Evolution of the Permian family Spirolegoceratidae (Goniatitida, Ammonoidea)

Леонова, Т. Б.; Shilovsky, O. P.

doi:10.1134/s0031030107010030

Cited by 10 publications

(3 citation statements)

References 2 publications

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“…Evidence for an age in the Roadian is stronger, demarcated by presence of ammonites such as Sverdrupites harkeri and S. amundseni (Lozovsky et al, 2009). These ammonites, and associated conodonts Kamagnathus khalimbadzhai and K. volgensis, correlate globally to the Roadian (Barskov et al, 2014;Leonova, 2007;Leonova and Shilovsky, 2007). The upper boundary of the Roadian is 268.8 Ma ± 0.5 Myr, so a minimum age is 268.3 Ma.…”

Section: Age Justificationmentioning

confidence: 87%

Fossil Calibrations for the Arthropod Tree of Life

Wolfe

Daley

Legg³

et al. 2016

Preprint

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Fossil age data and molecular sequences are increasingly combined to establish a timescale for the Tree of Life. Arthropods, as the most species-rich and morphologically disparate animal phylum, have received substantial attention, particularly with regard to questions such as the timing of habitat shifts (e.g., terrestrialisation), genome evolution (e.g., gene family duplication and functional evolution), origins of novel characters and behaviours (e.g., wings and flight, venom, silk), biogeography, rate of diversification (e.g., Cambrian explosion, insect coevolution with angiosperms, evolution of crab body plans), and the evolution of arthropod microbiomes. We present herein a series of rigorously vetted calibration fossils for arthropod evolutionary history, taking into account recently published guidelines for best practice in fossil calibration. These are restricted to Palaeozoic and Mesozoic fossils, no deeper than ordinal taxonomic level, nonetheless resulting in 79 fossil calibrations for 101 clades. This work is especially timely owing to the rapid growth of molecular sequence data and the fact that many included fossils have been described within the last five years. This contribution provides a resource for systematists and other biologists interested in deep-time questions in arthropod evolution.

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Section: Age Justificationmentioning

confidence: 87%

Fossil Calibrations for the Arthropod Tree of Life

Wolfe

Daley

Legg³

et al. 2016

Preprint

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“…The lower part of the Yulegir Fm in the Pravaya Galochka Creek (Figure 12) contains bivalves Myonia kutygini Biakov, the type specimens of which occur with the ammonoids Tumarioceras kashirzevi Andrianov in the Orol Fm of adjacent basins (Figure 10) [91,92]. This confirms that the lower part of Yulegir Fm belongs to the Lower Tumarian (lower Kungurian) regional substage (Figure 10) characterised by a rich assemblage of Kungurian ammonoids in the nearby Kuranakh basin [36,93,94].…”

Section: Kobycha Basinmentioning

confidence: 57%

Radioisotopic U-pb Dating of the Kolchugino Group Basement (Kuznetsk Coal Basin, Siberia): Was the Change of Early-Middle Permian Floras Simultaneous at Different Latitudes in Angaraland?

Silantiev,

Gutak,

Tichomirowa

et al. 2023

Preprint

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The Kuznetsk Basin (Kuzbass) is one of the largest coal basins in Siberia and a reference area for the ancient Angaraland continent. The proximity of the Kuzbass and Siberian platform caused their biotic similarities in the Late Palaeozoic. However, due to biota endemism, the Kuzbass Upper Palaeozoic does not correlate directly with the International Chronostratigraphic Chart (ICC). This paper discusses radioisotopic (CA-ID-TIMS) dating of zircons from a volcanic tuff located in the Starokuznetsk Formation. This level matches the interval of the Balakhonka/Kolchugino (B/K) floral change in Kuzbass, i.e. the gradual replacement of cordaitoid-dominated wet forests (Balakhonka flora) by more arid fern-pteridosperm-cordaitoid assemblages (Kolchugino flora). New age (276.9 ± 0.4 Ma) directly correlates the Starokuznetsk Fm with the Upper Kungurian of the ICS. We compared the Kuzbass data with data of the Western Verkhoyanie, where Middle Permian ammonoids (Sverdrupites assemblage) occur in strata recording the B/K floral change. Available (ICC) and new datings indicate the lag between the B/K floral change in low (Kuzbass) and high (Verkhoyanie) latitudes of Angaraland. The B/K floral change in the Kuzbass began in the early Late Kungurian and was completed by the end of this age. In contrast, the B/K floral change in Verkhoyanie began at the end of the Late Kungurian and was completed in the Late Wordian. The delay in the floral changes at different latitudes of Angaraland suggests that existing interregional correlations need further improvement.

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“…7). The ammonoid assemblage dates the reef mounds as Roadian (Middle Permian) (Leonova, 2006(Leonova, , 2010Leonova and Shilovsky, 2007;Leonova et al, 2002Leonova et al, , 2005Barskov et al, 2014). The next, thoroughly sampled locality in the Kre meshki section no.…”

Section: Introductionmentioning

confidence: 99%

Upper Kazanian (Middle Permian) gastropods of the Volga–Urals Region

Мазаев

2015

Paleontol. J.

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Evolution of the Permian family Spirolegoceratidae (Goniatitida, Ammonoidea)

Cited by 10 publications

References 2 publications

Fossil Calibrations for the Arthropod Tree of Life

Fossil Calibrations for the Arthropod Tree of Life

Radioisotopic U-pb Dating of the Kolchugino Group Basement (Kuznetsk Coal Basin, Siberia): Was the Change of Early-Middle Permian Floras Simultaneous at Different Latitudes in Angaraland?

Upper Kazanian (Middle Permian) gastropods of the Volga–Urals Region

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