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Elburgia granulosa

Trilobita - Ptychopariida - Elviniidae

Taxonomy
Crepicephalus (Loganellus) granulosus was named by Hall and Whitfield (1877). Its type specimen is USNM 24573 and is a 3D body fossil.

It was recombined as Ptychoparia granulosus by Walcott (1884); it was recombined as Inouyia granulosa by Walcott (1916); it was recombined as Dunderbergia granulosa by Resser (1935); it was recombined as Elburgia granulosa by Palmer (1965).

Sister species lacking formal opinion data
E. disgranosa

Synonymy list
YearName and author
1877Crepicephalus (Loganellus) granulosus Hall and Whitfield p. 214 figs. pi. 2, figs. 2, 3
1884Ptychoparia granulosus Walcott p. 57
1916Inouyia granulosa Walcott p. 204
1935Dunderbergia granulosa Resser p. 24
1965Elburgia granulosa Palmer pp. 42 - 43 figs. Pl. 5 f. 14, 16-19

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—EcdysozoaAguinaldo et al. 1997
—Panarthropoda
phylumArthropodaLatreille 1829
RankNameAuthor
subphylumArtiopoda(Hou and Bergstrom)
classTrilobitaWalch 1771
subclassLibristoma
orderPtychopariidaSwinnerton 1915
familyElviniidaeKobayashi 1936
genusElburgia
speciesgranulosa(Hall and Whitfield 1877)

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.

†Elburgia granulosa Hall and Whitfield 1877
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Diagnosis
ReferenceDiagnosis
A. R. Palmer 1965External surface of cranidium, exclusive of furrows and palpebral lobes, covered with coarse granules. Intergranular distance about equal to or greater than granule diameter.

Ocular platform on free cheek has granular ornamentation as on cranidium. Lateral border, exclusive of genal spine, has more concentrated granules. Genal spine has scattered coarse pits.

Pygidium has granules on tops of axial segments, pleural ribs, and border. Granules closely-packed on border and at end of axis.

Surfaces of molds of most parts have mixture of scattered coarse granules and pits.
Measurements
No measurements are available
Composition: low Mg calcitec
Composition 2: chitinc
Entire body: yesf
Adult length: 10 to < 100f
Adult width: 10 to < 100f
Ontogeny: molting, addition of partsc
Environment: marinec
Locomotion: fast-movingc
Life habit: low-level epifaunalc
Diet: carnivorec
Vision: well-developedf
Created: 2009-06-11 14:51:19
Modified: 2009-12-19 06:03:31
Source: f = family, c = class
References: Aberhan et al. 2004, Hendy 2009

Age range: Steptoean or 497.00000 to 493.50000 Ma

Collections (8 total)


Time interval Ma Country or state Original ID and collection number
Steptoean497.0 - 493.5USA (Nevada and Utah) Elburgia granulosa (74910)
Steptoean497.0 - 493.5USA (Nevada) Elburgia granulosa (110446 110623 110625 111325)
Furongian497.0 - 486.85USA (Utah) Elburgia granulosa (156393 156394 156447)