Uppermost Ordovician bivalves from the Prague Basin (Hirnantian, Perunica, Bohemia)

Kříž, Jiří; Steinová, Marika

doi:10.3140/bull.geosci.1141

Cited by 25 publications

(23 citation statements)

References 20 publications

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“…The Goniophora thula-Mytilarca boucoti Community is composed of species which show their closest biological ties to species described from the late Wenlock and Ludlow of Gotland, Sweden, Baltica (Liljedahl 1983(Liljedahl , 1984(Liljedahl , 1985(Liljedahl , 1991(Liljedahl , 1992(Liljedahl and 1994 and from the latest Ordovician, late Wenlock and early Ludlow of the Prague Basin, Bohemia, Perunica (Kříž 2008, Kříž & Steinová 2009). …”

Section: Discussionmentioning

confidence: 99%

“…Mytilarca boucoti sp. nov. is most closely related to the Late Ordovician, latest Hirnantian Mytilarca mareki Kříž & Steinová, 2009 from the Prague Basin, Bohemia. The Alaskan species has a fixed number of lateral teeth (2) while the Hirnantian species has a variable number of the lateral teeth (1-3).…”

Section: Goniophora Thula-mytilarca Boucoti Communitymentioning

confidence: 99%

“…-According to Kříž & Steinová (2009) Remarks. -In the collection of Alaskan bivalves are several relatively small single valves with a shell form similar to that of the Early Palaeozoic bivalves assigned by several authors to the Schizodidae.…”

Section: ?Colpomya Aff Hugini Liljedahl 1994mentioning

confidence: 99%

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Silurian Bivalvia from Chichagof Island, Southeast Alaska (Alexander terrane)

Kříž¹,

Blodgett²,

Rohr³

2011

Bull. Geosci.

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The new Silurian Bivalvia Goniophora thula-Mytilarca boucoti Community from a new locality east of the Hoonah Airport on Chichagof Island, Southeast Alaska, U.S.A. is composed of 9 species [?Colpomya aff. hugini Liljedahl, 1994 and ?Colpomya aff. audae Liljedahl, 1994 (Colpomyidae) . In this paper two new species are described. The Goniophora thula-Mytilarca boucoti Community most probably occupied a gently inclined upper slope environment lying seaward of a cyanobacterial reef front which marked the outer edge of a late Silurian carbonate platform (represented by the Kennel Creek Limestone). The fauna of this locality consists of a rich benthos, especially rich in brachiopods, but secondarily dominated by bivalves and gastropods. Cephalopods are rare, favositid tabulate corals are also present, but form only a very minor component. The new community is most closely related to the homologous and analogous late Wenlock Bivalvia community described from Gotland, Sweden, Baltica. Similar biotic ties are with the shallow water early Ludlow Janicula potens Community from the Prague Basin, Bohemia, Perunica. Cosmopolitanism is characteristic for the Silurian Bivalvia genera, which were dispersed in most regions of the world due to their relatively long pelagic larval life and relatively small distances between the basins, islands and continents in the Silurian. For the distribution of Bivalvia during the Silurian were more limiting physical factors like temperature, salinity, substrate, food, oxygen content, light, and depth. The fauna described here is from the Alexander terrane, an accreted terrane which appears to represent a rifted block of the eastern Siberian palaeocontinent. The latter interpretation is based on faunal affinities, notably brachiopods, but suggested by other groups such as gastropods and sponges, as well as on the basis of similarities in sedimentary succession.•

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Section: Discussionmentioning

confidence: 99%

Section: Goniophora Thula-mytilarca Boucoti Communitymentioning

confidence: 99%

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Silurian Bivalvia from Chichagof Island, Southeast Alaska (Alexander terrane)

Kříž¹,

Blodgett²,

Rohr³

2011

Bull. Geosci.

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“…Subsequent taxonomical contributions indicate the presence of five lingulate and craniate brachiopods in the Bohemian Hirnantia Fauna (Mergl 1986, Havlíček 1994. Marek & Havlíček (1967) had also already noted the presence of bryozoans, trilobites, crinoids, gastropods, bivalves and other invertebrate groups, but, with the exception of gastropods (Marek 1963) and bivalves (Kříž & Steinová 2009), these groups have not been taxonomically revised up to now. In the last decades, a few new occurrences of the Hirnantia Fauna were observed in territory of Prague: Prague-Pankrác (Štěpánek 1984), Prague-Řepy (Štorch 1982), Prague-Nové Butovice (Štorch 1991), Prague-Velká Ohrada (Štorch 1994), Prague-Malá Ohrada, and Prague-Řeporyje (both unpublished).…”

Section: The Hirnantia Fauna In the Prague Basinmentioning

confidence: 99%

“…A new interpretation of the earlier sources (Marek 1951(Marek , Štorch 1986a, taxonomic revision, and new observations led Kříž & Steinová (2009) to recognitise the Modiolopsis pragensis Community in the upper part of the Kosov Formation. This community is dominated by the eponymous bivalve associated with rare gastropods, brachiopods, rostroconchs and the trilobite Brongniartella.…”

Section: The Hirnantia Fauna In the Prague Basinmentioning

confidence: 99%

Earliest occurrence of the Hirnantia Fauna in the Prague Basin (Czech Republic)

Mergl¹

2011

Bull. Geosci.

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The Hirnantia Fauna was observed at a new stratigraphic level in the topmost Králův Dvůr Formation at Praha-Řeporyje. Up to now this distinctive late Ordovician fauna has been known only from the summit of the Kosov Formation in the Prague Basin. The newly observed fauna consists of draboviids Hirnantia sagittifera, Kinnella kielanae kielanae, taxonomically poor ostracods, a machaeridian Lepidocoleus, a new undetermined carpoid, and the very rare Mucronaspis. The fauna is much poorer than the fauna of the 'Perník Bed' below. The presence of the Hirnantia Fauna at this new level indicates a significant cooling and eustatic fall in the sea level resulting in a shallow subtidal environment (BA 3-4) prior to the deposition of glaciomarine diamictites at the base of the Kosov Formation.•

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Upper Ordovician Thylacocephala (Euarthropoda, Eucrustacea) from Bohemia indicate early ecological differentiation

Roy

Rak

Budil

et al. 2021

Papers in Palaeontology

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Thylacocephala is a clade of marine bivalved euarthropods generally considered to belong to Eucrustacea, although their affinities within this group remain unsettled. Detailed thylacocephalan anatomy and tagmosis is poorly known, and the majority of taxa have been described based only on the valves of the carapace. While some thylacocephalans are considered to have been fully nektic, others probably had a nekto-benthic mode of life. The group makes its last appearance in the Upper Cretaceous of Lebanon, while the previously oldest definite record is from the Silurian of Wisconsin, USA. This paper describes two new thylacocephalans, Pseudoprotozoea irenae gen. et sp. nov. and Bohemiacaris libori gen. et sp. nov. from the Sandbian (Upper Ordovician

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Uppermost Ordovician bivalves from the Prague Basin (Hirnantian, Perunica, Bohemia)

Cited by 25 publications

References 20 publications

Silurian Bivalvia from Chichagof Island, Southeast Alaska (Alexander terrane)

Silurian Bivalvia from Chichagof Island, Southeast Alaska (Alexander terrane)

Earliest occurrence of the Hirnantia Fauna in the Prague Basin (Czech Republic)

Upper Ordovician Thylacocephala (Euarthropoda, Eucrustacea) from Bohemia indicate early ecological differentiation

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