A new early Cambrian Konservat-Lagerstätte expands the occurrence of Burgess Shale-type deposits on the Yangtze Platform

Du, Kun-sheng; Ortega‐Hernández, Javier; Yang, Jie; Yang, Xiaoyu; Guo, Qing-hao; Li, Wei; He, Jie; Li, Ke-ren; Du, Jing; Hou, Jin-bo; Zhang, Xiguang

doi:10.1016/j.earscirev.2020.103409

Cited by 21 publications

(11 citation statements)

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“…Trunk legs have also been previously reported from other sites [29,30], interpreted as 'ventral appendages' [30]. These are morphologically identical to the trunk legs shown herein, and thus, are most probably trunk legs displaced ventrally.…”

Section: Previous and Current Interpretations Of The Morphology Of Tu...supporting

confidence: 82%

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The problematic Cambrian arthropod Tuzoia and the origin of mandibulates revisited

Izquierdo-López

Caron

2022

R. Soc. open sci.

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The origin of mandibulates, the hyperdiverse arthropod group that includes pancrustaceans and myriapods, dates back to the Cambrian. Bivalved arthropod groups such as hymenocarines have been argued to be early mandibulates, but many species are still poorly known, and their affinities remain uncertain. One of the most common and globally distributed Cambrian bivalved arthropods is Tuzoia . Originally described in 1912 from the Burgess Shale based on isolated carapaces, its full anatomy has remained largely unknown. Here, we describe new specimens of Tuzoia from the Canadian Burgess Shale (Wuliuan, Cambrian) showcasing exceptionally preserved soft tissues, allowing for the first comprehensive reconstruction of its anatomy, ecology and evolutionary affinities. The head bears antennae and differentiated cephalic appendages. The body is divided into a cephalothorax, a homonomous trunk bearing ca 10 pairs of legs with heptopodomerous endopods and enlarged basipods, and a tail fan with two pairs of caudal rami. These traits suggest that Tuzoia swam along the seafloor and used its spinose legs for predation or scavenging. Tuzoia is retrieved by a Bayesian phylogenetic analysis as an early mandibulate hymenocarine lineage, exemplifying the rapid diversification of this group in open marine environments during the Cambrian Explosion.

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Section: Previous and Current Interpretations Of The Morphology Of Tu...supporting

confidence: 82%

“…Eyes and eye stalks have been identified in some specimens [26,27], but their exact position and morphology remain ambiguous [27,28]. Poorly preserved antennae [25,26] and legs [29][30][31] have also been reported, but lack detailed information on their morphology and position, preventing a full reconstruction of Tuzoia.…”

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confidence: 99%

The problematic Cambrian arthropod Tuzoia and the origin of mandibulates revisited

Izquierdo-López

Caron

2022

R. Soc. open sci.

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“…These and other species were later studied by Vannier et al (2007). Following Walcott (1912) and Resser (1929), Tuzoia was discovered in many localities in North America (Resser and Howell, 1938;Briggs, 1977;Robison and Richards, 1981;Lieberman, 2003;Vannier et al, 2007;Moore and Lieberman, 2009;Robison et al, 2015), Europe (Czech Republic) (Chlupac and Kordule, 2002;Fatka and Herynk, 2016), Siberia (Ivantsov et al, 2005), China (Endo and Resser, 1937;P'an, 1957;Shu, 1990;Luo et al, 1999;Yuan and Zhao, 1999;Chen et al, 2005;Peng et al, 2007;Yao et al, 2009;He et al, 2012;Wen et al, 2015Wen et al, , 2019Chen et al, 2017;Du et al, 2020), and Australia (Glaessner, 1979;Nedin, 1995;Paterson et al, 2008;Garcıa-Bellido et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

New Data on the Bivalved Arthropod Tuzoia From the Cambrian (Series 2, Stage 4) Guanshan Biota in Kunming, Yunnan, Southwest China

Liu

2022

Front. Earth Sci.

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The Guanshan Biota (Cambrian Series 2, Stage 4) is a typical Burgess Shale-type biota and is one of the most significant Cambrian Konservat-Lagerstätten from China. Tuzoia is a relatively common non-biomineralized bivalved arthropod from the Guanshan Biota and, stratigraphically, ranges from Cambrian Series 2 through the Miaolingian Series. Based on new specimens from the Longbaoshan Section of the Wulongqing Formation, this study distinguished and described in detail the Tuzoia in the Guanshan Biota. Supplemental details about the larval stage of Tuzoia tylodesa were obtained, and the ontogenetic pattern of T. tylodesa was revised. The confirmation of the presence of Tuzoia retifera and the first report of Tuzoia cf. canadensis in the Guanshan biota, as well as the confirmation of the presence of T. retifera and the first report of T. cf. canadensis out of Laurentia (in Gondwana), indicated that species communication between paleogeographic plates is possible.

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“…A possible Ramskoeldia consimilis found outside of South China occurred in the Latham Shale, which is generally considered as having been deposited in a proximal shelf above the fair-weather wave [ 22 ]. A recently reported amplectobeluid of indeterminable species from the Fandian biota in South China was deposited in a similar setting with the Chengjiang biota [ 66 ]. Guanshancaris is preserved in the Guanshan biota, deposited in an offshore transition between the fair-weather wave base and the storm wave base [ 33 , 46 ].…”

Section: Discussionmentioning

confidence: 99%

Amplectobeluid Radiodont Guanshancaris gen. nov. from the Lower Cambrian (Stage 4) Guanshan Lagerstätte of South China: Biostratigraphic and Paleobiogeographic Implications

Zhang

Lin

et al. 2023

Biology

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Radiodonta, an extinct stem-euarthropod group, has been considered as the largest predator of Cambrian marine ecosystems. As one of the radiodont-bearing Konservat-Lagerstätten, the Guanshan biota (South China, Cambrian Stage 4) has yielded a diverse assemblage of soft-bodied and biomineralized taxa that are exclusive to this exceptional deposit. “Anomalocaris” kunmingensis, the most abundant radiodont in the Guanshan biota, was originally assigned to Anomalocaris within the Anomalocarididae. Despite this taxon being formally assigned to the family Amplectobeluidae more recently, its generic assignment remains uncertain. Here, we present new materials of “Anomalocaris” kunmingensis from the Guanshan biota, and reveal that the frontal appendages possess two enlarged endites; all endites bear one posterior auxiliary spine and up to four anterior auxiliary spines; three robust dorsal spines and one terminal spine protrude from the distal part. These new observations, allied with anatomical features illustrated by previous studies, allow us to assign this taxon to a new genus, Guanshancaris gen. nov. Brachiopod shell bearing embayed injury and incomplete trilobites, associated with frontal appendages in our specimens, to some extent confirm Guanshancaris as a possible durophagous predator. The distribution of amplectobeluids demonstrates that this group is restricted to Cambrian Stage 3 to Drumian, and occurs across South China and Laurentia within the tropics/subtropics belt. Moreover, the amount and abundance of amplectobeluids evidently decreases after the Early–Middle Cambrian boundary, which indicates its possible preference for shallow water, referring to its paleoenvironmental distribution and may be influenced by geochemical, tectonic, and climatic variation.

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A new early Cambrian Konservat-Lagerstätte expands the occurrence of Burgess Shale-type deposits on the Yangtze Platform

Cited by 21 publications

References 83 publications

The problematic Cambrian arthropod Tuzoia and the origin of mandibulates revisited

The problematic Cambrian arthropod Tuzoia and the origin of mandibulates revisited

New Data on the Bivalved Arthropod Tuzoia From the Cambrian (Series 2, Stage 4) Guanshan Biota in Kunming, Yunnan, Southwest China

Amplectobeluid Radiodont Guanshancaris gen. nov. from the Lower Cambrian (Stage 4) Guanshan Lagerstätte of South China: Biostratigraphic and Paleobiogeographic Implications

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