Arenig (Middle Ordovician) ostracods from Baltoscandia: Fauna, assemblages and biofacies

Tinn, Oive; Meidla, Tõnu; Ainsaar, Leho

doi:10.1016/j.palaeo.2006.05.002

Cited by 23 publications

(38 citation statements)

References 20 publications

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“…The palaeobasin was mostly interpreted (Männil 1966;Jaanusson 1976Jaanusson , 1982 to represent a shallow and fairly uniform environment. However, the ostracode assemblage data (Tinn & Meidla 1999Tinn et al 2006) have suggested differences between the marginal North Estonian, the mostly offshore Central Baltoscandian and the far offshore Scanian Confacies zones in the early Middle Ordovician, and this supports the notion that the confacies belts reflect a rough depth zonation of the palaeobasin (Männil & Meidla 1994).…”

Section: Taphonomy and Palaeogeographical Distributionmentioning

confidence: 86%

“…The Baltoscandian Palaeobasin was characterized by a distinct biofacies pattern during the early Middle Ordovician (Tinn 2002, Tinn et al 2006. C. socialis occurs together with O. bocki, B. palmata, R. mitis, P. grewingki and several species of Euprimites a.o.…”

Section: Discussionmentioning

confidence: 99%

“…Recent comprehensive research on lower Middle Ordovician ostracode faunas (Tinn 2002, Tinn et al 2006 revealed difficulties in the practical differentiation between species. This paper focusses on: 1) a critical analysis of the morphological features of Conchoprimitia; 2) an analysis of the species concept and variability in Conchoprimitia; 3) a revision of Conchoprimitia species in the early Middle Ordovician Baltoscandian Palaeobasin.…”

Section: B Amentioning

confidence: 99%

“…Ostracodes, microscopic crustaceans (usually 1-2 mm), with a distinctive bivalved carapace, are widely used in palaeoecology and biostratigraphy because of their relatively short stratigraphic ranges and high abundance in shelf sequences , Williams et al 2005, Tinn et al 2006. The systematics of recent ostracodes is based on soft body anatomy and the carapace features are of secondary importance.…”

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confidence: 99%

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Intraspecific variation and polymorphism in the ostracode Conchoprimitian socialis (Brøgger, 1882) from the early Middle Ordovician Baltoscandian Palaeobasin

Tinn¹,

Meida²,

Sohar³

2010

Bull. Geosci.

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The eridostracan ostracode genus Conchoprimitia Öpik, 1935 appears among the earliest ostracodes in the carbonate succession of the Ordovician Baltoscandian Palaeobasin. Over the past one hundred years, more than twenty species of Conchoprimitia have been recognized from early Middle Ordovician sediments. The microsculpture has been regarded as one of the most important features for distinguishing between different species of Conchoprimitia. However, four main types of microsculpture (smooth, punctate, reticulate and rugose/striate) are often transitional, occurring on different areas of the carapace and are not therefore discrete taxonomically important characters. As no clear distinction can be made between different carapace morphologies, the early Middle Ordovician Conchoprimitia species of Baltoscandia should be regarded as morphotypes of one polymorphic species -Conchoprimitia socialis (Brøgger, 1882). C. socialis was an opportunistic species, which developed different microsculpture on the carapace surface in different lithofacies in the Baltoscandian Palaeobasin.•

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Section: Taphonomy and Palaeogeographical Distributionmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Section: B Amentioning

confidence: 99%

mentioning

confidence: 99%

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Intraspecific variation and polymorphism in the ostracode Conchoprimitian socialis (Brøgger, 1882) from the early Middle Ordovician Baltoscandian Palaeobasin

Tinn¹,

Meida²,

Sohar³

2010

Bull. Geosci.

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“…2) (e.g. Budil et al 2007;Polechová 2013), although their species diversity was still low, at least as compared to Baltica Meidla 1999, 2004;Tinn et al 2006;Schallreuter 1980), Avalonia (Siveter 2009) and Laurentia (Burr and Swain 1965;Swain 1962;Swain 1987;Landing et al 2013). Ostracod faunas of the Klabava and Šárka formations record the beginning of the successive increase of ostracod diversity that reached its peak in the early Katian of the Late Ordovician (Přibyl 1979;Schallreuter and Krůta 1988).…”

Section: Introductionmentioning

confidence: 99%

The earliest ostracods from the Ordovician of the Prague Basin, Czech Republic

Lajblová¹,

Kraft²

2014

Acta Geologica Polonica

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ABSTRACT:Lajblová, K. and Kraft, P. 2014. The earliest ostracods from the Ordovician of the Prague Basin, Czech Republic. Acta Geologica Polonica, 64 (4), 367-392. Warszawa.The earliest ostracods from the Bohemian Massif (Central European Variscides) have been recorded from the Middle Ordovician of the Prague Basin (Barrandian area), in the upper Klabava Formation, and became an abundant component of fossil assemblages in the overlying Šárka Formation. Both early ostracod associations consist of eight species in total, representing mainly eridostracans, palaeocopids, and binodicopids. The revision, description, or redescription of all species and their distribution in the basin is provided. Their diversification patterns and palaeogeographical relationships to ostracod assemblages from other regions are discussed.

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Early Ordovician (Floian) ostracods from the Cordillera Oriental, Northwest Argentina

Salas

2011

Geological Journal

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The ostracod fauna from the Floian (Lower Ordovician) strata of the Cordillera Oriental, Argentina (Acoite Formation) are documented. One new genus Acoitella and four species are recognized, two of which are new (Nanopsis victoria sp. nov. and Conchoprimitia frequens sp. nov.). The diversity of the Early Ordovician ostracod faunas of the Central Andean Basin is evaluated. Compared with other regions, the ostracod diversity, at generic and specific level, of the Cordillera Oriental was comparatively high during the Tremadocian (nine species recorded) and comparatively low during the Floian (four species recorded). The taxonomic composition of the fauna is similar during the entire Early Ordovician of the Cordillera Oriental, where it displays a high percentage of soanellids. The Floian assemblages are characterized by the dominance of the eridostracan C. frequens sp. nov. with a high percentage of nondimorphic palaeocopids: Nanopsis and two genera of the Soanellidae family (Saltite and Acoitella gen nov.). An ostracod shell bed is described and interpreted to be a parautochthonous assemblage, as a result of transport within the same habitat. The composition of the fauna, with the presence of Saltite and Nanopsis, shows significant affinities with East Gondwana. Copyright © 2011 John Wiley & Sons, Ltd.

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Arenig (Middle Ordovician) ostracods from Baltoscandia: Fauna, assemblages and biofacies

Cited by 23 publications

References 20 publications

Intraspecific variation and polymorphism in the ostracode Conchoprimitian socialis (Brøgger, 1882) from the early Middle Ordovician Baltoscandian Palaeobasin

Intraspecific variation and polymorphism in the ostracode Conchoprimitian socialis (Brøgger, 1882) from the early Middle Ordovician Baltoscandian Palaeobasin

The earliest ostracods from the Ordovician of the Prague Basin, Czech Republic

Early Ordovician (Floian) ostracods from the Cordillera Oriental, Northwest Argentina

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