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

Pereira, Sofía; Silva, C. Marques da; Sá, Artur A.; Pires, M.; Guedes, A. Marques; Budil, Petr; Laibl, Lukáš; Rábano, Isabel

doi:10.3140/bull.geosci.1642

Cited by 5 publications

(4 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Species previously considered typical members of Illaenus have for instance later been recognized as species of Thaleops Conrad, 1843, which illustrates the problems involved with illaenid taxonomy (see Whittington 1954;Amati & Westrop 2004;. Jaanusson (1954) discussed a number of criteria to separate Stenopareia from other illaenid taxa, but subsequent studies have reassessed many of the original concepts and a major revision of the genus and other illaenids has been overdue Pereira et al 2017).…”

Section: Goldillaenoides Taimyricusmentioning

confidence: 99%

“…Furthermore, the highly variable number of cusps on the anterior margin of the pygidial doublure in Stenopareia species was taken as an indication of the genus being paraphyletic as presently understood. Pereira et al (2017) recognized that species of Stenopareia have a broader glabella (tr.) with straighter axial furrows, and a pygidium with a wide (tr.)…”

Section: Goldillaenoides Taimyricusmentioning

confidence: 99%

See 1 more Smart Citation

Late Ordovician trilobites from the Taimyr Peninsula, Arctic Russia

Ebbestad

Fortey

2019

Journal of Systematic Palaeontology

View full text Add to dashboard Cite

Ordovician trilobites from the important sequences of the Taimyr Peninsula, Arctic Russia have been poorly studied since the work by Balashova (1959, 1960). Newly collected and well-preserved specimens from Late Ordovician sections, along with the original collections of Balashova, form the basis of a reappraisal of 56 Upper Ordovician (Sandbian-Katian) trilobites. New species include Bronteopsis tenuirhachis, Dionide trigintasegmentata, Failleana superba, Pararemopleurides ornatissimus, Raymondella plastron, Robergia subtilis and R. nikolaiseni. Probable new species include: Stenopareia sp. aff. S. glaber, and Stygina sp. aff. S. latifrons. A new subgenus Bilobaspis of the monorakine genus Evenkaspis, and a new species, Evenkaspis (Bilobaspis) mirabilis, are proposed. Thoracic segments and pygidium are correctly associated for the first time with cephala of the hitherto poorly understood Taimyraspis. The genera Effnaspis and Yumenaspis are likely junior synonyms of Taimyraspis. A placement within the Ityophoridae is suggested for Taimyraspis, together with the closely related genera Ityophorus and Frognaspis. Comparison of Goldillaenoides taimyricus with Failleana suggests that these are also closely related. A provisional placement of the former in the Styginidae is adopted. Bronteopsis nannus Balashova could be a juvenile B. tenuirhachis, and is regarded as a nomen dubium. The genus Ceratevenkaspis dominates among the monorakines on Taimyr, while Monorakos itself has not been collected. Robergia nikolaiseni has a narrow cranidial border, which is also present in the type species of Robergia. Two biofacies are identified in the current collections. The first, the raphiophorid association, is widespread around low latitude Ordovician palaeocontinents, identifying marginal shelf sites; the association is not critical in defining palaeocontinents themselves. Inner shelf faunas of the monorakine-cheirurid-illaenid association have taxa that comprise a distinctive group with a strong link between Taimyr and the Ordovician Siberian craton. The trilobites described herein support reconstructions showing Taimyr peripheral to the Siberian craton during the Ordovician.

show abstract

Section: Goldillaenoides Taimyricusmentioning

confidence: 99%

Section: Goldillaenoides Taimyricusmentioning

confidence: 99%

Late Ordovician trilobites from the Taimyr Peninsula, Arctic Russia

Ebbestad

Fortey

2019

Journal of Systematic Palaeontology

View full text Add to dashboard Cite

show abstract

“…The works comprising this volume include, on one hand, those contributions of Colmenar et al (2017) and Pereira et al (2017) focused on the study of the Ordovician faunas (mainly brachiopods and trilobites) from Portugal, Spain, Czech Republic and Morroco; and secondly the contributions of Lu et al (2017), Chevrinais et al (2017) and Klug et al (2017), all of them focused on the Devonian Period including two main approaches, conodont biostratigraphy (Lu et al 2017), and palaeoecology (Chevrinais et al 2017, Klug et al 2017.…”

Section: Special Issue Contributionsmentioning

confidence: 99%

“…This contribution is an important addition to the knowledge of the Portuguese Late Ordovician benthic marine communities, providing crucial new data to constrain the biostratigraphy of the Ferradosa Formation and the palaeogeographical setting of this region at that time. The second Ordovician contribution, is that presented by Pereira et al (2017) focused on the illaenid trilobites Vysocania and Octillaenus from the Upper Ordovician of the Czech Republic, Portugal, Spain and Morocco, with the revision of the criteria used for the definition of these genera, the relationships between them and its geographical distribution. It is important to highlight that this study has allowed the description of two new species V. moraveci sp.…”

Section: Special Issue Contributionsmentioning

confidence: 99%

Life in the Palaeozoic: an overview of land and sea ecosystems

Ferrón¹,

Martínez‐Pérez²

2017

Bull. Geosci.

View full text Add to dashboard Cite

The Palaeozoic Era: an overview of land and sea ecosystems The Palaeozoic Era, lasting from 541-252 million years ago, was a time of dramatic geographical, climatic, and evolutionary changes. During this Era, life experienced a tremendous transformation and many critical macroevolutionary events took place, including important biotic radiations and diversifications, and three of the five major mass extinctions on the Earth history (Raup & Sepkoski 1982). The advent and diversification of most modern metazoan phyla occurred during the Cambrian and Ordovician periods, in the so-called Cambrian Explosion and Great Ordovician Biodiversification Event (GOBE) (Servais et al. 2010). During the Ordovician, tectonic movements lead to a global cooling that culminated in the Hirnantian glaciation and the first of the five major extinction crisis (Sheehan 2001). Shortly after, life recovered and land was colonized during the Silurian by plants and different groups of arthropods, establishing the first forests during the Devonian (Behrensmeyer 1992). The land transformation caused drastic terrestrial changes with the development of new habitats that allowed the appearance of freshwater ecosystems with increasingly complex ecological interactions (Scheckler 2006). In this context, the colonization of terrestrial environments took place by the first tetrapods, constituting one of the most important events in the evolutionary history of vertebrates (Niedźwiedzki et al. 2010). At the same time, diversity-saturation in marine benthic habitats and the high abundance of planktonic food lead to the occupation of the water column by many animal groups, an event known under the name of "the Devonian Nekton Revolution" (Klug et al. 2009). At the end of the Devonian Period, a second major extinction episode occurred at the Frasnian-Famennian boundary in both marine and terrestrial ecosystems (Barash 2016). Life flourished again during the Carboniferous with unprecedented levels of atmospheric oxygen, which lead to the evolution of unusual gigantic body sizes in several non-related groups of animals (Harrison et al. 2010). The end of the Palaeozoic Era was marked by the greatest extinction of the Phanerozoic Eon, the Permo-Triassic extinction, which entailed the loss of as much as 95% of all species on Earth (Benton & Twitchett 2003). All these key events have determined in a large extent the later evolutionary history of life and, as consequence, their study is critical for achieving a proper understanding of the Mesozoic and Cenozoic eras, as well as explaining the current biological, taxonomical and ecological diversity. Fossil Record provides a unique opportunity in this sense, and therefore its understanding is one of the primary goals of palaeontology. This requires undoubtedly a multidisciplinary approach, including systematic, palaeogeographic, palaeoecologic and evolutionary studies that, in a lower scale, are represented in the special volume herein published, grouping some of the contributions presented at the special workshop ...

show abstract

The trilobite assemblage of theDeclivolithusFauna (lower Katian, Ordovician) of Morocco: a review with new data

Pereira,

Rábano,

Gutiérrez-Marco

2024

J. Paleontol.

View full text Add to dashboard Cite

Intense commercial exploitation of fossils in the famous El Qaid Errami area in the last 20 years has led to the discovery of the interesting Declivolithus Fauna in the Moroccan Anti-Atlas. This unusually large trinucleid trilobite, described originally from the Czech Republic, is the most conspicuous element of an assemblage mainly occurring in the Bofloss locality, a local biofacies development of pelagic mudstones and sandstones cropping out in a structurally isolated place in the Tizi n'Ounfite area. Here we revise this Declivolithus Fauna trilobite assemblage from Morocco, increasing the known trilobite diversity from four to 11 species: Ulugtella? biformis n. sp., Selenopeltis cf. S. vultuosa, Phacopidina quadrata, Eudolatites cf. E. bondoni, Prionocheilus cf. P. verneuili, Nobiliasaphus cf. N. kumatox, Cyclopyge cf. C. rediviva, Symphysops stevaninae, Heterocyclopyge sp., Dionide sp., and Declivolithus alfredi. The new data and the very good preservation of specimens in sandstones, clarify the specific identity of previously reported taxa. Although the stratigraphical correlation of the fossiliferous levels remains problematic, it probably corresponds to the upper part of the Lower Ktaoua Formation or to the lower half of the Upper Tiouririne Formation. Most taxa support previous assignment of the Moroccan assemblage to the late Berounian (ca. early Katian, Ka2), although a middle Berounian (ca. Sa2–Ka1) age cannot be excluded. Most of the identified species are known from the Czech Republic (eight out of 11), showing that the strong faunal link between Morocco and the Czech Republic still existed during the Late Ordovician, being stronger than the link with the coeval Ibero-Armorican domain faunas. UUID: http://zoobank.org/3e6e55c7-168d-4008-98ba-38a795581ca3

show abstract

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

Cited by 5 publications

References 16 publications

Late Ordovician trilobites from the Taimyr Peninsula, Arctic Russia

Late Ordovician trilobites from the Taimyr Peninsula, Arctic Russia

Life in the Palaeozoic: an overview of land and sea ecosystems

The trilobite assemblage of theDeclivolithusFauna (lower Katian, Ordovician) of Morocco: a review with new data

Contact Info

Product

Resources

About