scholarly journals Baltic Ordovician compound sponges as erratics on Gotland (Sweden), in northern Germany and the eastern Netherlands

2007 ◽  
Vol 86 (4) ◽  
pp. 365-378 ◽  
Author(s):  
F. Rhebergen
Keyword(s):  
New Species ◽  
Western Europe ◽  
Middle Miocene ◽  
River System ◽  
Early Pleistocene ◽  
Form Part ◽  
New Material ◽  
Early Palaeozoic ◽  
The Baltic ◽  
Baltic Area

AbstractCompound orchocladine sponges are unusual in the Early Palaeozoic. In Europe, silicified material of Late Ordovician age has hitherto been referred to as Aulocopium aurantium Oswald, 1847 and the invalid Aulocopium compositium Conwentz, 1905. An examination of new material has resulted in the recognition of a new genus, Hydraspongia, with two new species, H. polycephala and H. erecta, and a third new species, Perissocoelia megahabra, to which most specimens can now be assigned. These taxa form part of rich erratic sponge assemblages, which originate from unknown source areas in the Baltic, and have been collected in northern and western Europe from fluvial sandy deposits of the Eridanos River system, which drained the Baltic area from the Middle Miocene to Early Pleistocene.

The brachiopods Alwynella and Grorudia: homeomorphic plectambonitoids in the Middle and Upper Ordovician of Baltoscandia

2007 ◽  
Vol 98 (3-4) ◽  
pp. 271-280 ◽  
Author(s):  
Linda Hints ◽  
David A. T. Harper
Keyword(s):  
New Species ◽  
Baltic Sea ◽  
Late Ordovician ◽  
Drill Core ◽  
Upper Ordovician ◽  
The Baltic Sea ◽  
New Material ◽  
The Baltic ◽  
A New Species ◽  
Water Facies

ABSTRACTTwo Ordovician plectambonitoid genera, Alwynella and Grorudia, occur in drill core sections of Latvia in the East Baltic, and in exposures and loose blocks on the Swedish Island of Öland in the Baltic Sea. The new material confirms differences between the two taxa that are assigned herein to separate families, Alwynellidae fam. nov. and Grorudiidae Cocks & Rong, 1989. In particular, the undercut cardinalia separates Alwynella from Grorudia and indicates its proximity to the sowerbyellids. The genus Grorudia, which is externally similar to Alwynella, is more closely related to the palaeostrophomenines. A new species Grorudia morrisoni sp. nov. is established in the East Baltic. The specimens from Öland are included tentatively within the genus Grorudia due to lack of interiors. Both Alwynella and Grorudia were confined to deeper-water facies in the Baltic palaeobasin, within successions ranging in age from latest Mid (late Llanvirn) to earliest Late Ordovician (mid Caradoc).

scholarly journals The debated question of asymmetrical rhynchonellids (Brachiopoda, Rhynchonellida): examples from the Late Cretaceous of Western Europe

2020 ◽  
Vol 191 ◽  
pp. 1
Author(s):  
Danièle Gaspard ◽  
Sylvain Charbonnier
Keyword(s):  
New Species ◽  
Late Cretaceous ◽  
Western Europe ◽  
Anterior Margin ◽  
Morphological Diversity ◽  
New Genera ◽  
New Material ◽  
A New Species ◽  
Se France ◽  
Sw France

Many Cretaceous asymmetrical rhynchonellid brachiopods (Brachiopoda, Rhynchonellida) have long been considered as Rhynchonella difformis (Valenciennes in Lamarck, 1819). After a revision, Owen (1962) included the Cenomanian specimens from Europe in Cyclothyris M’Coy, 1844. Later, Manceñido et al. (2002) confirmed this decision and critically mentioned the name of another asymmetrical rhynchonellid genus from Spain, Owenirhynchia Calzada in Calzada and Pocovi, 1980. Specimens with an asymmetrical anterior margin (non particularly ecophenotypical), from the Late Coniacian and the Santonian of Les Corbières (Aude, France) and Basse-Provence (SE France) are here compared to specimens of the original Cenomanian species C. difformis. They are also compared to new material from the Northern Castilian Platform (Coniacian-Santonian, N Spain) and to Rhynchonella globata Arnaud, 1877 (Campanian, Les Charentes, Dordogne, SW France) and Rh. vesicularis Coquand, 1860 (Campanian, Charente, SW France). These observations document the great morphological diversity among all these species and lead us to erect a new species: Cyclothyris grimargina nov. sp. from the type material of Arnaud, and two new genera: Contortithyris nov. gen. including Contortithyris thermae nov. sp., Beaussetithyris nov. gen. including Beaussetithyris asymmetrica nov. sp. All of these brachiopods fundamentally present an asymmetrical state which origin is discussed.

scholarly journals Turtles of the genus Sakya (Geoemydidae): new material from the late Miocene of Russia and Ukraine, new taxonomic diversity and expansion of the stratigraphic range

2015 ◽  
Author(s):  
Elena Syromyatnikova ◽  
Igor Danilov
Keyword(s):  
New Species ◽  
Eastern Europe ◽  
Late Miocene ◽  
Posterior Part ◽  
Detailed Comparison ◽  
Early Pleistocene ◽  
Phylogenetic Position ◽  
Published Data ◽  
Two New Species ◽  
New Material

Background. Sakya Bogachev, 1960 is a genus of geoemydid turtles with unusual scalation of the carapace consisting of 9–10 vertebrals and 8–10 pairs of pleurals. It is known from Neogene localities of Eastern Europe and includes two species: Sakya riabinini (Khosatzky, 1946) (= S. pontica Bogachev, 1960), from the late Miocene (MN13) to early Pleistocene of Eastern Europe (Moldova, Romania, Russia, and Ukraine) and Sakya kolakovskii Chkhikvadze, 1968 from the Pliocene of Abkhazia. Attribution of Melanochelys etuliensis Khosatzky and Redkozubov, 1986 from the early Pliocene of Moldova to Sakya is poorly corroborated. Here we report new material of Sakya from the late Miocene of Russia and Ukraine, which, probably, belongs to one or two new species of this genus and expands its stratigraphic distribution. Methods. We examined new material of Sakya, that includes posterior part of carapace and incomplete plastron from Morskaya 2 locality (MN 13, Rostov Province, Russia), incomplete carapace and plastron from Egorovka locality (MN 12, Odessa Province, Ukraine), and fragmentary shell remains from Fortepianka locality (MN 11, Republic of Adygea, Russia). For comparison we used published data and personal observations on other specimens of Sakya. Results. The specimens from Morskaya 2 and Egorovka are assigned to Sakya based on the presence of increased number of vertebrals and pleurals. Both specimens differ from the described species of Sakya by reduced number of vertebrals (seven in the Morskaya 2 specimen, and five in the Egorovka specimen), and extension of the posteriormost vertebral onto pygal. In addition, they differ from S. riabinini in the presence of eight neurals, longer than wide pleurals, and from S. kolakovskii in the presence of two suprapygals and serrated posterior edge of the carapace. The material from Fortepianka is too fragmentary for detailed comparison, but also differs from S. riabinini in the reduced number of vertebrals. Discussion. The reported material may represent one or two new species of Sakya. The reduced number of vertebrals in these forms probably represents a primitive condition, whereas the extension of the posteriormost vertebral onto the pygal may be a synapomorphy, which unites the new forms. Thus, the Morskaya 2 and Egorovka specimens of Sakya may represent a separate primitive lineage of this genus. In this case, S. kolakovskii and S. riabinini form a more advanced clade with increased number of carapacial scales. These issues as well as phylogenetic position of Sakya within Geoemydidae will be checked by future phylogenetic analysis. The Sakya material from Fortepianka (MN11, late Sarmatian) represents the earliest reliable record of this genus, known previously beginning from MN 12 (Meotic).

SILURIAN STROMATOPOROIDS OF THE MATAPEDIA–TEMISCOUATA AREA, QUEBEC

1966 ◽  
Vol 3 (1) ◽  
pp. 31-48 ◽  
Author(s):  
Colin W. Stearn ◽  
Claude Hubert
Keyword(s):  
New Species ◽  
North America ◽  
Great Lakes ◽  
Close Connection ◽  
Northern Europe ◽  
Great Lakes Region ◽  
Widespread Species ◽  
The Baltic ◽  
Baltic Area ◽  
A New Species

Stromatoporoids are abundant in parts of the Sayabec, St. Leon, and Mont Wissick formations of Wenlock and Ludlow age in eastern Quebec, Canada. The fauna is a mixture of species from Wenlock strata of northern Europe, the Wenlock and Ludlow beds of Baie des Chaleurs, Quebec, and Niagaran rocks of the Great Lakes region. Clathrodictyon crickmayi and Stromatopora prima show the affinity of the fauna to that described by Parka from Baie des Chaleurs. Densastroma astroites indicates a close connection of the fauna with the rocks of Wenlock age in England and the Baltic area. Stromatopora antiqua shows the affinity of the fauna to that of central North America. Ecclimadictyon fastigiatum is a widespread species in all these regions. A new species of Actinodictyon (A. quebecense) is described. Two unnamed species of Stromatopora and Clathrodictyon cf. podolica make up the rest of the fauna.

Taxonomic status of some species of Aspidostomatidae (Bryozoa, Cheilostomata) from the Oligocene and Miocene of Patagonia (Argentina)

2018 ◽  
Vol 92 (3) ◽  
pp. 432-441 ◽  
Author(s):  
Leandro M. Pérez ◽  
Juan López-Gappa ◽  
Miguel Griffin
Keyword(s):  
New Species ◽  
Fossil Record ◽  
Type Species ◽  
Middle Miocene ◽  
Taxonomic Status ◽  
Early Miocene ◽  
New Combination ◽  
Late Oligocene ◽  
Santa Cruz ◽  
New Material

AbstractThe bryozoan genus Aspidostoma Hincks, 1881 has been regarded as the only representative of the Aspidostomatidae Jullien, 1888 in Argentina to date. Its type species, Aspidostoma giganteum (Busk, 1854), is presently distributed in the Magellanic Region (Argentina and Chile) and has been recorded in Oligocene and Miocene fossil deposits of Santa Cruz and Chubut, respectively. New material from San Julián (late Oligocene), Monte León (early Miocene), Chenque (early to middle Miocene), and Puerto Madryn (late Miocene) formations suggests, however, that A. giganteum is not represented in the fossil record. Material from Puerto Madryn Formation previously regarded as A. giganteum is here recognized as Aspidostoma roveretoi new species. Aspidostoma ortmanni Canu, 1904 is revalidated for the species from the San Julián Formation. Aspidostoma armatum new species and Aspidostoma tehuelche new species are introduced for material from the Monte León and Chenque formations, respectively. Aspidostoma incrustans Canu, 1908, from the early Miocene, is redescribed. Melychocella Gordon and Taylor, 1999, which differs from Aspidostoma in having vicarious avicularia and lacking a median ridge and a quadrangular process proximal to the opesia-orifice, is so far represented by three Paleogene species from the Chatham Islands (Southwest Pacific). The material from Monte León allowed us to transfer Aspidostoma flammulum Canu, 1908 to Melychocella, resulting in the new combination Melychocella flammula (Canu, 1908). Melychocella biperforata new species is described from the lower Miocene Monte León and Chenque formations. The presence of Melychocella in the Neogene of Patagonia extends its geographic distribution and its temporal range.UUID: http://zoobank.org/d84df2d8-cab2-4e74-82b8-7c67d938a58f

scholarly journals Turtles of the genus Sakya (Geoemydidae): new material from the late Miocene of Russia and Ukraine, new taxonomic diversity and expansion of the stratigraphic range

2015 ◽  
Author(s):  
Elena Syromyatnikova ◽  
Igor Danilov
Keyword(s):  
New Species ◽  
Eastern Europe ◽  
Late Miocene ◽  
Posterior Part ◽  
Detailed Comparison ◽  
Early Pleistocene ◽  
Phylogenetic Position ◽  
Published Data ◽  
Two New Species ◽  
New Material

Background. Sakya Bogachev, 1960 is a genus of geoemydid turtles with unusual scalation of the carapace consisting of 9–10 vertebrals and 8–10 pairs of pleurals. It is known from Neogene localities of Eastern Europe and includes two species: Sakya riabinini (Khosatzky, 1946) (= S. pontica Bogachev, 1960), from the late Miocene (MN13) to early Pleistocene of Eastern Europe (Moldova, Romania, Russia, and Ukraine) and Sakya kolakovskii Chkhikvadze, 1968 from the Pliocene of Abkhazia. Attribution of Melanochelys etuliensis Khosatzky and Redkozubov, 1986 from the early Pliocene of Moldova to Sakya is poorly corroborated. Here we report new material of Sakya from the late Miocene of Russia and Ukraine, which, probably, belongs to one or two new species of this genus and expands its stratigraphic distribution. Methods. We examined new material of Sakya, that includes posterior part of carapace and incomplete plastron from Morskaya 2 locality (MN 13, Rostov Province, Russia), incomplete carapace and plastron from Egorovka locality (MN 12, Odessa Province, Ukraine), and fragmentary shell remains from Fortepianka locality (MN 11, Republic of Adygea, Russia). For comparison we used published data and personal observations on other specimens of Sakya. Results. The specimens from Morskaya 2 and Egorovka are assigned to Sakya based on the presence of increased number of vertebrals and pleurals. Both specimens differ from the described species of Sakya by reduced number of vertebrals (seven in the Morskaya 2 specimen, and five in the Egorovka specimen), and extension of the posteriormost vertebral onto pygal. In addition, they differ from S. riabinini in the presence of eight neurals, longer than wide pleurals, and from S. kolakovskii in the presence of two suprapygals and serrated posterior edge of the carapace. The material from Fortepianka is too fragmentary for detailed comparison, but also differs from S. riabinini in the reduced number of vertebrals. Discussion. The reported material may represent one or two new species of Sakya. The reduced number of vertebrals in these forms probably represents a primitive condition, whereas the extension of the posteriormost vertebral onto the pygal may be a synapomorphy, which unites the new forms. Thus, the Morskaya 2 and Egorovka specimens of Sakya may represent a separate primitive lineage of this genus. In this case, S. kolakovskii and S. riabinini form a more advanced clade with increased number of carapacial scales. These issues as well as phylogenetic position of Sakya within Geoemydidae will be checked by future phylogenetic analysis. The Sakya material from Fortepianka (MN11, late Sarmatian) represents the earliest reliable record of this genus, known previously beginning from MN 12 (Meotic).

River Environments, Climate Change, and Human Impact

2005 ◽  
Author(s):  
Eduard Koster
Keyword(s):  
North Sea ◽  
Large Scale ◽  
Western Europe ◽  
Management Practices ◽  
Drainage System ◽  
River System ◽  
Fluvial System ◽  
The North ◽  
The North Sea ◽  
The Baltic

In this chapter a short overview of the evolution, geomorphological expression, sedimentary records, and discharge and sediment regimes of the major rivers in western Europe is presented. The rivers Elbe, Weser, Rhine, Meuse, Scheldt, Seine, Loire, Garonne, Rhône, and Danube will be separately reviewed but not necessarily in this order and not with equal attention. Emphasis is placed on the Quaternary record and most issues are exemplified by a discussion on phenomena and processes in the Rhine–Meuse delta. As almost all these rivers are strongly influenced by man’s activities, attention is also focused on river management practices, both in a historic context and at present. Finally, modern concepts and plans concerning river conservation and rehabilitation are briefly examined. The foundations of the modern drainage system in north-western Europe were laid in the Miocene when earth movements associated with Alpine orogenesis and the opening of the North Atlantic were at their height (Gibbard 1988). During the Late Tertiary–Early Quaternary the North Sea basin was dominated by an extensive fluvial system that drained the Fennoscandian and Baltic shield through the present Baltic Sea (Overeem et al. 2001; Fig. 6.2). The dimensions of this (former) drainage system were enormous; through empirical relationships based on recent fluvio-deltaic systems the drainage area is estimated to have been in the order of 1.1 × 106 km2. Cenozoic marine and fluvial sediments reach a thickness of more than 3,500 m in the North Sea basin. Quaternary sediments with a thickness of over 1,000 m imply a tenfold increase in sedimentation during this period in comparison to the Tertiary infilling. The fluvial system of Miocene to Middle Pleistocene age has been referred to as the Baltic River system (Bijlsma 1981). It is also designated as the Eridanos delta system by Overeem et al. (2001) named after the legendary Eridanos river in northern Europe mentioned in Greek records (7th century BC). In a seismo-stratigraphic study Overeem et al. (2001) have documented the large-scale basin-fill architecture in terms of external forcing by tectonics, sea-level variations, and climate. The development of this drainage system is attributed to the simultaneous Neogene uplift of the Fennoscandian Shield and the accelerated subsidence of the North Sea basin.

New and little-known taxa of the tribe Diestramimini (Orthoptera: Rhaphidophoridae: Aemodogryllinae) from Southeast Asia. Part 1

2015 ◽  
Vol 24 (1) ◽  
pp. 48-84 ◽  
Author(s):  
A.V. Gorochov ◽  
S.YU. Storozhenko
Keyword(s):  
New Species ◽  
Southeast Asia ◽  
New Subspecies ◽  
New Subgenus ◽  
New Material ◽  
Unknown Male

A new subgenus, 19 new species and two new subspecies are described from Vietnam, Laos and China: Tamdaotettix (Tamdaotettix) aculeatus sp. nov., T. (T.) flexus sp. nov., T. (T.) laocai sp. nov., T. (Laotettix subgen. nov.) tarasovi sp. nov., T. (L.) curvatus sp. nov., T. (L.) minutus sp. nov., T. (L.) inflatus sp. nov., T. (L.) sympatricus sp. nov., T. (?) robustus sp. nov., Gigantettix laosensis sp. nov., G. maximus auster subsp. nov., Diestramima hainanensis sp. nov., D. bispinosa sp. nov., D. hamata sp. nov., D. propria sp. nov., D. yunnanensis sp. nov., D. champasak sp. nov., Adiestramima adunca sp. nov., A. bella sp. nov., A. elongata sp. nov., A. perfecta hue subsp. nov. Previously unknown male of G. maximus maximus Gorochov, 1998 and imago of D. palpata (Rehn, 1906) are described on the base of a new material. New distributional data for some species are given.

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