Early Paleozoic radiolarian plankton diversity and the Great Ordovician Biodiversification Event

Danelian, Taniel; Monnet, Claude

doi:10.1016/j.earscirev.2021.103672

Cited by 8 publications

(3 citation statements)

References 111 publications

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“…Radiolarians are the only siliceous biomineralizing zooplankton known to have participated in the GOBE. The gradual or sudden increment of the taxonomic richness experienced by marine organisms, including radiolarians, during Early to Middle Ordovician is recognizable in many diversity studies conducted regardless of the region (Stigall et al, 2019;Danelian and Monnet, 2021 (Cocks and Torsvik, 2020). These adjacent terranes account for a majority of Late Ordovician radiolarian occurrences: Malongulli and Ballast formations, Australia (Webby and Blom, 1986;Goto and Ishiga, 1991;Goto et al, 1992;Iwata et al, 1995;Noble and Webby, 2009); Pingliang and Zhaolaoyu formations, North China (Wang, 1993;Song et al, 2000;Wang et al, 2010); Wufeng Formation, South China (Wang and Zhang, 2011;Zhang et al, 2018); and Ulkuntas Horizon, Kazakhstan (Nazarov and Popov, 1980), reported to date.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Late Sandbian (Sa2) radiolarians of the Pingliang Formation from the Guanzhuang section, Gansu Province, China

Perera

Aitchison

2021

J. Paleontol.

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A diverse, well-preserved radiolarian assemblage is reported from the Sandbian age Climacograptus bicornis Graptolite Biozone. This new assemblage, recovered from the Pingliang Formation in the Guanzhuang section, China, includes six new species along with 13 other previously described taxa. Geminusphaera new genus incorporates G. grandis n. sp. and G. kongtongensis n. sp. and is proposed for inaniguttids constructed from two distinct porous spheres bearing seven or more primary spines. Protopylentonema new genus is introduced to incorporate pylomate entactinarians with five-rayed initial spicules. It includes P. ordosensis n. sp. as well as P. aperta, P. rimata, and P. insueta that were formerly assigned to Kalimnasphaera. Micro-computed tomography investigation of skeletal microstructure supports establishment of the new genera together with other new spumellarian species: Haplotaeniatum implexa n. sp., Inanigutta quadrispinosa n. sp., and Kalimnasphaera pingliangensis n. sp. It also indicates that family-level reassignment of Etymalbaillella from the Proventocitidae to the Ceratoikiscidae is appropriate. Global distribution of Late Ordovician radiolarian occurrences highlights a strong preference for areas with equatorial to tropical sea surface temperatures. This must have led to ecological stress among radiolarian communities in adapting to global cooling in the Hirnantian. UUID: http://zoobank.org/3d3f55b8-0e70-4f9f-9738-265750d8ec3a.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Late Sandbian (Sa2) radiolarians of the Pingliang Formation from the Guanzhuang section, Gansu Province, China

Perera

Aitchison

2021

J. Paleontol.

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“…Radiolarians are a major plankton group of the Paleozoic, capable of providing important insight into the evolution of hetero-trophic plankton during their Ordovician diversification. Analysis of paleobiodiversity dynamics relies on documentation of chronostratigraphically well-constrained radiolarian assemblages (e.g., Danelian and Monnet, 2021).…”

Section: Introductionmentioning

confidence: 99%

Micro-CT analysis of Katian radiolarians from the Malongulli Formation, New South Wales, Australia, and implications for skeletogenesis

Perera

Aitchison

2023

J. Paleontol.

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A diverse and well-preserved radiolarian assemblage from the Malongulli Formation, New South Wales, Australia, contains 13 species representing 10 genera and six families. One new genus, Wiradjuri, is introduced to accommodate pre-Devonian single-shelled entactiniid taxa, and one new species, Secuicollacta malongulliensis, is recorded together with some previously described forms. The microstructures of the “rotasphaerid structure/primary unit” and the “ectopic spicule” are investigated to validate their roles as fundamental units in the Secuicollactidae, together with comprehensive documentation of the previously enigmatic Pseudorotasphaera internal skeleton. The results of this investigation suggest that, among all radiolarian genera that survived the Late Ordovician Mass Extinction event (LOME) and transitioned into the Silurian, Secuicollacta, Haplotaeniatum, and Palaeoephippium maintained stable body plans during the transition and were more successfully established. The selective advantages these lineages had during the LOME were most likely spontaneous outcomes of the mode of structural development involving sequential skeletogenesis and a tendency to evolve toward simpler body plans. UUID: http://zoobank.org/264c026f-35af-4025-a4f7-de8f9a91f8b9

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A review of Paleozoic phytoplankton biodiversity: Driver for major evolutionary events?

Kroeck

Mullins²,

Zacaï

et al. 2022

Earth-Science Reviews

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Early Paleozoic radiolarian plankton diversity and the Great Ordovician Biodiversification Event

Cited by 8 publications

References 111 publications

Late Sandbian (Sa2) radiolarians of the Pingliang Formation from the Guanzhuang section, Gansu Province, China

Late Sandbian (Sa2) radiolarians of the Pingliang Formation from the Guanzhuang section, Gansu Province, China

Micro-CT analysis of Katian radiolarians from the Malongulli Formation, New South Wales, Australia, and implications for skeletogenesis

A review of Paleozoic phytoplankton biodiversity: Driver for major evolutionary events?

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