Unusual occurrence of dalmanitid trilobites in the Lochkovian of the Prague Basin (Czech Republic)

Budil, Petr; Fatka, Oldřich; Rak, Štěpán; Horbinger, F

doi:10.3140/bull.geosci.1431

Cited by 2 publications

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“…An occurrence of the Scutellum sensu lato group and possibly also Longiproetus (known from the Pragian in the Barrandian area, but also occurring elsewhere up to the lower Givetian; see Šnajdr 1980, Vaněk and Valíček 2002, Van Viersen et al 2012 is important for this trilobite assemblage. Such findings indicate that trilobite faunas in the upper portion of Acanthopyge Limestone (Tortodus kockelianus Zone below the "dark interval" sensu Hladil 1993) in Koněprusy area were also enriched by at least short-time immigrations of some "Rhenish-Type" taxa from other areas (current France, Germany, Belgium, Poland or Moravia); for such faunal exchanges within Devonian faunas, see also Havlíček (1994), Galle et al (1995), Flick (1999Flick ( , 2018, Chlupáč and Kolář (2001), Budil and Kolář (2004), Budil et al (2009Budil et al ( , 2014, Van Prescher (2009, 2011), Mergl (2014), Weiner et al (2018) a. o. Together with the previously described occurrence of Calceola in Acanthopyge Limestone (Mergl 2014), Chlupáč (1983) with trilobite assemblage at Zadní Kobyla small quarry outcrop (Calceola-bearing locality).…”

Section: Discussionmentioning

confidence: 99%

Trilobite assemblage of Calceola-bearing beds in Acanthopyge Limestone (Choteč formation, Middle Devonian, Eifelian, Prague Basin, the Czech Republic)

Budil

Mergl

2019

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Abstract The trilobite assemblage of Calceola-bearing beds in the upper part of Acanthopyge Limestone (Choteč Formation, Eifelian) in the Koněprusy area, the Czech Republic, is described. Together with occurrence of Calceola, it indicates absence of significant palaeogeographic barriers restricting the distribution of the Rhenish-Type faunas in the Middle Devonian. The generic composition of the gathered trilobite assemblage somewhat differs from typical Acanthopyge-Phaetonellus assemblage characteristic for the Acanthopyge Limestone facies in possible absence and/or very rare occurrence of Phaetonellus, and only infrequent occurrence of Acanthopyge. Phacopid Chotecops cf. hoseri (Hawle et Corda, 1847) distinctly dominates; all other taxa are rather rare. Important is an occurrence of scutelluids of the Scutellum sensu lato group (preservation of remains does not enable more precise determination) and Longiproetus(?). Trilobite remnants are generally poorly preserved and very fragmented (only minute shields are not affected), which support a high-dynamic, shallow-water original environment.

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Section: Discussionmentioning

confidence: 99%

Trilobite assemblage of Calceola-bearing beds in Acanthopyge Limestone (Choteč formation, Middle Devonian, Eifelian, Prague Basin, the Czech Republic)

Budil

Mergl

2019

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“…The presence of the graptolite Monograptus uniformis angustidens Přibyl, 1940, at the base of the Aynasu horizon, indicates the lowermost Lochkovian (Maksimova, 1978a). However, no other index fossil was identified in the Kockbaital horizon, and late Silurian ages should not be rejected in some localities (see Budil et al, 2014).…”

Section: Geological Settingsmentioning

confidence: 99%

A taxonomic revision of the Early Devonian dalmanitid trilobite Kasachstania Maksimova, 1972 from central Kazakhstan

2020

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The dalmanitid trilobite Kasachstania Maksimova, 1972, previously reported from the Lower Devonian of Kazakhstan and North America (USA) and the upper Silurian–Lower Devonian of South America (Bolivia and Argentina), is revised. Kasachstania kasachstanica (Balashova in Maksimova,1968) and K. septicostata (Maksimova, 1968) are regarded as junior synonyms of the type species K. saryarkensis (Maksimova, 1960), all from the Lower Devonian of the type locality in central Kazakhstan (northern Balkhash). On the basis of a new diagnosis, K. ulrichi ulrichi (Delo, 1940) from the Emsian of the United States, K. ulrichi asiatica (Maksimova, 1968), K. pristina (Maksimova, 1968), and K. alperovichi Pour et al., 2019, from the Lower Devonian of Kazakhstan, K. andii (Kozłowski, 1923) from the upper Silurian–Lower Devonian of Bolivia, and K. gerardoi Edgecombe and Ramsköld, 1994, from the upper Silurian–Lower Devonian of Bolivia and Argentina are excluded from Kasachstania. This genus, represented only by K. saryarkensis and K. kiikbaica (Maksimova, 1968), is restricted to the Lower Devonian of central Kazakhstan, corresponding to the Balkhash–Mongolo–Okhotsk province in the paleobiogeographic context of the Old World Realm, instead of being nearly cosmopolitan as previously considered. In addition, we provide some remarks about Saryarkella Maksimova, 1978b, a monospecific dalmanitid genus largely overlooked although valid from the Emsian of the same area in central Kazakhstan.

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Unusual occurrence of dalmanitid trilobites in the Lochkovian of the Prague Basin (Czech Republic)

Cited by 2 publications

References 14 publications

Trilobite assemblage of Calceola-bearing beds in Acanthopyge Limestone (Choteč formation, Middle Devonian, Eifelian, Prague Basin, the Czech Republic)

Trilobite assemblage of Calceola-bearing beds in Acanthopyge Limestone (Choteč formation, Middle Devonian, Eifelian, Prague Basin, the Czech Republic)

A taxonomic revision of the Early Devonian dalmanitid trilobite Kasachstania Maksimova, 1972 from central Kazakhstan

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