Triphorids (Gastropoda: Triphoridae) from the Upper Eocene of Ukraine

Amitrov, O. V.; Жегалло, Е. А.

doi:10.1134/s003103010704003x

Cited by 5 publications

(3 citation statements)

References 7 publications

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“…Gastropods of the Mandrykivski Layers of the Rybalsky Quarry have been thoroughly surveyed since 1977. The prominent Russian paleontologist O. V. Amitrov emphasized that the Mandrykivsky Complex attracts special attention not only because it exceeds all other well-known paleontological complexes in the richness and integrity of the fauna, but also because according to geographic position, the species composition and age, it is close to typical northern complexes (Latdorf, Tongrian, Chegan), and according to the composition of the families belongs to the intermediate type (Amitrov, 1986(Amitrov, , 1987(Amitrov, , 1996. Amitrov O. V. also considers that the Mandrykivski Layers are characteristic of faster spatial changes in the complexity, indicating that repeat collections in the old location and discoveries of new deposits with the same integrity may extend the lists of the Fauna.…”

Section: Y Makarenkomentioning

confidence: 99%

New data on geology of the Rybalsky Quarry, unique object of geological heritage of Global Significance

Manyuk¹

2021

Journ. Geol., Geogr., and Geoec..

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Among the great variety of geological relics of Ukraine, one of the most attractive is the Rybalsky Quarry, located in the city of Dnipro, and well known outside Ukraine. First of all, it is famous for the Mandrykivski Layers exposed in one of the ridges of the Quarry back in the 1970s, although there are many other important peculiarities of the geological structure of the Quarry which attract scientists from Ukraine, Germany, France, Netherlands, Russia and other countries. There are full data on the history of discovery and survey of the Mandrykivski Layers from their discovery by Valerian Domger in 1882 to current studies that reveal various aspects of geological structure of the Quarry, the results of study of different groups of fossil fauna, compare them with the fauna of the Paris Upper Eocene basin and other well- known locations. Particularly in the Rybalsky Quarry, thanks to the author`s efforts, the Layers received the status of “layers with geographic name”, as confirmed by the decision of Cenozoic Commission of the National Stratigraphic Committee of Ukraine in 2001. New fragments of the section of subaerial and subaqueous deposits of the Quaternary deposits were found and their composition, structure and complete stratigraphic content were studied. The research allows us to consider it typical for the Middle Prydniprovia. Fluvioglacial and lake-glacial deposits of the Dnipro glaciations in the Quarry exposed for the second time in 25 years, but this is the first time when their genetic origin, position in the section and lithological-facies peculiarities were determined. Thick layer of sands embedded on the roof of the Mandrykivski Layers were identified to the fifth or Hadzhybeiska terrace of the Dnipro, in the upper part of which there were notable siliceous-clayey-ferruginous formations or lateral crust (ferruginous crusts). The studies of the layer of brown-green and red-brown clays in the roof of the Mandrykivski layers allows us to presume their marine origin. In this case, they are underwater weathering crust (terra rossa) developed in the process of halmyrolysis or are the product of dissolution of carbonate silt enriched with detritus of mollusks, corals and other inhabitants of the warm Mandrykivske Sea.

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Section: Y Makarenkomentioning

confidence: 99%

New data on geology of the Rybalsky Quarry, unique object of geological heritage of Global Significance

Manyuk¹

2021

Journ. Geol., Geogr., and Geoec..

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“…Only upper Eocene deposits (Obukhov Formation) occur in this locality (Stefanskyi & Stefanska 2015), the lower portion of which is referred to as the Mandrikovka layer. This is a shallow water yellowish grey, detrital, non‐glauconitic clayey sand rich in well‐preserved faunas of foraminifera, corals, molluscs, brachiopods, fish otoliths and rhodoliths (Müller & Rozenberg 2003; Amitrov & Zhegallo 2007; Armitrov 2008; Berezovsky 2014, 2015; Sirenko & Dell’Angelo 2015; Bitner & Müller 2017). Overlying this unit are dark grey–green and brown silty sands and clays, often glauconitic and very rich in siliceous sponge spicules and fragments of lithistid sponges (Berezovsky 2015; Stefanskyi & Stefanska 2015).…”

Section: Geological Settingmentioning

confidence: 99%

High diversity of siliceous sponges in Western Tethyan areas during the Eocene: palaeobiogeographical, ecological and taxonomic significance

Łukowiak

Pisera

Stefanska

et al. 2021

Papers in Palaeontology

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Porifera is a clade of globally distributed, early diverging metazoans that are important components of modern aquatic environments. Despite the fact that they were also abundant in the geological past, their fossil record is uneven. For example, little is known about sponge communities that inhabited the Tethyan areas during the Cenozoic. Here, we record an abundant and taxonomically diverse assemblage of middle–late Eocene sponges from east‐central Ukraine. The material consists of preserved whole‐body specimens as well as disassociated spicules. The taxonomic composition of this new assemblage, supplemented with previously published data obtained from sponge materials originating from the middle and upper Eocene of the East European Platform, documents a surprisingly rich sponge community that inhabited shallow waters (depths of 100 m) and comprised at least 30 demosponge species, including two new taxa, Paratetilla milanek Łukowiak and Theonella alexandriae Łukowiak, three hexactinellids and a single homoscleromorph. Additionally, we report the first fossil occurrence of Vetulina, a demosponge genus that currently is found near the Philippines and Australia and in the Caribbean Sea. Some of the sponge taxa recognized were previously noted from the upper Eocene of Australia and New Zealand. This is indicative of their wide distribution during the early Cenozoic and also shows that a non‐interrupted connection existed between the western Tethyan and peri‐Australian areas, explaining the patchy distribution of some sponge taxa in modern seas.

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“…Sinezona malloryi (Squires & Goedert, 1996) from middle early Eocene rocks in Washington has a distinct constriction of the base below the selenizone, and the suture is above the periphery of the previous whorl. Sinezona cupelliformis (Amitrov, 1996) from Eocene strata of Ukraine has many more axials. Scissurella aliceae Schnetler, Lozouet & Pacaud, 2001, from Paleocene rocks in Denmark has a sunken protoconch, a much wider selenizone, and stronger spiral sculpture on the shoulder.…”

mentioning

confidence: 99%

Scissurella nesbittae, new species, from the Gries Ranch Formation, Lewis County, Washington State (Gastropoda: Vetigastropoda: Scissurellidae)

Geiger

Goedert

2020

Zootaxa

672

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Triphorids (Gastropoda: Triphoridae) from the Upper Eocene of Ukraine

Cited by 5 publications

References 7 publications

New data on geology of the Rybalsky Quarry, unique object of geological heritage of Global Significance

New data on geology of the Rybalsky Quarry, unique object of geological heritage of Global Significance

High diversity of siliceous sponges in Western Tethyan areas during the Eocene: palaeobiogeographical, ecological and taxonomic significance

Scissurella nesbittae, new species, from the Gries Ranch Formation, Lewis County, Washington State (Gastropoda: Vetigastropoda: Scissurellidae)

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