Advances in Cambrian stratigraphy and paleontology: Integrating correlation techniques, paleobiology, taphonomy and paleoenvironmental reconstruction

Zhu, Maoyan; Babcock, Loren E.; Shanchi, Peng

doi:10.1016/j.palwor.2006.10.016

Cited by 289 publications

(251 citation statements)

References 14 publications

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“…Several episodes of profound turnover and mass extinction have been noted at the Ediacaran-Cambrian boundary and throughout the Cambrian (17,18). Our sampling-standardized analysis confirms high extinction rates throughout the Cambrian (Fig.…”

Section: Resultssupporting

confidence: 75%

Diversity partitioning during the Cambrian radiation

Lin

Kiessling

2015

Proc. Natl. Acad. Sci. U.S.A.

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The fossil record offers unique insights into the environmental and geographic partitioning of biodiversity during global diversifications. We explored biodiversity patterns during the Cambrian radiation, the most dramatic radiation in Earth history. We assessed how the overall increase in global diversity was partitioned between within-community (alpha) and between-community (beta) components and how beta diversity was partitioned among environments and geographic regions. Changes in gamma diversity in the Cambrian were chiefly driven by changes in beta diversity. The combined trajectories of alpha and beta diversity during the initial diversification suggest low competition and high predation within communities. Beta diversity has similar trajectories both among environments and geographic regions, but turnover between adjacent paleocontinents was probably the main driver of diversification. Our study elucidates that global biodiversity during the Cambrian radiation was driven by niche contraction at local scales and vicariance at continental scales. The latter supports previous arguments for the importance of plate tectonics in the Cambrian radiation, namely the breakup of Pannotia.Cambrian radiation | alpha diversity | beta diversity | low competition | Pannotia

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Section: Resultssupporting

confidence: 75%

Diversity partitioning during the Cambrian radiation

Lin

Kiessling

2015

Proc. Natl. Acad. Sci. U.S.A.

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“…8) implies that upwelling sulfidic waters led to widespread seawater anoxia in most parts of the basin along the southern margin of the Yangtze Platform, which is consistent with the previous study . This major anoxic event may have resulted in the extinction of many SSF-secreting organisms (Zhu et al, 2006). However, we infer that this was a local anoxic event occurring in this basin while the open ocean was oxygenated to modern-like levels, evidenced by high ␦ 98 Mo values (∼+2.4‰) (Chen et al, 2015).…”

Section: Paleoenvironment Along the Southern Margin Of The Yangtze Plmentioning

confidence: 85%

Marine redox variations and nitrogen cycle of the early Cambrian southern margin of the Yangtze Platform, South China: Evidence from nitrogen and organic carbon isotopes

Wang

Struck

Guo

et al. 2015

Precambrian Research

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“…The occurrence of trilobite spines also suggests an early or middle Qiongzhusian age for the Xihaoping Member, and indicates the presence of a , Steiner et al 2007. The occurrence of the cosmopolitan index fossil Rhombocorniculum cancellatum (Li & Holmer 2004), indicating a late Qiongzhusian age (approximately equivalent to the late Atdabanian to early Botomian Siberian stages), or Stage 3 of Series 2 in the new subdivision scheme for the Cambrian System (Zhu et al 2006).…”

Section: Locality and Stratigraphymentioning

confidence: 96%

Early Cambrian eodiscoid trilobite Hupeidiscus orientalis from South China: ontogeny and implications for affinities of Mongolitubulus-like sclerites

Li¹,

Steiner²,

Zhu³

et al. 2012

Bull. Geosci.

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Delicately phosphatized specimens of the eodiscoid Hupeidiscus orientalis were documented from the lower Cambrian Shuijingtuo Formation through acetic acid maceration of limestone samples. The material enables us to better understand the meraspid to holaspid ontogenetic development of H. orientalis, and to evaluate its relations with other eodiscoid taxa occurring in South China. The development of its pygidium and thoracic segments is very similar to that of "Shizhudiscus" longquanensis, suggesting that Shizhudiscus is a junior synonym of Hupeidiscus. However, the synonymization of Hupeidiscus with Tsunyidiscus remains open as little is known about the ontogeny of the latter genus. The spines of H. orientalis are of particular importance. Like the enigmatic sclerite taxon Mongolitubulus, its spines are ornamented with a distinctive scaly sculpture, shedding new light on the origin and affinities of Mongolitubulus-like sclerites. The squamose ornament was gradually transformed from granules on the exoskeletal surface at the base of the spines. Other strands of evidence, e.g., the outline, exuviating growth, and the spatio-temporal distribution, also suggest that some isolated sclerites previously assigned to Mongolitubulus are possibly related to the spines of eodiscoid trilobites. This finding implies that such morphologically similar spines may be essentially of multiple pan-arthropod origins (bradoriids, eodiscoids, etc.), and they may be of morphologic analogues rather than homologues, suggesting that Mongolitubulus shall be cautiously used as a generic name unless the circumstance of its type specimens from Mongolia gets clarified. •

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Advances in Cambrian stratigraphy and paleontology: Integrating correlation techniques, paleobiology, taphonomy and paleoenvironmental reconstruction

Cited by 289 publications

References 14 publications

Diversity partitioning during the Cambrian radiation

Diversity partitioning during the Cambrian radiation

Marine redox variations and nitrogen cycle of the early Cambrian southern margin of the Yangtze Platform, South China: Evidence from nitrogen and organic carbon isotopes

Early Cambrian eodiscoid trilobite Hupeidiscus orientalis from South China: ontogeny and implications for affinities of Mongolitubulus-like sclerites

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