Haplotaeniatum faunas (Radiolaria) from the Llandoverian (Silurian) of Nevada and Germany

Noble, Paula J.; Braun, Andreas; McClellan, W.A.

doi:10.1127/njgpm/1998/1998/705

Cited by 13 publications

(53 citation statements)

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“…occurrence. Upper Rhuddanian, Garden Pass, Northern Adobe Range, Nevada (Noble et al, 1998); middle Aeronian, Kallholn Formation, Siljan district, Sweden (Umeda & Suzuki, 2005); middle Aeronian (sample MT18), Chalonnes-sur-Loire section, France (this study); lower Telychian, Road River Formation, Tatonduk River area, east-central Alaska (Won et al, 2002). remarks.…”

Section: Systematic Palaeontologymentioning

confidence: 65%

“…3.9) that can be identified in thin section (found in samples MT1, MT8, MT18, MT19, MT20). Those well-preserved radiolarians, as well as several others extracted and observed with a SeM (MT8, MT19) seem to be carbonized (RAMAN spectra), such as the Saxothuringian fauna reported by Noble et al (1998).…”

Section: Results Petrographymentioning

confidence: 88%

“…cf. S. tatondukensis Won et al, 2002 and to the spumellarian family Haplotaeniatidae (Haplotaeniatum aperturatum Noble et al, 1998, Orbiculopylorum marginatum Noble et al, 1998and O. splendens Noble et al, 1998 for sample MT18. Among the radiolarians recovered from samples MT8, MT19 and MT20, only spumellarian haplotaeniatids were identified.…”

Section: Radiolariansmentioning

confidence: 99%

“…More particularly, a few specimens of ?O. adobensis Noble et al, 1998 were identified in samples MT8 and MT19, and one specimen was identified as Orbiculopylorum granti MacDonald, 2006, in sample MT20. The occurrence of identified taxa is summarized in Figure 2.…”

Section: Radiolariansmentioning

confidence: 99%

“…remarks. This species was first assigned to the genus Orbiculopylorum by Noble et al (1998) based on a less dense meshwork interstitial to the medullary and cortical areas. It was reassigned to the genus Haplotaeniatum by Won et al (2002) because the separation between cortical and medullary areas is not as clear in this species as it is in other species of Orbiculopylorum.…”

Section: Systematic Palaeontologymentioning

confidence: 99%

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Biostratigraphical and palaeobiogeographical implications of Lower Silurian Radiolaria from black cherts of the Armorican Massif (France)

Tetard

Danelian

Noble

2014

J. Micropalaeontol.

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Abstract. A moderately well-preserved radiolarian assemblage was recovered from organic-rich black chert in a Llandovery (Lower Silurian) sequence that crops out in southern Brittany (Chalonnes-sur-Loire section, Armorican Massif, France). The assemblage is composed of two families (Rotasphaeridae and Haplotaeniatidae), four genera (?Diparvapila, Secuicollacta, Orbiculopylorum, Haplotaeniatum) and 13 species. Some were identified from whole specimens preserved in silica and extracted following dilute hydrofluoric acid processing, while others were recognized in thin-section preparations, as they are beautifully preserved as ‘carbonized’ microfossils. The age range suggested by conodonts and chitinozoans yielded after HF processing from one of the 27 studied samples is in good agreement with the previously published age based on graptolites. The recovered radiolarians are discussed, documented and compared with known Rhuddanian, Aeronian and lower Telychian assemblages in the literature. The stratigraphic ranges are extended for the species Secuicollacta bipola, S. hexactinia, S. parvitesta, Orbiculopylorum granti and O. splendens based on our new data. A significant number of radiolarians found in our samples occur in Llandovery sections from Alaska, Nevada, Arctic Canada and Sweden. These similarities are used to discuss the palaeodistribution of Lower Silurian Radiolaria and our observations support the hypothesis of a wide geographical distribution for these Palaeozoic species.

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Section: Systematic Palaeontologymentioning

confidence: 65%

Section: Results Petrographymentioning

confidence: 88%

Section: Radiolariansmentioning

confidence: 99%

Section: Radiolariansmentioning

confidence: 99%

Section: Systematic Palaeontologymentioning

confidence: 99%

See 3 more Smart Citations

Biostratigraphical and palaeobiogeographical implications of Lower Silurian Radiolaria from black cherts of the Armorican Massif (France)

Tetard

Danelian

Noble

2014

J. Micropalaeontol.

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Fossil plankton depth zones

Boucot

Chen

2009

Palaeoworld

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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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Haplotaeniatum faunas (Radiolaria) from the Llandoverian (Silurian) of Nevada and Germany

Cited by 13 publications

References 0 publications

Biostratigraphical and palaeobiogeographical implications of Lower Silurian Radiolaria from black cherts of the Armorican Massif (France)

Biostratigraphical and palaeobiogeographical implications of Lower Silurian Radiolaria from black cherts of the Armorican Massif (France)

Fossil plankton depth zones

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

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