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Pseudomera

Trilobita - Phacopida - Pliomeridae

Taxonomy
Pseudomera was named by Holliday (1942) [Sepkoski's age data: O Trem-l O Llvi-l Sepkoski's reference number: 382,618].

It was assigned to Pliomeridae by Holliday (1942), Fortey and Droser (1999) and Jell and Adrain (2002); and to Phacopida by Sepkoski (2002).

Synonymy list
YearName and author
1942Pseudomera Holliday p. 473
1999Pseudomera Fortey and Droser p. 197
2002Pseudomera Jell and Adrain p. 434
2002Pseudomera Sepkoski

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Ecdysozoa
—Panarthropoda
phylumArthropodaLatreille 1829
RankNameAuthor
subphylumArtiopoda(Hou and Bergstrom)
classTrilobitaWalch 1771
orderPhacopidaSalter 1864
suborderCheirurinaHarrington and Leanza 1957
familyPliomeridaeRaymond 1913
genusPseudomera

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.

G. †Pseudomera Holliday 1942
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†Pseudomera arachnopyge Fortey and Droser 1996
†Pseudomera barrandei Billings 1865
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Invalid names: Pliomerops nevadensis Walcott 1884 [synonym]
†Pseudomera billingsi Whittington 1961
†Pseudomera insolita Poulsen 1927
†Pseudomera nevadensis Walcott 1884
Diagnosis
ReferenceDiagnosis
S. Holliday 1942Pliomeridae with fixed cheeks essentially "L" shaped, nuchal furrow terminating before it reaches the genal angle. Median indentation in frontal glabelar lobe.
Measurements
No measurements are available
Composition: low Mg calcitec
Composition 2: chitinc
Entire body: yesg
Adult length: 10 to < 100g
Adult width: 10 to < 100g
Spines: minorg
Ontogeny: molting, addition of partsc
Environment: marinec
Locomotion: fast-movingc
Life habit: low-level epifaunalc
Diet: carnivorec
Vision: well-developedf
Comments: BODY SIZE: Data from Harrington et al. (1959).g
Created: 2009-06-10 07:59:54
Modified: 2009-06-10 09:59:54
Source: g = genus, f = family, c = class
References: Hendy 2009, Aberhan et al. 2004

Age range: base of the Fennian to the top of the Arenig or 470.70000 to 466.00000 Ma

Collections (90 total)


Time interval Ma Country or state Original ID and collection number
Ibexian487.5 - 470.0Canada (Quebec) P. billingsi (111459)
Early/Lower Ordovician485.4 - 470.0USA (Utah) P. insolita (77845)
Tremadocian - Dapingian485.4 - 467.3Russian Federation (Krasnoyar) P. sp. 1, P. sp. 2 (131154)
Arenig478.6 - 466.0Russian Federation (Siberia) P. sp. (9286)
Arenigian - Llanvirn478.6 - 458.4Canada (Northwest Territories) P. sp. (25283)
Blackhillsian474.9 - 470.0USA (Utah) Pliomerops insolita (104266) Pliomerops insolita, P. insolita (104262) P. insolita (63846 63848 63926 63927 63931) P. sp. (63932)
Blackhillsian474.9 - 470.0USA (Nevada) P. sp. (104431 104552)
Fennian470.7 - 468.0USA (Nevada) P. sp. (80076)
Rangerian470.0 - 470.3USA (Nevada) P. arachnopyge (104653) P. barrandei (104448 104461) P. barrandei, P. nevadensis (119435) P. sp. (297 104453 104655)
Rangerian470.0 - 470.3USA (Utah) P. arachnopyge (37454 37458 37460 37462 37475) P. sp. (104189)
Dapingian470.0 - 467.3USA (Utah) P. barrandei (104200 104218) P. sp. (104199)
Middle Ordovician470.0 - 458.4USA (California) P. sp. (226919 226921)
Chazyan470.0 - 457.3Canada (Newfoundland and Labrador) P. barrandei (104800 104805 104807 104861)
Whiterockian470.0 - 457.3Canada (Northwest Territories) P. barrandei (102233 102259 102262 102263 102264 102267)
Whiterockian470.0 - 457.3USA (California) P. barrandei (119483 119487 208573) P. sp. (104322)
Whiterockian470.0 - 457.3USA (Utah) P. sp. (104064)
Whiterockian470.0 - 457.3USA (Nevada) P. barrandei (104445 104446) P. sp. (301 80073 80081 104309 104314 104374 104449 104451 104455)
Whiterockian470.0 - 457.3Canada (Newfoundland and Labrador) P. barrandei (104863 104867 104874 104876 104877 104878 104879 104880 104881 104883 104884 104885 104886 104887 104888) P. billingsi (104752)
Whiterockian470.0 - 457.3Canada (Newfoundland) P. barrandei (196399 196401)
Whiterockian470.0 - 457.3USA (Oklahoma) P. barrandei (105616 105621 105640 105641 105651 105653) Pseudomera indet. (105626) P. sp. (105629 105632)
Llanvirn468.0 - 458.4Canada (Newfoundland and Labrador) P. barrandei (78097)
Darriwilian467.3 - 458.4Canada (Newfoundland) Pliomerops barrandei (192823)
Darriwilian467.3 - 458.4USA (Nevada) P. sp. (226922)