1987
phylumArthropodaLatreille 1829
classTrilobitaWalch 1771
orderRedlichiidaRichter 1932
familyHolmiidaeHupé 1953

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.

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
No measurements are available
Composition: low Mg calcitec
Composition 2: chitinc
Ontogeny: molting, addition of partsc
Environment: marinec
Locomotion: fast-movingo
Life habit: low-level epifaunalo
Diet: deposit feedero
Vision: well-developedf
Created: 2009-12-21 06:03:46
Modified: 2009-12-21 08:03:46
Source: f = family, o = order, c = class
References: Whittington et al. 1997, Aberhan et al. 2004, Hendy et al. 2009

Age range: Montezuman or 530.00000 to 516.00000 Ma

Collections (18 total)

Time interval Ma Country or state Original ID and collection number
Montezuman530.0 - 516.0USA (Nevada) Esmeraldina cometes (10555 type locality: 69466) Montezumaspis cometes (140498 140499 140502 140504 140505 140506 140508 140509 140510 140515 140516 140517 140518 140555 140556)
Waucoban530.0 - 513.0USA (California) Fallotaspis sp. (263)