Middle Cambrian arthropods from Utah

Briggs, Derek E. G.; Lieberman, Bruce S.; Hendricks, Jonathan R.; Halgedahl, Susan L.; Jarrard, Richard D.

doi:10.1666/06-086.1

Cited by 107 publications

(152 citation statements)

References 63 publications

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“…KUMIP 314086a/b (Fig. 5.1, 5.2) was first described by Briggs et al (2008, fig. 2.2) as a radiodontan appendage.…”

Section: Sidneyia? From the Spence Shale Member-conwaymentioning

confidence: 99%

“…There have been a substantial number of relatively recent sedimentological, taphonomic, and geochemical studies of the soft-bodied biota from this formation and region (e.g., Gaines andDroser, 2003, 2005;Briggs et al, 2008;Halgedahl et al, 2009;Gaines, 2014). The unit consists of homogeneous mudstones and interbedded mudstones with thin-grained, fine-bedded limestones.…”

Section: Geologic Settingmentioning

confidence: 99%

“…KUMIP 314078 (Fig. 5.8, 5.9), first described by Briggs et al (2008, fig. 2.2), is an oral cone with four large plates, and seven smaller plates between each larger plate.…”

Section: Sidneyia? From the Spence Shale Member-conwaymentioning

confidence: 99%

“…1d-i, S4a-c;1l, S3c,d, S4f). Notably, the soft-bodied biotas from the middle Cambrian (Series 3) of Utah have yielded a large number of specimens previously identified as radiodontans in general, and 4 usually Anomalocaris Whiteaves, 1892or Peytoia Walcott, 1911(Daley and Bergström, 2012 (e.g., Conway Morris and Robison, 1982;Briggs and Robison, 1984;Conway Morris and Robison, 1988;Robison, 1991;Briggs et al, 2008), but the systematic position of most of this material has not yet been re-evaluated in light of the new discoveries on Hurdia. By analysis of appendages and mouthparts originally described in Conway Morris and Robison (1988) Daley et al (2013a) were able to conclude that Hurdia was in fact present in the middle Cambrian (Series 3) of Utah alongside Peytoia, and described four new specimens from the Spence Shale.…”

Section: Introductionmentioning

confidence: 99%

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Hurdiid radiodontans from the middle Cambrian (Series 3) of Utah

Pates¹,

Daley

Lieberman

2017

J. Paleontol.

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“…KUMIP 314086a/b (Fig. 5.1, 5.2) was first described by Briggs et al (2008, fig. 2.2) as a radiodontan appendage.…”

Section: Sidneyia? From the Spence Shale Member-conwaymentioning

confidence: 99%

Section: Geologic Settingmentioning

confidence: 99%

“…KUMIP 314078 (Fig. 5.8, 5.9), first described by Briggs et al (2008, fig. 2.2), is an oral cone with four large plates, and seven smaller plates between each larger plate.…”

Section: Sidneyia? From the Spence Shale Member-conwaymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hurdiid radiodontans from the middle Cambrian (Series 3) of Utah

Pates¹,

Daley

Lieberman

2017

J. Paleontol.

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“…Remarks.-This new taxon is similar to Dicranocaris (Briggs et al, 2008). Phylogenetic relationships of Cambrian arthropods are not fully resolved but Dicranocaris appears to be a megacheiran (Ortega-Hernández et al, 2013; see also Hendricks and Lieberman, 2008 Etymology.-Refers to the proposed link (Greek, desmos, bond or chain) to other Cambrian megacheirans.…”

Section: Phylum Arthropoda Von Siebold 1848mentioning

confidence: 95%

New records of Burgess Shale-type taxa from the middle Cambrian of Utah

Morris

Selden

Gunther³

et al. 2015

J. Paleontol.

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Abstract.-Cambrian strata of the Laurentian craton contain numerous examples of Burgess Shale-type faunas. Although displaying a more or less concentric distribution around the cratonal margin, most faunal occurrences are in present-day western North America, extending from the Northwest Territories to California. Nevertheless, the soft-bodied and lightly skeletalized fossils in most of these Lagerstätten are highly sporadic. Here, we extend knowledge of such Middle Cambrian occurrences in Utah with reports of four taxa. An arthropod from the Marjum Formation, Dytikosicula desmatae gen. et sp. nov., is a putative megacheiran. It is most similar to Dicranocaris guntherorum, best known from the younger Wheeler Formation, but differs primarily in the arrangement of pleurae and overall size. Along with a specimen of ?Yohoia sp, a new species of Yohoia, Y. utahana sp. nov., is described. It differs from the type and only known species, Y. tenuis, principally in its larger size and shorter exopods; it is the first description of this genus from outside the Burgess Shale. A new species of a stem-group lophotrochozoan from the Spence Shale, Wiwaxia herka sp. nov., possesses a palisade of dorso-lateral spines that are more robust and numerous than the type species of Wiwaxia, W. corrugata. Another notable taxon is Eldonia ludwigi from the Marjum Formation, which is interpreted as a primitive ambulacrarian (assigned to the cambroernids) and a new specimen of the ?cnidarian Cambrorhytium from the Wheeler Shale is illustrated.

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Caryosyntrips: a radiodontan from the Cambrian of Spain, USA and Canada

Pates

Daley

2017

Papers in Palaeontology

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Caryosyntrips appendages have previously been reported from the Burgess Shale (Cambrian, Stage 5), British Columbia, Canada. New specimens of the genus are here reported from the Wheeler Formation (Cambrian, Drumian) and Langston Formation, Spence Shale Member (Cambrian, Stage 5), Utah, USA. The original Burgess Shale specimens are re-examined alongside the new specimens. Caryosyntrips is shown to have paired ventral spines on each podomere. Three species of Caryosyntrips are recognized: C. serratus Daley & Budd, C. camurus sp. nov. and C. durus sp. nov., differentiated by the overall shape of their appendages and arrangement of dorsal and ventral spines. These differences have potential implications for the feeding methods employed by different species of Caryosyntrips. A specimen collected from the upper Valdemiedes Formation of Spain (Cambrian, Stage 4), previously described as the lobopodian Mureropodia apae G amez Vintaned et al., is reinterpreted as a Caryosyntrips appendage. This identification is supported by the overall shape of the fossil, and the presence, orientation and length:width ratio of ventral spines. However the dorsal surface of the appendage is not well preserved, and the appendage and its ventral spines are larger than those of other known Caryosyntrips. Therefore it is left in open nomenclature as C. cf. camurus. These new finds increase the temporal range of Caryosyntrips (Cambrian Series 2, Stage 4 to Series 3, Drumian) and the geographical range to a new continent: Gondwana.

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Middle Cambrian arthropods from Utah

Cited by 107 publications

References 63 publications

Hurdiid radiodontans from the middle Cambrian (Series 3) of Utah

Hurdiid radiodontans from the middle Cambrian (Series 3) of Utah

New records of Burgess Shale-type taxa from the middle Cambrian of Utah

Caryosyntrips: a radiodontan from the Cambrian of Spain, USA and Canada

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