Devonian radiolarians of Russia

Afanasieva, M. S.; Amon, E. O.

doi:10.1134/s0031030111110013

Cited by 18 publications

(8 citation statements)

References 67 publications

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“…The new species differs from S. multisphaerata Afanasieva et Amon, 2011 in the absence of differentiation of the external shell of the skeleton into the primary concentric spheres and from S. somphozona (Foreman, 1963) in the absence of the main spines. R e m a r k s. The thickness of the poorly differenti ated spongy layer is estimated as the difference in diameter between the external and internal spheres, which is 200-250 μm.…”

Section: Microporosa Aktastensismentioning

confidence: 74%

“…5481) are housed in the Borissiak Paleontological Institute of the Russian Academy of Sciences, Moscow (PIN). The taxonomy of radiolarians follows Afanasieva et al (2005) and Afanasieva and Amon (2006). Morphometric analysis of absolute and relative values of parameters of radi olarian shells from the Paleozoic has shown a regular pattern of changes in the measurements of the skeleton, its parts, and their ratios (Afanasieva, 2000;Afanasieva et al, 2005;Afanasieva and Amon, 2006).…”

Section: Introductionmentioning

confidence: 98%

“…The taxonomy of radiolarians follows Afanasieva et al (2005) and Afanasieva and Amon (2006). Morphometric analysis of absolute and relative values of parameters of radi olarian shells from the Paleozoic has shown a regular pattern of changes in the measurements of the skeleton, its parts, and their ratios (Afanasieva, 2000;Afanasieva et al, 2005;Afanasieva and Amon, 2006). The presence of such stable relationships allows formalization of the process of classification of available data and inclusion of the following terms in the descriptions: "very large, large, small, and very small," which correspond to cer tain ranged quantitative values (Fig.…”

Section: Introductionmentioning

confidence: 99%

“…4. Main absolute and relative morphometric parameters of skeletons of Paleozoic spherical radiolarians (Afanasieva, 2000;Afanasieva et al, 2005;Afanasieva and Amon, 2006). Designations: (D) external sphere diameter; (Ds) internal sphere diameter; (L) main spine length; (wL) width of main spine base; (l) by spine length; (wl) width of by spine base; (dp (ds)) diameters of cells and pores in (dp) external and (ds) internal spheres; (wp (ws)) width of interpore bars and laminate rods: (wp) external and (ws) internal spheres; (wh) thickness of laminate rods; (tw(ts)) wall thickness: (tw) external and (ts) internal spheres; (ht) height of laminate rods, thorns, and thorns-cusps.…”

Section: Introductionmentioning

confidence: 99%

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New radiolarian genera and species from the Lower Permian of the Southern Urals and Northern Mugodzhary

Afanasieva

Amon

2016

Paleontol. J.

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Two new genera and five new species of Lower Permian radiolarians, Arcoclathrata alekseevi gen. et sp. nov., Entactinia pinrasensis sp. nov., Microporosa rozhnovi gen. et sp. nov., M. aktastensis sp. nov., and Somphoentactinia saecularis sp. nov., from the Southern Urals and Northern Mugodzhary are described. The new spherical radiolarian taxa belong to three orders: Entactiniata, Cancelliata, and Spongiata of two classes, Sphaerellaria and Spumellaria.

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Section: Microporosa Aktastensismentioning

confidence: 74%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

New radiolarian genera and species from the Lower Permian of the Southern Urals and Northern Mugodzhary

Afanasieva

Amon

2016

Paleontol. J.

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“…Some have continued to elaborate new higher-level classifications of radiolarians, including hypothesized transformation series for different character states (e.g. Petrushevskaya, 1971;Afanasieva et al, 2005) while other workers have confined their higher-level taxonomy to a relatively small number of families based on clearly distinct Baupläne (e.g. Riedel, 1971).…”

Section: Discussionmentioning

confidence: 99%

The legacy of early radiolarian taxonomists, with a focus on the species published by early German workers

Lazarus

2014

J. Micropalaeontol.

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Abstract. Approximately one-third of the c. 1200 polycystine radiolarian names currently recognized as valid in deep-sea research (Cenozoic sediments and plankton) come from the first century of taxonomic studies (c. 1840–1930). German scientists dominated early research on radiolarian biology and taxonomy. C. G. Ehrenberg’s initial work was followed by E. Haeckel’s mammoth monographic works, particularly his Challenger report. Other important early workers were D. Rüst on Mesozoic and Palaeozoic forms and A. Popofsky on plankton and sediment materials, with smaller contributions by J. Müller, E. Stöhr, F. Dreyer and H. Mast. Excluding Haeckel, these workers together published over 2000 species names. A fraction (5–25%) of these names are still used today in deep-sea research, with a tendency for more prolific authors to have higher modern usage rates. Haeckel’s legacy is different. He published over 5000 species names, but only a few percent are still used. The reasons for his species names no longer being used seem to include both factors common to disuse of names from other early authors (inadequate text descriptions, poor or absent illustration, no preserved original materials) but also due to substantial duplication of species and genus names, created by imposition of a partially artificial high level taxonomy. Based on Haeckel’s own writings and by analogy to other parts of Haeckel’s work, it is suggested that Haeckel’s desire to discover and show evolutionary relationships lay behind this flawed approach to taxonomy.

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