Fossil Margaritifera of Moldavia and southwestern Ukraine

Chepalyga, A. L.

doi:10.1080/00206816509474246

Cited by 8 publications

(23 citation statements)

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“…Pliocene to Pleistocene heavy‐shelled Pseudunio ‐type margaritiferids are reported from Austria eastward to Ukraine (e.g. Chepalyga ; Schultz ); most of the various species‐level names established are likely synonyms of Margaritifera flabellatiformis (Grigorovič‐Berezovskij, 1915). With regard to general shell shape, size and hinge dentition, the latter two species are close to the extant Margaritifera auricularia .…”

Section: Discussionmentioning

confidence: 99%

“…The origin and fossil record of Margaritiferidae Fossil Margaritiferidae have been reported from North America, Europe, North Africa and Central and East Asia (e.g. Mongin 1963;Chepalyga 1965;Modell 1931Modell , 1935Modell , 1957Modell , 1958Modell , 1964Starobogatov 1970;Liu 1981;Delvene & Araujo 2009;Fang et al 2009;Schneider & Prieto 2011;Grimm et al 2012;Bolotov et al 2015;Van Damme et al 2015). The earliest material that has been assigned to Margaritiferidae comes from the Upper Triassic of southern China (Liu 1981;Fang et al 2009;Van Damme et al 2015).…”

Section: Recent Margaritiferidaementioning

confidence: 99%

“…Cenozoic fossil Margaritiferidae are widespread in Europe and occur scattered in North America (e.g. Chepalyga 1965;Schneider & Prieto 2011;Van Damme et al 2015).…”

Section: Recent Margaritiferidaementioning

confidence: 99%

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The origin and phylogeny of Margaritiferidae (Bivalvia, Unionoida): a synthesis of molecular and fossil data

Araújo

Schneider²,

Roe

et al. 2016

Zoologica Scripta

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The family Margaritiferidae is a small but widely distributed group within the Unionoida, or freshwater mussels, whose taxonomy and systematics has been the subject of numerous publications. Despite several efforts, there is no consensus on which characters reliably diagnose this family. Herein, we present the results of a phylogenetic analysis of the most comprehensive data set for Margaritiferidae in terms of taxa and phylogenetic markers assembled to date, including eleven out of the twelve margaritiferid species currently considered valid. In addition, we review the fossil record of the family and attempt to integrate fossil and DNA sequence data to provide a diagnosis of Margaritiferidae, identify its origin and biogeographic patterns, and determine the systematic relationships of its constituent species and their taxonomic affinities. We assembled a molecular data set comprised of five markers: COI, 16S, 28S, 18S and histone 3 for a total of 59 specimens representing eleven species of Margaritifera. Our results indicate that the family Margaritiferidae is a monophyletic group comprised of the single genus Margaritifera, which includes the following 12 species: M. dahurica, M. margaritifera, M. monodonta, M. middendorffi, M. laevis, M. marrianae, M. hembeli, M. falcata, M. laosensis, M. auricularia and M. marocana plus the unstudied M. homsensis. Estimates of divergence times using fossil calibrations or mean substitution rates produced dramatically different results. Divergence estimates based on the fossil calibrations were 10 times higher than those obtained applying the mean substitution rates. The current distribution of the family implies dispersal across marine or brackish waters by their host fish, leaving a fossil record on four continents that dates to the Mesozoic. Margaritiferidae appear to be derived from putative ancestor in the Silesunionidae, with a likely origin in Asia. We suggest that Margaritiferidae had spread along the Tethys margins and crossed the Atlantic already in the Late Triassic or Early Jurassic. Further dispersal events, in the Late Cretaceous or Eocene, may be linked to salinity‐depleted coastal waters or freshwater layering.

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Section: Discussionmentioning

confidence: 99%

Section: Recent Margaritiferidaementioning

confidence: 99%

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The origin and phylogeny of Margaritiferidae (Bivalvia, Unionoida): a synthesis of molecular and fossil data

Araújo

Schneider²,

Roe

et al. 2016

Zoologica Scripta

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“…Numerous fossil nominal taxa of freshwater pearl mussels (Bivalvia: Unionoida: Margaritiferidae) were introduced by paleontologists based on the differences in shell shape, size, umbo position, shape of adductor scars, and hinge structure (Bogatchev, 1961;Chepalyga, 1964Chepalyga, , 1965Chepalyga, , 1967Devyatkin et al, 1971). However, recent advances in phylogenetic and phylogenomic modeling (Bolotov et al, 2016;Araujo et al, 2017;Lopes-Lima et al, 2018) indicate that these mussels share slow evolutionary and diversification rates.…”

Section: Introductionmentioning

confidence: 99%

“…Almost all recent species have strictly allopatric distribution ranges, with the only exception of Margaritifera middendorffi (Rosén, 1926) and M. laevis (Haas, 1910) having a secondary sympatric zone in the Sakhalin Island, South Kurile Archipelago, and Hokkaido (Bolotov et al, 2015(Bolotov et al, , 2016Lopes-Lima et al, 2018). In contrast, a description of fossil sympatric taxa is a commonly accepted approach in systematic paleontology, when 2-3 or more closely related species are described from a single locality (Chepalyga, 1964;Devyatkin et al, 1971;Delvene et al, 2016) that may lead to overestimation of the actual diversity of fossil taxa because the sympatric occurrence of closely related species is an unusual phenomenon (Lopes-Lima et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

A Taxonomic Revision of Fossil Freshwater Pearl Mussels (Bivalvia: Unionoida: Margaritiferidae) From Pliocene and Pleistocene Deposits of Southeastern Europe

et al. 2019

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Margaritiferidae is an ancient freshwater bivalve family originated in the Jurassic in East Asia. Here, we revise several nominal taxa of fossil freshwater pearl mussels that were recovered from the Upper Pliocene and Pleistocene deposits of the Dniester and Prut river valleys. Based on morphological and stratigraphic data, we found that these nominal taxa belong to the genus Pseudunio and are junior synonyms of P. flabellatiformis (Grigorowitch-Beresowski, 1915). The new synonymy is proposed as follows: Margaritifera (Pseudunio) moldavica Chepalyga, 1964 syn. nov., Margaritifera (Pseudunio) robusta robusta Chepalyga, 1964 syn. nov., Margaritifera (Pseudunio) robusta speensis Chepalyga, 1964 syn. nov., and Margaritifera (Pseudunio) robusta tirassica Chepalyga, 1964 syn. nov. All these fossil nominal taxa were described based on minor differences in the shell shape and size, hinge structure, and stratigraphic position. Finally, we suggest an updated phylogenetic scheme of the genus Pseudunio, which contains five valid species: P. marocanus (Pallary, 1918) [Eocene – Recent, Morocco], P. auricularius (Spengler, 1793) [Pliocene – Recent, Southern and Western Europe], P. homsensis (Lea, 1865) [Pliocene – Recent, Orontes and Nahr al-Kabir basins], P. flabellatiformis (Grigorowitch-Beresowski, 1915) comb. rev. [Pliocene – Late Pleistocene, paleo-Dniester and paleo-Danube basins, an extinct lineage related to P. auricularius and P. homsensis], and P. flabellatus (Goldfuss, 1837) comb. rev. [Miocene, paleo-Danube Basin, a stem lineage, MRCA of P. auricularius - P. homsensis clade].

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A reappraisal of the type series of the early Cretaceous margaritiferid ‘Unio’ valdensis Mantell, 1844

Delvene

Munt

2020

Proceedings of the Geologists' Association

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Fossil Margaritifera of Moldavia and southwestern Ukraine

Cited by 8 publications

References 0 publications

The origin and phylogeny of Margaritiferidae (Bivalvia, Unionoida): a synthesis of molecular and fossil data

The origin and phylogeny of Margaritiferidae (Bivalvia, Unionoida): a synthesis of molecular and fossil data

A Taxonomic Revision of Fossil Freshwater Pearl Mussels (Bivalvia: Unionoida: Margaritiferidae) From Pliocene and Pleistocene Deposits of Southeastern Europe

A reappraisal of the type series of the early Cretaceous margaritiferid ‘Unio’ valdensis Mantell, 1844

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