Early Silurian radiolaria from northern Nevada, USA

Noble, Paula J.; Ketner, Keith B.; McClellan, W.A.

doi:10.1016/s0377-8398(96)00026-6

Cited by 13 publications

(7 citation statements)

References 6 publications

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“…Early Silurian (Llandoverian) radiolarians have been described previously by RUst (1892), Sturmer (1952, 1966, Nazarov and Ormiston (1993), Li (1994), Malez and Reich (1997), Noble et al (1997, 1998), and MacDonald (1998 and by Goodbody (1986), who selectively described only the palaeosceniidids principally from the Wenlock. Among these, the fauna from the Road River Formation is most similar to that of Noble et al (1997Noble et al ( , 1998.…”

Section: Introductionmentioning

confidence: 85%

Llandoverian (Early Silurian) radiolarians from the Road River Formation of east-central Alaska and the new family Haplotaeniatumidae

Won

Blodgett

Nestor³

2002

J. Paleontol.

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Well-preserved Early Silurian radiolarians were recovered from siliceous rock fragments contained in a limestone boulder from the Road River Formation, Yukon River area, east-central Alaska. The radiolarians represent five genera, one of which, Parasecuicollacta, is new, and 17 species, nine of which are new: Secuicollacta magnitesta, S. tatondukensis, S. parvitesta, S. alaskensis, Parasecuicollacta bipola, P. hexactina, P. multispinosa, P. nannoglobosa, and Diparvapila pygmaea. Among the 17 species, 11 belong to the family Rotasphaeridae. The ectopically placed spicule, which is the diagnostic characteristic of the subfamily Secuicollactiniinae within the family Haplentactiniidae, is shown to be one of the primary units, a diagnostic feature of the family Rotasphaeridae. Three species are assigned to the family Haplotaeniatumidae, which is newly established in this paper. The family is characterized by the concentric and spiral arrangement of shell with a proloculus and commonly the presence of a pylome, and by the absence of an internal spicule. Several other taxa are extremely rare and are of uncertain taxonomic position. This fauna is characterized by very plentiful rotasphaerids, whereas all the other radiolarian taxa are very rare.The Road River fauna is similar to that from the Cherry Spring Chert of Nevada, thought to be late Rhuddanian based on a sparse graptolite fauna, and is very similar to an unreported Early Silurian Canadian Arctic fauna, whose stratigraphic range based on the graptolite fauna is within the early Telychian. Conodonts, chitinozoans, scolecodonts, and graptolites were also recovered from the siliceous rock fragments. Five genera and seven species of chitinozoans, four genera and five species of conodonts, and two uncertain taxa of graptolites were identified. Their biostratigraphy indicates that the Alaskan radiolarian fauna belongs to the upper Aeronian to lower Telychian of the Llandoverian.

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Section: Introductionmentioning

confidence: 85%

Llandoverian (Early Silurian) radiolarians from the Road River Formation of east-central Alaska and the new family Haplotaeniatumidae

Won

Blodgett

Nestor³

2002

J. Paleontol.

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“…The Alaskan assemblage (Fig. 5a) described by Won et al (2002) shares 10 of its 17 species in common with the assemblage described by Noble et al (1997Noble et al ( , 1998 from Nevada, which contains 19 species (see Won et al [2002] for a detailed comparison). Our assemblage shares at least 5 (and possibly 8) species in common with the Alaskan fauna (Secuicollacta bipola, S. hexactinia, S. parvitesta, Haplotaeniatum aperturatum, Orbiculopylorum marginatum, Secuicollacta sp.…”

Section: Similarity To Coeval Radiolarian Assemblagesmentioning

confidence: 97%

“…(b) Global oceanic circulation during the lower Silurian (after Ziegler et al, 1977;Armstrong et al, 2009;Servais et al, 2014). such as the Alaskan assemblage of Won et al (2002), the Nevadan faunas of Noble et al (1997Noble et al ( , 1998 and the Swedish assemblage of Umeda & Suzuki (2005). Several hypotheses detailed hereafter can possibly explain this global pattern of distribution for the Silurian and they may be responsible for the relative similarities between the equatorial and peripolar assemblages.…”

Section: Palaeogeographical Distribution and Palaeoceanographic Scenamentioning

confidence: 98%

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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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“…Silurian radiolarians are known from North America, Asia and Europe, in Llandovery to Přídolí strata, but described faunas are rare and their biostratigraphic potential has yet to be realized fully. Silurian radiolarians have been recorded from Germany (Stürmer, 1952;Noble et al, 1998), the southern Urals part of Russia and Kazakhstan (Nazarov, 1975(Nazarov, , 1988Nazarov & Popov, 1980;Nazarov & Ormiston, 1984Amon et al, 1995), the Canadian Arctic (Goodbody, 1986;Renz, 1988;MacDonald, 1998MacDonald, , 1999MacDonald, , 2003MacDonald, , 2004MacDonald, , 2006aJones & Noble, 2006), Japan (Furutani, 1990;Wakamatsu et al, 1990;Aitchison et al, 1996;Umeda, 1997Umeda, , 1998aKurihara & Sashida, 1998), Australia (Aitchison, 1991), Poland (Gorka, 1994), China (Li, 1994), Texas (Noble, 1994), Nevada (Noble et al, 1997(Noble et al, , 1998, Sweden (Maletz & Reich, 1997;Noble & Maletz, 2000;Umeda & Suzuki, 2005) and Alaska (Won et al, 2002). Illustrations of the radiolarian faunas of purported Silurian age from southern France (Rüst, 1892) indicate they are more likely to be from Lower Carboniferous strata.…”

Section: Stratigraphic Significancementioning

confidence: 99%

The Radiolaria of the Herefordshire Konservat-Lagerstätte (Silurian), England

Siveter

Aitchison

Siveter

et al. 2007

J. Micropalaeontol.

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Abstract. Concretions of the Wenlock Series Herefordshire Konservat-Lagerstätte of the Welsh Borderland have yielded one of the few recorded Silurian radiolarian faunas world-wide and the only one known from the Silurian of Britain. The low diversity radiolarian fauna consists of new forms of Inaniguttidae (Inanihella sagena sp. nov. and Inanihella sp.), Haplentactiniidae (Haplentactinia armista sp. nov.) and a previously reported form of Secuicollactidae (Secuicollacta hexatinia (Won et al., 2002)). The fauna has affinities with Silurian radiolarian assemblages of the Urals, the Canadian Arctic and Alaska. Stratigraphically the Herefordshire fauna appears transitional between established Silurian radiolarian biozones.

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Early Silurian radiolaria from northern Nevada, USA

Cited by 13 publications

References 6 publications

Llandoverian (Early Silurian) radiolarians from the Road River Formation of east-central Alaska and the new family Haplotaeniatumidae

Llandoverian (Early Silurian) radiolarians from the Road River Formation of east-central Alaska and the new family Haplotaeniatumidae

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

The Radiolaria of the Herefordshire Konservat-Lagerstätte (Silurian), England

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