The oldest brachymetopid trilobite record from the European peri-Gondwana

Pereira, Sofía; Silva, Carlos Marques da; Pires, M.; Sá, Artur A.

doi:10.3140/bull.geosci.1535

Cited by 4 publications

(6 citation statements)

References 18 publications

(28 reference statements)

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“…nov.). Niuchangella (= Radnoria) is also widely distributed geographically and stratigraphically, ranging from the upper Sandbian or lower Katian to the Ludfordian (Pereira et al 2015), but N. agastor sp. nov. from the Arndell Sandstone is very similar to the type species N. mei ta nen sis from the lower-middle Rhuddanian of South China.…”

Section: Age Of the Arndell Sandstonementioning

confidence: 99%

“…Owens (in Owens & Hammann 1990) assigned Niuchangella to the Rorringtoniidae but Adrain & Chatterton (1993) transferred it to the Scharyiidae, mentioning as evidence a few characters including the apparent lateral displacement of L1 (actually a lateral constriction of the glabella in front of L1) in the type species, though that feature is not generally characteristic of members of that family. Assignment to the Scharyiidae was maintained by Jell & Adrain (2003), Owens & Fortey (2009), Adrain (2013) and Pereira et al (2015), the last acknowledging that there were difficulties in assessing the affinities of the genus based on the only illustration of N. meitanensis. Additional specimens of the type species have since been illustrated by Wei & Zhan (2018, fig.…”

Section: Pepodes Agrestismentioning

confidence: 99%

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Late Ordovician and early Silurian trilobites from Tasmania

Holloway¹,

Banks²,

Banks³

2022

Bull. Geosci.

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The Arndell Sandstone crops out in the Florentine Valley and Tiger Range of southern Tasmania, about 80 km westnorth-west of Hobart (Fig. 1). The formation contains at several levels a diverse fauna of shelly fossils including corals, bryozoans, brachiopods, bivalves, gastropods and trilobites, of which only the brachiopods have been described previously (Sheehan & Baillie 1981, Laurie 1991. Graptolites have been recorded from the upper part of the formation. The trilobite fauna, described herein, differs markedly in composition between lower and upper parts of the formation, with no genera in common. The lower fauna includes six species belonging to the trinucleid Auritolithus gen. nov., the calymenids Salterocoryphe? and Vietnamia, the lichid Amphilichas? and two indeterminate genera of the Asaphidae. The upper fauna includes seven species belonging to the illaenid Pepodes gen. nov., the scutelluid Japonoscutellum, the brachymetopid Niuchangella, the encrinurids Arndellaspis gen. nov. and Cromus?, the calymenid Gravicalymene and the homalonotid Bron gniartella.The Arndell Sandstone was named by Baillie (1979) to incorporate the Westfield Beds of Corbett & Banks (1974) though that unit as originally conceived did not include the uppermost strata now assigned to the formation. The older term was retained by some authors, as Westfield Sandstone (e.g. Banks 1988, Laurie 1991), but the name Arndell Sandstone has prevailed (Banks & Burrett 1989, Calver et al. 2014. The lithology and stratigraphic relations of the formation were summarized by Calver et al. (2014, p. 256). It consists of about 250 m of buff-coloured micaceous siltstone and fine-grained sandstone, with coarser sandstones towards the top. Bioturbation and vertical feeding burrows are common, and the presence in places of herringbone crossbedding is said to be indicative of 397

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Section: Age Of the Arndell Sandstonementioning

confidence: 99%

Section: Pepodes Agrestismentioning

confidence: 99%

Late Ordovician and early Silurian trilobites from Tasmania

Holloway¹,

Banks²,

Banks³

2022

Bull. Geosci.

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“…upper Sandbian-lower Katian) of Portugal (see Pereira et al 2015b). A high-latitude peri-Gondwanan origin was suggested for this genus (Pereira et al 2015b), although the fact that Lichas was first described from Baltica apparently justifies it being considered as Baltic (e.g.…”

Section: Biostratigraphical and Palaeobiogeografical Significance Of mentioning

confidence: 99%

A Kralodvorian (upper Katian, Upper Ordovician) benthic association from the Ferradosa Formation (central Portugal) and its significance for the redefinition and subdivision of the Kralodvorian Stage

Colmenar¹,

Pereira²,

Pires³

et al. 2017

Bull. Geosci.

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“…Specimens of V. iberica from this region came from the overlying Porto de Santa Anna Formation, the base of which is also marked by an ironstone bed of late Berounian age, this species being the most common trilobite in it. In the Mação region, V. iberica occurs in the Cabeço do Peão Formation (see Young 1988 for lithostratigraphy, and Pereira et al 2015b for information on the locality), which correlates with the Chão do Amieiral and Louredo formations.…”

Section: Geographical and Geological Settings Of Materialsmentioning

confidence: 99%

The illaenid trilobites Vysocania (Vaněk & Vokáč, 1997) and Octillaenus (Barrande, 1846) from the Upper Ordovician of the Czech Republic, Portugal, Spain and Morocco

Pereira¹,

Silva²,

Sá³

et al. 2017

Bull. Geosci.

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The illaenid trilobite Vysocania is widely represented in the Upper Ordovician of the Czech Republic, Portugal and Spain, and is one of the most characteristic taxa in the high-latitude peri-Gondwana palaeobiogeographical region to which it is endemic. Three species of the genus that were formerly assigned to Stenopareia and Zetillaenus, from the Czech Republic and Spain respectively, are herein revised, and a new species is described from the Czech Republic. The genus Octillaenus, of which a new species is described from the Upper Ordovician of Morocco, is considered to have arisen from Vysocania through paedomorphic (neotenic) processes. The relationships between Vysocania, Octillaenus, Stenopareia and Zetillaenus are reviewed and the criteria used in the definition of these taxa discussed. Species assigned to Vysocania are V. vaneki (type-species), V. iberica, V. moraveci sp. nov. and V. panderi; species assigned to Octillaenus are O. hisingeri (type-species) and O. marocanus sp. nov. Vysocania appears for the first time in the lower Berounian (Sandbian) and has its last undoubted record in the upper Berounian (upper Katian); Octillaenus is presently restricted to the Kralodvorian (upper Katian).•

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The oldest brachymetopid trilobite record from the European peri-Gondwana

Cited by 4 publications

References 18 publications

Late Ordovician and early Silurian trilobites from Tasmania

Late Ordovician and early Silurian trilobites from Tasmania

A Kralodvorian (upper Katian, Upper Ordovician) benthic association from the Ferradosa Formation (central Portugal) and its significance for the redefinition and subdivision of the Kralodvorian Stage

The illaenid trilobites Vysocania (Vaněk & Vokáč, 1997) and Octillaenus (Barrande, 1846) from the Upper Ordovician of the Czech Republic, Portugal, Spain and Morocco

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