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Статті в журналах з теми "Burgess, Schiste de (Canada)"

Автор: Grafiati

Опубліковано: 25 липня 2024

Оновлено: 31 липня 2025

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1

Conway Morris, Simon, and John S. Peel. "A new helcionelloid mollusk from the middle Cambrian Burgess Shale, Canada." Journal of Paleontology 87, no. 6 (2013): 1067–70. http://dx.doi.org/10.1666/13-050.

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Burgess Shale-type faunas provide unique insights into the Cambrian “explosion”. Their degree of representativeness of Cambrian marine life in general is, however, less easy to establish. One line of evidence is to consider only the skeletal component of a Burgess Shale-type fauna and compare that with a typical Cambrian assemblage. This paper describes a new species of helcionelloid mollusk (Totoralia reticulata n. sp.) from the middle Cambrian Burgess Shale of British Columbia. Whilst much rarer than the co-occurring smooth shelled helcionelloid Scenella amii, the strongly costate morphology

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2

DALEY, ALLISON C., and GRAHAM E. BUDD. "New anomalocaridid appendages from the Burgess Shale, Canada." Palaeontology 53, no. 4 (2010): 721–38. http://dx.doi.org/10.1111/j.1475-4983.2010.00955.x.

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3

Sprinkle, James, and Desmond Collins. "New eocrinoids from the Burgess Shale, southern British Columbia, Canada, and the Spence Shale, northern Utah, USA." Canadian Journal of Earth Sciences 43, no. 3 (2006): 303–22. http://dx.doi.org/10.1139/e05-107.

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The family Lyracystidae n.fam. and genus Lyracystis n.gen. are proposed for the holotype and one paratype of the Middle Cambrian eocrinoid Gogia? radiata Sprinkle, the Burgess Shale "Arms" from the same unit, and many additional partial and more complete specimens of this eocrinoid collected from the Burgess Shale since 1975. A second species, Lyracystis reesei n.gen. and n.sp. is described from a single partly complete specimen from the similar-aged Spence Shale of northern Utah. Lyracystis has three wide V-shaped arms bearing numerous long straight brachioles in the notch, a partly organized

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4

Sun, Zhixin, Han Zeng, and Fangchen Zhao. "First occurrence of the Cambrian arthropod Sidneyia Walcott, 1911 outside of Laurentia." Geological Magazine 157, no. 3 (2019): 405–10. http://dx.doi.org/10.1017/s0016756819000864.

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AbstractThe arthropod Sidneyia Walcott, 1911 is a remarkable animal of the Burgess Shale biota (Cambrian Miaolingian, Wuliuan; British Columbia, Canada), which has not been confidently reported from other Cambrian Konservat-Lagerstätten. Here we report the discovery of Sidneyia cf. inexpectans from the Wuliuan Mantou Formation of North China, which substantially expands the known palaeogeographical distribution of this genus. Our discovery suggests that Sidneyia had much greater dispersal ability than hitherto thought. It also confirms the presence of exceptionally preserved fossils in the Wul

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5

Petrie, Meredith Blair, Jane A. Gilotti, William C. McClelland, Cees Van Staal, and Sierra J. Isard. "Geologic Setting of Eclogite-facies Assemblages in the St. Cyr Klippe, Yukon–Tanana Terrane, Yukon, Canada." Geoscience Canada 42, no. 3 (2015): 327. http://dx.doi.org/10.12789/geocanj.2015.42.073.

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The St. Cyr area near Quiet Lake hosts well preserved to variably retrogressed eclogite found as sub-metre to hundreds of metre-long lenses within quartzofeldspathic schist in south-central Yukon, Canada. The St. Cyr klippe consists of structurally imbricated, polydeformed and polymetamorphosed units of continental arc crust and ultramafic–mafic rocks. Eclogite-bearing quartzofeldspathic schist forms thrust slices in a 30 km long by 6 km wide, northwest-striking outcrop belt. The schist unit comprises metasedimentary and felsic intrusive rocks that are intercalated on the metre to tens of metr

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6

Minter, Nicholas J., M. Gabriela Mángano, and Jean-Bernard Caron. "Skimming the surface with Burgess Shale arthropod locomotion." Proceedings of the Royal Society B: Biological Sciences 279, no. 1733 (2011): 1613–20. http://dx.doi.org/10.1098/rspb.2011.1986.

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The first arthropod trackways are described from the Middle Cambrian Burgess Shale Formation of Canada. Trace fossils, including trackways, provide a rich source of biological and ecological information, including direct evidence of behaviour not commonly available from body fossils alone. The discovery of large arthropod trackways is unique for Burgess Shale-type deposits. Trackway dimensions and the requisite number of limbs are matched with the body plan of a tegopeltid arthropod. Tegopelte , one of the rarest Burgess Shale animals, is over twice the size of all other benthic arthropods kno

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7

Ausich, William I., and Loren E. Babcock. "Phylogenetic Affinities of Echmatocrinus Brachiatus (Middle Cambrian Burgess Shale, Canada)." Paleontological Society Special Publications 8 (1996): 16. http://dx.doi.org/10.1017/s2475262200000186.

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8

García-Bellido, Diego C., Jean Vannier, and Desmond Collins. "Soft-part preservation in two species of the arthropod Isoxys from the middle Cambrian Burgess Shale of British Columbia, Canada." Acta Palaeontologica Polonica 54, no. 4 (2009): 699–712. https://doi.org/10.4202/app.2009.0024.

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García-Bellido, Diego C., Vannier, Jean, Collins, Desmond (2009): Soft-part preservation in two species of the arthropod Isoxys from the middle Cambrian Burgess Shale of British Columbia, Canada. Acta Palaeontologica Polonica 54 (4): 699-712, DOI: 10.4202/app.2009.0024, URL: http://dx.doi.org/10.4202/app.2009.0024

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9

Verdun, Amy. "The Federal Features of the EU: Lessons from Canada." Politics and Governance 4, no. 3 (2016): 100–110. http://dx.doi.org/10.17645/pag.v4i3.598.

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There has been a rise and fall in interest in federalism in the context of European integration. This article assesses the federal nature of the EU. It draws in particular on the work of Michael Burgess who has been one of the key thinkers on this issue. Because there are many types of ‘federalisms’ available across the globe, it is helpful to make a comparison with another political system to offer a base line. In this article I explore to what extent the EU already has federal features. With the help of the work of Burgess I seek to look beyond the specific characteristics of the EU and refl

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10

Rigby, J. Keith, Lloyd F. Gunther, and Freida Gunther. "The first occurrence of the Burgess Shale demosponge Hazelia palmata Walcott, 1920, in the Cambrian of Utah." Journal of Paleontology 71, no. 6 (1997): 994–97. http://dx.doi.org/10.1017/s0022336000035976.

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A single specimen of Hazelia palmata Walcott, 1920, was collected from the Middle Cambrian Marjum Formation near Marjum Pass, in the central House Range, western Utah. This is a first occurrence of the species outside the Burgess shale region of British Columbia, Canada. The flattened oval impression of the monaxonid demosponge shows characteristic tufts and spicule structures of the species.

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11

Anderson, Ross P., Nicholas J. Tosca, Erin E. Saupe, Jon Wade, and Derek E. G. Briggs. "Early formation and taphonomic significance of kaolinite associated with Burgess Shale fossils." Geology 49, no. 4 (2020): 355–59. http://dx.doi.org/10.1130/g48067.1.

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Abstract The role of minerals in Burgess Shale–type fossilization is controversial, particularly that of the clay mineral kaolinite. Kaolinite may have formed on carcasses or attached to them as they decayed, stabilizing organic matter. Alternatively, kaolinite may have formed during metamorphism, playing no role in the preservation of soft tissues. Evaluating the formation and taphonomic role of kaolinite is difficult, because the mineralogy of Burgess Shale–type fossils is incompletely known. We used in situ selected-area X-ray diffraction to constrain the mineralogy of fossils from the clas

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12

Kimmig, Julien, and Brian R. Pratt. "Soft-bodied biota from the middle Cambrian (Drumian) Rockslide Formation, Mackenzie Mountains, northwestern Canada." Journal of Paleontology 89, no. 1 (2015): 51–71. http://dx.doi.org/10.1017/jpa.2014.5.

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AbstractA new Burgess Shale-type Lagerstätte is described from the middle Cambrian (Series 3, Drumian) Rockslide Formation of the Mackenzie Mountains, Northwest Territories, Canada. The Rockslide Formation is a unit of deeper water ramp to slope, mixed carbonate, and siliciclastic facies deposited on the northwestern margin of Laurentia. At the fossil-bearing locality, the unit onlaps a fault scarp cutting lower Cambrian sandstones. There it consists of a succession of shale and thick-laminated to thin-bedded lime mudstone, calcareous sandstone, and greenish-colored calcareous mudstone, overla

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13

Sumrall, Colin D., and Samuel Zamora. "A columnal-bearing eocrinoid from the Cambrian Burgess Shale (British Columbia, Canada)." Journal of Paleontology 89, no. 2 (2015): 366–68. http://dx.doi.org/10.1017/jpa.2014.54.

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AbstractA new eocrinoid ?Ubaghsicystis sp. from the middle Cambrian (Series 3, Stage 5) Burgess Shale is reported based on a single known specimen. This species extends the stratigraphic range of columnal-bearing eocrinoids in Laurentia significantly from Cambrian Stage 7 (Guzhangian) to Stage 5. It increases the diversity of echinoderms in this well-known fossil-Lagerstätte, provides the oldest evidence of columnal-bearing eocrinoids from Laurentia, and further documents the cosmopolitan distribution of middle Cambrian echinoderm clades.

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14

Mankiewicz, Carol. "Obruchevella and other microfossils in the Burgess Shale: preservation and affinity." Journal of Paleontology 66, no. 5 (1992): 717–29. http://dx.doi.org/10.1017/s0022336000020758.

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Charles D. Walcott's thin sections of the Middle Cambrian Burgess Shale of British Columbia, Canada, have yielded many specimens of the helically coiled microfossil Obruchevella delicata, as well as fragments of the cyanobacteria Marpolia and Morania, sphaeromorph acritarchs, and sclerites of the enigmatic metazoan Wiwaxia. Obruchevella of the Burgess Shale displays a spectrum of preservation styles ranging from tangled masses to well-developed helixes. All Obruchevella specimens are preserved in three dimensions, which suggests original skeletalization or early post-mortem mineralization of t

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15

Legg, David A., and Jean-Bernard Caron. "New Middle Cambrian bivalved arthropods from the Burgess Shale (British Columbia, Canada)." Palaeontology 57, no. 4 (2013): 691–711. http://dx.doi.org/10.1111/pala.12081.

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16

Culliney, Thomas W. "PREDATION ON ADULT PHYLLOTRETA FLEA BEETLES BY PODISUS MACULIVENTRIS (HEMIPTERA: PENTATOMIDAE) AND NABICULA AMERICOLIMBATA (HEMIPTERA: NABIDAE)." Canadian Entomologist 118, no. 7 (1986): 731–32. http://dx.doi.org/10.4039/ent118731-7.

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On three occasions in late August 1985, during the course of a study of the arthropod community associated with collards (Brassica oleracea var. acephala) (Cruciferae) in central New York State, two species of predaceous Heteroptera, the spined soldier bug, Podisus maculiventris (Say), and Nabicula americolimbata (Carayon), were observed feeding on adult flea beetles of the genus Phyllotreta. Evidence for predation on adult flea beetles is rare. Tahvanainen and Root (1972) and Kareiva (1985) reported practically no predation on adult Phyllotreta cruciferae (Goeze) in central New York, but scat

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17

García-Bellido, Diego C., and Desmond H. Collins. "A new study of Marrella splendens (Arthropoda, Marrellomorpha) from the Middle Cambrian Burgess Shale, British Columbia, Canada." Canadian Journal of Earth Sciences 43, no. 6 (2006): 721–42. http://dx.doi.org/10.1139/e06-012.

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Study of over 1000 specimens of Marrella splendens Walcott, 1912, out of the more than 9000 collected by the Royal Ontario Museum (ROM) since 1975, has produced new information on the anatomy, functional morphology, and behaviour of this most common arthropod in the Burgess Shale fauna. Among the new features recognized is the distinction between the alimentary canal and circulatory system; where the former is generally three-dimensional and slightly reflective, the latter never presents any relief and is very reflective. A larger range of size is now known, from 2.4 to 24.5 mm in length, with

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18

Montero, Ángel, Carmen Diéguez, and Diego García-Bellido. "Ejemplares de la Phyllopod Bed-Burgess Shale (Cámbrico Medio) en el Museo Nacional de Ciencias Naturales-CSIC (Madrid, Espana)." Spanish Journal of Palaeontology 13, no. 3 (2022): 143. http://dx.doi.org/10.7203/sjp.23987.

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A collection of fossil invertebrates from well-known North American sites is hosted at the Museo Nacional de Ciencias Naturales-CSIC (MNCN-CSIC) of Madrid. This collection was a result of an exchange between this Institution and the Smithsonian Institution of Washington in the sixties of this century. In this collection there are eigth items from the Walcott's Quarry site of the Burgess Shale (British Columbia, Canada). It consists of twelve specimens included in the Kingdom Monera (one phylum) and Kingdom Animalia (six phyla).

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19

Balakrishnan, T. R., and George K. Jarvis. "Is the Burgess concentric zonal theory of spatial differentiation still applicable to urban Canada?" Canadian Review of Sociology/Revue canadienne de sociologie 28, no. 4 (2008): 526–39. http://dx.doi.org/10.1111/j.1755-618x.1991.tb00168.x.

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20

Pratt, Brian R., and Julien Kimmig. "Extensive bioturbation in a middle Cambrian Burgess Shale–type fossil Lagerstätte in northwestern Canada." Geology 47, no. 3 (2019): 231–34. http://dx.doi.org/10.1130/g45551.1.

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21

O'Brien, Lorna J., and Jean-Bernard Caron. "A New Stalked Filter-Feeder from the Middle Cambrian Burgess Shale, British Columbia, Canada." PLoS ONE 7, no. 1 (2012): e29233. http://dx.doi.org/10.1371/journal.pone.0029233.

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22

Butterfield, Nicholas J. "Burgess Shale-type fossils from a Lower Cambrian shallow-shelf sequence in northwestern Canada." Nature 369, no. 6480 (1994): 477–79. http://dx.doi.org/10.1038/369477a0.

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23

Moysiuk, J., and J. B. Caron. "Burgess Shale fossils shed light on the agnostid problem." Proceedings of the Royal Society B: Biological Sciences 286, no. 1894 (2019): 20182314. http://dx.doi.org/10.1098/rspb.2018.2314.

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Agnostids (agnostinids and eodiscinids) are a widespread and biostratigraphically important group of Cambro-Ordovician euarthropods whose evolutionary affinities have been highly controversial. Their dumbbell-shaped calcified tergum was traditionally suggested to unite them with trilobites, but agnostinids have alternatively been interpreted as stem-crustaceans, based on Orsten larval material from the Cambrian of Sweden. We describe exceptionally preserved soft tissues from mature individuals of the agnostinids Peronopsis and Ptychagnostus from the middle Cambrian (Wuliuan Stage) Burgess Shal

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24

Allison, Peter A., and Carlton E. Brett. "In situ benthos and paleo-oxygenation in the Middle Cambrian Burgess Shale, British Columbia, Canada." Geology 23, no. 12 (1995): 1079. http://dx.doi.org/10.1130/0091-7613(1995)023<1079:isbapo>2.3.co;2.

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25

Vidal, G., and J. S. Peel. "Acritarchs from the Buen Formation (Lower Cambrian), North Greenland." Rapport Grønlands Geologiske Undersøgelse 137 (December 31, 1988): 54. http://dx.doi.org/10.34194/rapggu.v137.8014.

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Siliciclastic sediments of the Buen Formation of North Greenland yield the earliest Cambrian fossils known from North Greenland, with the exception of cyanobacteria described from dolomites of the underlying Portfjeld Formation (see Peel, this report). The fauna is dominated by olenellid and nevadiid trilobites indicating an Early Cambrian age (Poulsen, 1974; Blaker, this report) but hyolithids, bradoriids, sponges and other fossils also occur. Bergstrom & Peel (this report) described trace fossils from the Buen Formation. Of particular interest is the recent discovery of lightly skeletise

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26

Morris, Simon Conway. "A redescription of a rare chordate, Metaspriggina Walcotti Simonetta and Insom, from the Burgess Shale (Middle Cambrian), British Columbia, Canada." Journal of Paleontology 82, no. 2 (2008): 424–30. http://dx.doi.org/10.1666/06-130.1.

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Until Recently, our understanding of the earliest history of the fish has been fragmentary in terms of the fossil record and conjectural with respect to many details of phylogeny. Fortunately, significant new information has become available in recent years, most notably from the discoveries of at least three taxa of agnathan fish from the Lower Cambrian Chengjiang Lagerstätte of Yunnan, China (Shu et al., 1999, 2003; Shu, 2003; see also Hou et al., 2002; Hou et al., 2004, p. 192-193; Zhang and Hou, 2004). Two of the taxa (Haikouichthys and Zhangjianichthys) are represented by numerous specime

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27

Gozalo, Rodolfo, Mª Eugenia Dies-Álvarez, José Antonio Gámez VIintaned, Juan B. Chirivella, and Eladio Liñan. "Presence of Naraoia Walcott, 1912 (Nektaspida, Arthropoda) in the middle Cambrian of Europe (Murero, NE Spain)." Spanish Journal of Palaeontology 33, no. 1 (2018): 83. http://dx.doi.org/10.7203/sjp.33.1.13243.

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The genus Naraoia Walcott, 1912, a Burgess Shale-type fossil known from the lower and middle Cambrian of British Columbia (Canada), Idaho and Utah (USA), as well as from Yunnan and Guizhou provinces (China), is now reported from the middle Cambrian of Murero (Zaragoza, Spain), which is the first record in the Acadobaltic province. The only fragmented specimen found is determined as Naraoia sp., its age being Pardailhania multispinosa Zone (Drumian Stage). This new datum reinforces the hypothesis of the existence of a cosmopolitan faunal substrate in early Cambrian times, which is to some exten

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28

GARCÍA-BELLIDO, DIEGO C., and DESMOND COLLINS. "REASSESSMENT OF THE GENUS LEANCHOILIA (ARTHROPODA, ARACHNOMORPHA) FROM THE MIDDLE CAMBRIAN BURGESS SHALE, BRITISH COLUMBIA, CANADA." Palaeontology 50, no. 3 (2007): 693–709. http://dx.doi.org/10.1111/j.1475-4983.2007.00649.x.

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29

Nedin, Christopher. "Palaeontology and palaeoecology of the Lower Cambrian Emu Bay Shale Lagerstätten, Kangaroo Island, South Australia." Paleontological Society Special Publications 6 (1992): 221. http://dx.doi.org/10.1017/s2475262200007814.

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The last two decades have seen the status of deposits containing soft bodied Cambrian fossils rise from geological curios into one of the foundations of modern thinking on early metazoan evolution and ecology. Some thirty of these soft bodied assemblages or Lagerstätten, resembling the Burgess Shale fauna are now known. One of these is the Lower Cambrian Emu Bay Shale fauna from Kangaroo Island, South Australia.The Emu Bay Shale has been mapped in two localities approx. 8 km (5 miles) apart on the northern coast of Kangaroo Island, at Emu Bay and at Big Gully. Previous investigations into the

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30

Thompson, Cheryl. "Casting Blackface in Canada: Unmasking the History of ‘White and Black’ Minstrel Shows." Canadian Theatre Review 193 (February 1, 2023): 16–20. http://dx.doi.org/10.3138/ctr.193.004.

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Blackface minstrelsy was the dominant form of mass entertainment for over a century, from the 1840s through the 1940s. In Canada, there has been little scholarly research into the topic but for the work of Stephen Johnson and, in recent years, the works I have published on the subject. One of the reasons blackface has been understudied is the dearth of attention paid to histories of slavery. By exploring the history of casting blackface productions, both ‘white’ minstrelsy (white performers blackening up to imitate the song and dance of African-Americans) and ‘Black’ minstrelsy (Black performe

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31

Martell, Gordon A., and Nicole Mercereau. "An Indigenous Self-Declaration Relational Policy Framework." Canadian Journal of Educational Administration and Policy, no. 206 (2025): 94–111. https://doi.org/10.7202/1118736ar.

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Canadian historical records demonstrate the role of schools in diminishing Indigenous identity, either intentionally or as a result of neglect, within dominant western systems (Battiste, 2013; Harper & Thompson, 2017; Henry et al., 2017; Marom, 2019; Pidgeon et al., 2013; St. Denis, 2011). Despite the oppressive effects of institutional racism (Gillies, 2021; Harper & Thompson, 2017; Henry et al., 2017; Marom, 2019; McLean, 2022) and policies that limited the participation and influence of Indigenous people in publicly funded Canadian schools, Indigenous educators have maintained a pre

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32

PATES, STEPHEN, and ALLISON C. DALEY. "The Kinzers Formation (Pennsylvania, USA): the most diverse assemblage of Cambrian Stage 4 radiodonts." Geological Magazine 156, no. 07 (2018): 1233–46. http://dx.doi.org/10.1017/s0016756818000547.

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AbstractRadiodonta, apex Cambrian predators such as Anomalocaris have been known from the Kinzers Formation (Cambrian Series 2, Stage 4 – Pennsylvania, USA) for nearly 100 years. Work over the last ten years, mainly on radiodont material from the Chengjiang (Cambrian Series 2, Stage 3 – Yunnan, China) and Burgess Shale (Miaolingian, Wuliuan – British Columbia, Canada), has greatly improved our knowledge of the diversity and disparity of radiodonts and their frontal appendages, including the description of new species, genera and families. Previous work identified two species of radiodonts from

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33

Zhao, Fangchen, Jean-Bernard Caron, David J. Bottjer, Shixue Hu, Zongjun Yin, and Maoyan Zhu. "Diversity and species abundance patterns of the Early Cambrian (Series 2, Stage 3) Chengjiang Biota from China." Paleobiology 40, no. 1 (2014): 50–69. http://dx.doi.org/10.1666/12056.

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Lagerstättenfrom the Precambrian–Cambrian transition have traditionally been a relatively untapped resource for understanding the paleoecology of the “Cambrian explosion.” This quantitative paleoecological study is based on 10,238 fossil specimens belonging to 100 animal species, 11 phyla, and 15 ecological categories from the lower Cambrian (Series 2, Stage 3) Chengjiang biota (Mafang locality near Haikou, Yunnan Province, China). Fossils were systematically collected within a 2.5-meter-thick sequence divided into ten stratigraphic intervals. Each interval represents an induced time-averaged

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34

Van Wychen, Wesley, Luke Copland, Laurence Gray, Dave Burgess, Brad Danielson, and Martin Sharp. "Spatial and temporal variation of ice motion and ice flux from Devon Ice Cap, Nunavut, Canada." Journal of Glaciology 58, no. 210 (2012): 657–64. http://dx.doi.org/10.3189/2012jog11j164.

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AbstractSpeckle tracking of repeat RADARSAT-2 fine-beam imagery acquired over 24 day periods in March 2009 allowed the creation of updated surface motion maps for the entire Devon Ice Cap, Canada. Error analysis indicates that speckle tracking can determine ice motion to an accuracy of ~5 ma-1. Comparisons with earlier velocity maps from the mid-1990s and 2000 reveal velocity patterns that largely agree with flow regimes described previously. However, motion determined along East5 Glacier indicates an increase in surface velocities between the studies. Additionally, Southeast2 Glacier has sign

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Conway Morris, Simon. "Ediacaran survivors." Paleontological Society Special Publications 6 (1992): 69. http://dx.doi.org/10.1017/s2475262200006298.

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Ediacaran taxa are a characteristic element of latest Precambrian biotas, with an effectively global distribution. Their time range is not well understood, but with one possible exception from western Canada Ediacaran faunas appear always to post-date the late Precambrian glaciations. There is also growing evidence that many Ediacaran taxa disappeared before the Precambrian-Cambrian boundary. These disappearances traditionally have been ascribed to changes in taphonomic circumstances, but a series of extinctions is a plausible alternative. Ediacaran fossils pose two major problems: Notwithstan

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Butterfield, N. J., and C. J. Nicholas. "Burgess Shale-type preservation of both non-mineralizing and ‘shelly’ Cambrian organisms from the Mackenzie Mountains, northwestern Canada." Journal of Paleontology 70, no. 6 (1996): 893–99. http://dx.doi.org/10.1017/s0022336000038579.

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Lower to Middle Cambrian shales of the Mount Cap Formation in the Mackenzie Mountains, northwestern Canada, host a variety of Burgess Shale-type macrofossils, including anomalocarid claws, several taxa of bivalved arthropod, articulated hyolithids, and articulated chancelloriids. Hydrofluoric acid processing has also yielded a broad range of organic-walled fossils, most of which are derived from forms more typically known as shelly fossils; e.g., trilobites, inarticulate brachiopods, small shelly fossils (SSF), hyolithids, and chancelloriids. Organic-walled hyolithids include conchs, opercula

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García-Bellido, Diego C., Jean Vannier, and Desmond Collins. "Soft-Part Preservation in two Species of the ArthropodIsoxysfrom the Middle Cambrian Burgess Shale of British Columbia, Canada." Acta Palaeontologica Polonica 54, no. 4 (2009): 699–712. http://dx.doi.org/10.4202/app.2009.0024.

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Moysiuk, J., and J. B. Caron. "A new hurdiid radiodont from the Burgess Shale evinces the exploitation of Cambrian infaunal food sources." Proceedings of the Royal Society B: Biological Sciences 286, no. 1908 (2019): 20191079. http://dx.doi.org/10.1098/rspb.2019.1079.

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Radiodonts, a clade of Cambro-Devonian stem group euarthropods, have classically been regarded as nektonic apex predators. However, many aspects of radiodont morphology and ecology have remained unclear because of the typically fragmentary nature of fossil material. Here, we describe a new hurdiid radiodont based on abundant and exceptionally well-preserved fossils from the Burgess Shale (Marble Canyon area, British Columbia, Canada). Cambroraster falcatus gen. et sp. nov . is characterized by an extra-large horseshoe-shaped head carapace, bearing conspicuous posterolateral spinous processes,

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Legg, David. "Multi-Segmented Arthropods from the Middle Cambrian of British Columbia (Canada)." Journal of Paleontology 87, no. 3 (2013): 493–501. http://dx.doi.org/10.1666/12-112.1.

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A new arthropod, Kootenichela deppi n. gen. n. sp., is described from the Stanley Glacier exposure of the middle Cambrian (Series 3, Stage 5) Stephen Formation in Kootenay National Park (British Columbia, Canada). This taxon possesses a number of primitive arthropod features such as an elongate, homonomous trunk (consisting of at least 29 segments), poorly sclerotised trunk appendages, and large pedunculate eyes associated with an anterior (ocular) sclerite. The cephalon encompasses a possible antenna-like appendage and enlarged raptorial appendages with a bipartite peduncle and three spinose

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Nanglu, Karma, and Jean-Bernard Caron. "Symbiosis in the Cambrian: enteropneust tubes from the Burgess Shale co-inhabited by commensal polychaetes." Proceedings of the Royal Society B: Biological Sciences 288, no. 1951 (2021): 20210061. http://dx.doi.org/10.1098/rspb.2021.0061.

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The in situ preservation of animal behaviour in the fossil record is exceedingly rare, but can lead to unique macroecological and macroevolutionary insights, especially regarding early representatives of major animal clades. We describe a new complex ecological relationship from the middle Cambrian Burgess Shale (Raymond Quarry, Canada). More than 30 organic tubes were recorded with multiple enteropneust and polychaete worms preserved within them. Based on the tubicolous nature of fossil enteropneusts, we suggest that they were the tube builders while the co-preserved polychaetes were commensa

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Izquierdo-López, Alejandro, and Jean-Bernard Caron. "A possible case of inverted lifestyle in a new bivalved arthropod from the Burgess Shale." Royal Society Open Science 6, no. 11 (2019): 191350. http://dx.doi.org/10.1098/rsos.191350.

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The origin of the arthropod carapace, an enlargement of cephalic tergites, can be traced back to the Cambrian period. However, its disparity and evolution are still not fully understood. Here, we describe a new ‘bivalved’ arthropod, Fibulacaris nereidis gen. et sp. nov., based on 102 specimens from the middle Cambrian (Wuliuan Stage) Burgess Shale, Marble Canyon area in British Columbia's Kootenay National Park, Canada. The laterally compressed carapace covers most of the body. It is fused dorsally and merges anteriorly into a conspicuous postero-ventrally recurved rostrum as long as the carap

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Yugan, Jin, Hou Xianguang, and Wang Huayu. "Lower Cambrian pediculate lingulids from Yunnan, China." Journal of Paleontology 67, no. 5 (1993): 788–98. http://dx.doi.org/10.1017/s0022336000037057.

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The vermiform pedicle is one of the most distinctive organs of modern lingulids, but it is rarely preserved. Only two fossil specimens of lingulids with pedicle casts have been reported, one from the Ordovician and the other from the Devonian. No record of fossil pedicles of Lingulella and Lingulepis, the dominant Cambrian and Early Ordovician lingulids, is known. Fossil lingulids from the Lower Cambrian of Chengjiang County, Yunnan, suggest that the structure and function of the pedicle of the lingulids has not changed significantly from its first appearance. A comparison of fossil pedicle of

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LONSDALE, OWEN. "The Liriomyza (Agromyzidae: Schizophora: Diptera) of California." Zootaxa 2850, no. 1 (2011): 1. http://dx.doi.org/10.11646/zootaxa.2850.1.1.

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The Californian species of Liriomyza Mik are revised, including descriptions, illustrations, photographs and a key to species. Sixty-three species are now known to occur in the state, 12 of which are described here as new: L. bispinula, L. conclavis, L. cunicularia, L. merga, L. miserabilis, L. nebulosa, L. parabella, L. phyllodes, L. projecta, L. salpingion, L. tricornis and L. trixivora. Liriomyza virginica Spencer is included as a junior synonym of L. helianthi Spencer, and L. similis Spencer is included as a synonym of L. artemisiae Spencer. Two species are newly recorded in the United Sta

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Johnston, Paul A., Kimberley J. Johnston, Christopher J. Collom, Wayne G. Powell, and Robyn J. Pollock. "Palaeontology and depositional environments of ancient brine seeps in the Middle Cambrian Burgess Shale at The Monarch, British Columbia, Canada." Palaeogeography, Palaeoclimatology, Palaeoecology 277, no. 1-2 (2009): 86–105. http://dx.doi.org/10.1016/j.palaeo.2009.02.013.

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Pisera, A. "Palaeontology of sponges — a review." Canadian Journal of Zoology 84, no. 2 (2006): 242–61. http://dx.doi.org/10.1139/z05-169.

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The fossil record of sponges is a very old one, and begins in the Precambrian, but is rather incomplete. Only those sponges with a rigid skeleton, i.e., Hexactinosida and Lychniscosida (both hexactinellids), lithistids (demosponges with desmas), and sponges with a massive calcareous skeleton (polyphyletic demosponges and Calcarea) have a more or less continuous fossil record that is, however, inadequately studied, especially from the Tertiary. The beginning of sponge diversification during the Cambrian is relatively well known thanks to their very good preservation, from the Chengjiang fauna i

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Ou, Qiang, Jean Vannier, Xianfeng Yang, et al. "Evolutionary trade-off in reproduction of Cambrian arthropods." Science Advances 6, no. 18 (2020): eaaz3376. http://dx.doi.org/10.1126/sciadv.aaz3376.

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Trade-offs play a crucial role in the evolution of life-history strategies of extant organisms by shaping traits such as growth pattern, reproductive investment, and lifespan. One important trade-off is between offspring number and energy (nutrition, parental care, etc.) allocated to individual offspring. Exceptional Cambrian fossils allowed us to trace the earliest evidence of trade-offs in arthropod reproduction. †Chuandianella ovata, from the early Cambrian Chengjiang biota of China, brooded numerous (≤100 per clutch), small (Ø, ~0.5 mm) eggs under carapace flaps. The closely related †Wapti

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Harvey, Thomas H. P. "Carbonaceous preservation of Cambrian hexactinellid sponge spicules." Biology Letters 6, no. 6 (2010): 834–37. http://dx.doi.org/10.1098/rsbl.2010.0377.

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Early fossil sponges offer a direct window onto the evolutionary emergence of animals, but insights are limited by the paucity of characters preserved in the conventional fossil record. Here, a new preservational mode for sponge spicules is reported from the lower Cambrian Forteau Formation (Newfoundland, Canada), prompting a re-examination of proposed homologies and sponge inter-relationships. The spicules occur as wholly carbonaceous films, and are interpreted as the remains of robust organic spicule sheaths. Comparable sheaths are restricted among living taxa to calcarean sponges, although

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Peel, J. S., S. C. Morris, and J. R. Ineson. "A second glimpse of Early Cambrian life: new collections from Sirius Passet, North Greenland." Rapport Grønlands Geologiske Undersøgelse 155 (January 1, 1992): 48–50. http://dx.doi.org/10.34194/rapggu.v155.8180.

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The German mining term lagerstatten, referring to a rock of any composition containing constituents of economic interest, has been widely applied to occurrences of abundant or unusually well preserved fossils (cf. Seilacher et al., 1985). The Middle Cambrian Burgess Shale of western Canada is perhaps the most famous of all fossil-lagerstatt, with many of the approximately 140 known species preserving exquisite details of the soft anatomy of members of a community of organisms that was fossilised more than 500 million years ago (Whittington, 1985: Conway Morris, 1979, 1986; Gould, 1989). Other

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Caron, Jean-Bernard, David M. Rudkin, and Stuart Milliken. "A new Late Silurian (Pridolian) naraoiid (Euarthropoda: Nektaspida) from the Bertie Formation of southern Ontario, Canada—delayed fallout from the Cambrian explosion." Journal of Paleontology 78, no. 6 (2004): 1138–45. http://dx.doi.org/10.1017/s0022336000043948.

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The discovery of a new naraoiid nektaspid in the Upper Silurian (Pridolian) of southeastern Ontario significantly extends the range of this unusual group. Nektaspids are nonmineralized arthropods typical of Early and Middle Cambrian soft-bottom communities, but were thought to have become extinct in the Late Ordovician. The unique holotype specimen of Naraoia bertiensis n. sp. comes from a Konservat–Lagerstätte deposit renowned for its eurypterid fauna (the Williamsville Member of the Bertie Formation). Naraoia bertiensis lacks thoracic segments and is morphologically similar to Naraoia compac

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Collom, C. J., P. A. Johnston, and W. G. Powell. "Reinterpretation of ‘Middle’ Cambrian stratigraphy of the rifted western Laurentian margin: Burgess Shale Formation and contiguous units (Sauk II megasequence), Rocky Mountains, Canada." Palaeogeography, Palaeoclimatology, Palaeoecology 277, no. 1-2 (2009): 63–85. http://dx.doi.org/10.1016/j.palaeo.2009.02.012.

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