The Middle Devonian acanthodian assemblage of the Karksi outcrop in Estonia; pp. 96–111

Pinakhina, Daria; Märss, Tiiu

doi:10.3176/earth.2018.07

Cited by 5 publications

(6 citation statements)

References 11 publications

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“…3M) from the Stolin Beds. The species is morphologically similar to Nostolepis kernavensis with N. gaujensis having slightly lower and blunter ridges, and wider and shallower troughs between the ridges (Pinakhina and Märss 2018). In the original description by Valiukevičius (1998) the figures are small and indistinct.…”

Section: Polotsk Regional Stagementioning

confidence: 86%

“…Ginkgolepis talimae was originally placed in the genus Cheiracanthus Agassiz, 1835 when the species was erected by Valiukevičius (1985) for scales from the Eifelian Narva Regional Stage of the Baltic Region. The species was later placed in the newly erected genus Gingkolepis by Pinakhina and Märss (2018). Whilst G. talimae has been listed as present in the Kostyukovichi Regional Stage (e.g., Valiukevičius and Kruchek 2000), this article is the first in which specimens from this stage have been figured.…”

Section: Kostyukovichi Regional Stagementioning

confidence: 93%

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Acta Geologica Polonica

Plax

Newman²

2020

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The Lower Devonian (Emsian) and Middle Devonian of Belarus contain assemblages of biostratigraphically useful faunal and floral microremains. Surface deposits are few, with most material being derived from borehole cores. Acanthodian scales are particularly numerous and comparison with scales from other regions of the Old Red Sandstone continent (Laurussia), specifically the Orcadian Basin of Scotland, the Baltic Region, Spitsbergen, and Severnaya Zemlya have demonstrated a lot of synonymy of acanthodian species between these areas. This is especially the case between Belarus, the Orcadian Basin and the Baltic Region, which has allowed us to produce an interregional biostratigraphic scheme, as well as to postulate marine connection routes between these areas. The acanthodian biostratigraphy of Belarus is particularly important as it is associated with spores and marine invertebrates, so giving the potential of more detailed correlations across not only the Old Red Sandstone continent, but elsewhere in the Devonian world. We also demonstrate that differences in preservation (e.g., wear and how articulated a specimen is) is one of the main reasons for synonymy.

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Section: Polotsk Regional Stagementioning

confidence: 86%

Section: Kostyukovichi Regional Stagementioning

confidence: 93%

Acta Geologica Polonica

Plax

Newman²

2020

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“…N. musca and N. terraborea were found in the beds from the Ludlow to Pridoli, and the earliest records of N. consueta, N. tewonensis, N. gracilis and N. striata are back to the Wenlock (Denison, 1979;Gagnier, Jahnke & Shi, 1989;Wang & Dong, 1989;Wang et al, 1998;Wang, 2003;Valiukevičius, 2003a;Valiukevičius, 2004a;Valiukevičius, 2005;Burrow, 2013;Turner & Burrow, 2018;Wang et al, 2018). N. kernavensis and N. gaujensis are the only taxa from the Middle Devonian and Upper Devonian (Valiukevičius, 1985;Burrow, Janvier & Villarroel, 2003;Plax, 2011;Pinakhina & Märss, 2018). N. striata from many Silurian sites illustrates that it migrated widely (Pander, 1856;Fredholm, 1988;Märss, 1997;Burrow, 2013).…”

Section: Discussionmentioning

confidence: 99%

“…N. striata is a cosmopolitan species, also described from the Laurentia and Australia blocks (Babin et al 1976;Denison, 1979;Mader, 1986;Valiukevičius, 2005;Burrow et al, 2013;Plax, 2015;Turner & Burrow, 2018). Some other Nostolepis species, i.e., N. alifera, N. alta, N. elegans, N. costata, N. robusta, N. magnicostata, N. minima, N. gaujensis, N. latvica, N. kozhymica, N. parathleta, N. taimyrica, N. terraborea and N. linleyensis were also recorded in the Baltica Block, but none of them has been reported in China (Valiukevičius, 1994;Miller & Märss, 1999;Valiukevičius, 2003b;Valiukevičius, 2005;Turner et al, 2017;Pinakhina & Märss, 2018). N.…”

Section: Discussionmentioning

confidence: 99%

Nostolepisscale remains (stem Chondrichthyes) from the Lower Devonian of Qujing, Yunnan, China

Cui

Andreev

et al. 2021

PeerJ

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Based initially on microfossils, Nostolepis is one of the first known ‘acanthodians’, which constitute a paraphyletic assemblage of plesiomorphic members of the total group Chondrichthyes. Its wide distribution has potential implications for stratigraphic comparisons worldwide. Six species of Nostolepis have been reported in China, including one species from the Xitun Formation (Lochkovian, Lower Devonian) of Qujing, eastern Yunnan. Acid preparation of rock samples from the Xitun Formation has yielded abundant acanthodian remains. Based on both morphological and histological examinations, here we identify five species of Nostolepis, including two new species. N. qujingensis sp. nov. is characterized by thin scales devoid of the neck anteriorly and the dentine tubules rarely present in the anterior part of the crown. N. digitus sp. nov. is characterized by parallel ridges on anterior and lateral margins of the crown, and the neck constricted and ornamented with pore openings. We extend the duration of N. striata in China from the Pridoli of Silurian (Yulungssu Formation) to the Lower Devonian in Qujing and report the first occurrences of N. amplifica and N. consueta in this region. This study increases the diversity of the Lower Devonian Xitun Fauna and provides a better understanding of the paleogeographic distribution of Nostolepis.

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“…Thin sections were prepared at the PIN following the method described by D.V. Pinakhina (Glinskiy & Pinakhina 2018;Pinakhina & M€ arss 2018): glass slides with a small amount of glass-filled thermoplastic (for 3D printing) were heated on a hot plate until the thermoplastic started melting. The fossil material was placed in a melted thermoplastic drop and manipulated with a needle under the microscope to correctly orient the sample.…”

Section: Methodsmentioning

confidence: 99%

Early ray‐finned herbivores: the dental system of Eurynotoidiidae (Actinopterygii; middle–late Permian, European Russia) and implications for palaeobiology and palaeoecology

Bakaev,

Bulanov,

Kogan

et al. 2024

Palaeontology

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Eurynotoidiformes are a little‐known group of actinopterygian fishes from the Permian of European Russia, characterized by the possession of multicuspid marginal teeth arranged in a single row. Morphologically, the teeth resemble those of Recent Cichlidae, Acanthuridae, Siganidae or Serrasalmidae, suggesting similar trophic adaptations related to herbivory. Tooth histology is similar to the majority of basal actinopterygians (composed of dentine, acrodin and collar enamel). Teeth are ankylosed in their attachment, and labial pleurodont in implantation, strengthening the tooth. The multicuspid tooth crowns derive from conical teeth of predatory or omnivorous ancestors, analogous to the evolution of multicuspid teeth in cichlid fishes. Tooth replacement in eurynotoidiforms is most comparable to an alternating pattern, with a possible simultaneous, unilateral replacement occurring in the whole jaw, similar to characiform fishes. Replacement teeth were formed extraosseously. Teeth of the inner dental arcade were conical. Based on comparisons with the teeth of extant actinopterygians specialized for herbivory, along with functional morphological analysis and consideration of wear patterns, we hypothesize that eurynotoidiforms represent the oldest known actinopterygians specialized for herbivory. Several strategies of herbivory in Recent actinopterygians were already realized by eurynotoidiforms as early as the Late Palaeozoic (middle and late Permian): grazing/cutting filamentous algae (Lapkosubia spp., Isadia suchonensis), browsing/biting off macrophyte fragments (Isadia aristoviensis), scraping/harvesting periphyton from hard substrates (Isadia opokiensis, I. arefievi). However, notable morphological differences in the jaws (elongate) and tooth arrangement (homodont along the jaw, functional teeth separated) suggest that this Permian experiment in herbivory followed different pathways compared to extant taxa.

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The Middle Devonian acanthodian assemblage of the Karksi outcrop in Estonia; pp. 96–111

Cited by 5 publications

References 11 publications

Acta Geologica Polonica

Acta Geologica Polonica

Nostolepisscale remains (stem Chondrichthyes) from the Lower Devonian of Qujing, Yunnan, China

Early ray‐finned herbivores: the dental system of Eurynotoidiidae (Actinopterygii; middle–late Permian, European Russia) and implications for palaeobiology and palaeoecology

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