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Registros recuperados: 15
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An additional record of Oichnus excavatus Donovan & Jagt from the Maastrichtian (Upper Cretaceous) of southern Limburg, The Netherlands Naturalis
Donovan, S.K.; Jagt, J.W.M..
A single example of Oichnus excavatus Donovan & Jagt, infesting the holasteroid echinoid Hemipneustes striatoradiatus (Leske), is reported from the upper Meerssen Member, Maastricht Formation (uppermost Maastrichtian), of the former Blom quarry, Berg en Terblijt, southern Limburg, The Netherlands. This is the first evidence that O. excavatus may be more widely distributed in the type area of the Maastrichtian than previously assumed. The embedment structure occurs just below the ambitus and close to the peristome, suggesting that the producing organism may have been ingesting detritus from the sea floor rather than filter feeding, the more usual interpretation of its behaviour.
Tipo: Article / Letter to the editor Palavras-chave: Embedment structure; Trace fossils; Oichnus; Echinoids; Hemipneustes; Maastrichtian; The Netherlands; 42.72.
Ano: 2005 URL: http://www.repository.naturalis.nl/record/210110
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Ray-finned fishes (Osteichthyes, Actinopterygii) from the type Maastrichtian, the Netherlands and Belgium Naturalis
Friedman, M..
Ray-finned fishes are a diverse, but understudied, component of the Maastrichtian marine fauna of the southeast Netherlands (Limburg) and northeast Belgium (Liège-Limburg). The most extensive reviews of fishes from these uppermost Cretaceous deposits were made in the early and mid-Twentieth Century, but little research on this important assemblage has been executed since. The present paper provides figures and brief descriptions of fishes from the Maastrichtian type area as an aid for field identification of fossil discoveries. A simple key to common Maastrichtian fish teeth from this area is also included. All convincing records of ray-finned fishes from the Maastrichtian of the Netherlands and Belgium, inclusive of the Mons Basin, are teleosts, and...
Tipo: Article / Letter to the editor Palavras-chave: Osteichthyes; Actinopterygii; Teleostei; Bony fish; Cretaceous; Maastrichtian; Type area; Europe; K/Pg extinction; 42.81.
Ano: 2012 URL: http://www.repository.naturalis.nl/record/428932
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The "Tustea Puzzle": hadrosaurid (Dinosauria, Ornithopoda) hatchlings associated with Megaloolithidae eggs in the Maastrichtian of the Hateg Basin (Romania) Ameghiniana
Grigorescu,Dan.
Since 1991 when the coinciding occurrence of megaloolithid eggs and hatchlings of the hadrosaurid Telmatosaurus transsylvanicus was suggested by few limb bone remains found close to the first discovered eggs in the Hateg Basin, tens of eggs grouped in clutches together with neonate bones were unearthed within the place that become "Tustea nesting site". In the meantime the original vertical escarpment near the village of Tustea was leveled and converted into a horizontal platform. By their external characters and eggshell microstructure all the eggs belong to the Megaloolithus oogenus, closer to M. siruguei; similarly, all the baby remains whose state of preservation allows their taxonomic assignment belong to Telmatosaurus transsylvanicus, one of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dinosaur eggs; Megaloolithidae; Hatchlings; Hadrosaurids; Telmatosaurus; Maastrichtian; Hateg Basin; Romania.
Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142010000100006
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New dinoflagellate cyst species from the Calafate Formation (Maastrichtian), Austral Basin, Argentina Ameghiniana
Guler,M. Verónica; Guerstein,G. Raquel; Casadío,Silvio.
The aim of this paper is to erect four new dinoflagellate cyst species from the Maastrichtian Calafate Formation, Austral Basin, Argentina. Andalusiella spinosa sp. nov. is strongly acrocavate and possesses a periphragm covered with spines. Palaeocystodinium pilatum sp. nov. has a periphragm densely covered with fine, flexuous, hair-like projections, shortening towards the end of the horns, and a finely granulate endophragm. The large peridinialean Caligodinium perforatum sp. nov. shows the hypocystal archeopyle typical for the genus, with a simple triplacoid opercular piece and a microfoveolate autophragm surrounded by a perforate flocculent calyptra. Hafniasphaera australis sp. nov. is differentiated from other species of the genus Hafniasphaera by the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dinoflagellate cysts; Maastrichtian; Calafate Formation; Austral Basin; Argentina.
Ano: 2005 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142005000200012
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Rare conifers from the type area of the Maastrichtian (Upper Cretaceous, southeast Netherlands) Naturalis
Ham, R.W.J.M. van der; Konijnenburg-van Cittert, J.H.A. van.
Two conifer twigs from the type area of the Maastrichtian are described as Brachyphyllum sp. 1 and Brachyphyllum sp. 2. They might belong to the Cheirolepidiaceae, Podocarpaceae or Taxodiaceae. Brachyphyllum sp. 1 occurs with the conifers Brachyphyllum patens (?Cheirolepidiaceae) and Elatidopsis cryptomerioides (Taxodiaceae), the seagrass Thalassocharis bosqueti and the ammonite Baculites vertebralis in the upper part of the Kunrade Chalk in the Kunrade area, while Brachyphyllum sp. 2 probably originates from the lower part of this deposit.
Tipo: Article / Letter to the editor Palavras-chave: Brachyphyllum; Conifer; Maastrichtian; Kunrade Chalk; 38.21.
Ano: 2003 URL: http://www.repository.naturalis.nl/record/219297
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Sabellids and serpulids (Polychaeta sedentaria) from the type Maastrichtian, the Netherlands and Belgium Naturalis
Jäger, M..
Calcareous tubes of the sabellid genus Glomerula and of the family Serpulidae (subfamilies Serpulinae and Spirorbinae) rank amongst the commoner, highly diverse biota of the type Maastrichtian strata. These cover the sequence from the upper Beutenaken Member (Gulpen Formation) up to and including the Meerssen Member (Maastricht Formation). Of the 40+ taxa of calcareous worm tubes found in this interval, the commonest ones are described and illustrated in the present paper, which also comprises a revision of data published in 2005.
Tipo: Article / Letter to the editor Palavras-chave: Sabellidae; Serpulidae; Late Cretaceous; Maastrichtian; The Netherlands; Belgium; Systematics; 38.22; 42.76.
Ano: 2012 URL: http://www.repository.naturalis.nl/record/428928
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Belemnitellid coleoids (Mollusca, Cephalopoda) from the type Maastrichtian, the Netherlands and Belgium Naturalis
Jagt, J.W.M..
Belemnitellid coleoids abound at some levels within the Gulpen and Maastricht formations in the study area, and ‘belemnite graveyards’ have long been known from the Bovenste Bos (Epen) and Slenaken-Beutenaken areas in southern Limburg, the Netherlands. Recent studies have demonstrated the presence of at least three species of the genus Belemnitella d’Orbigny, 1840, and five of Belemnella Nowak, 1913, and its subgenera Belemnella, Pachybelemnella Schulz, 1979, and Neobelemnella Naidin, 1975. Representatives of Belemnitella junior Nowak, 1913, and Belemnella (Neobelemnella) gr. kazimiroviensis (Skołozdrówna, 1932) are the only coleoids to reach the Cretaceous-Paleogene (K/Pg) boundary, and members of the latter group may even have persisted into the earliest...
Tipo: Article / Letter to the editor Palavras-chave: Mollusca; Coleoides; Belemnitellidae; Cretaceous; Maastrichtian; Type area; 38.22; 42.73.
Ano: 2012 URL: http://www.repository.naturalis.nl/record/428931
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A Late Cretaceous gastropod homing scar (possibly ichnogenus Lacrimichnus) from southern Limburg, The Netherlands Naturalis
Jagt, J.W.M..
An isolated gastropod homing scar, etched into an arcoscalpelline (cirripede) scutum, is recorded from the upper Nekum Member (Maastricht Formation, upper Maastrichtian) at the ENCI-HeidelbergCement Group quarry. This trace may be assignable to the ichnogenus Lacrimichnus Santos, Mayoral & Muñiz, that comprises etching scars produced by Neogene calyptraeid and/or capulid gastropods and ostreid bivalves from southern Spain and Portugal. However, it differs from both ichnospecies currently contained in that ichnogenus, L. bonarensis and L. cacelensis, in showing a relatively deep depression around the rim, irregularly distributed pit- and slit-like depressions, and an irregularly subcircular outline. Despite the wealth of available hard substrates...
Tipo: Article / Letter to the editor Palavras-chave: Trace fossil; Homing scar; Gastropoda; Lacrimichnus; Cirripedia; Upper Cretaceous; Maastrichtian; The Netherlands; 38.22; 42.73.
Ano: 2007 URL: http://www.repository.naturalis.nl/record/217413
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Fossils of the type Maastrichtian Naturalis
Jagt, J.W.M.; Donovan, S.K.; Jagt-Yazykova, E.A..
The south-western Indian Ocean islands, excluding the microcontinent of Madagascar, are geologically complex and diverse. They have been subject to drastic sea level changes, volcanic events and anthropogenic changes, all of which have contributed to confuse understanding of their avian biogeography. An array of factors have affected these avifaunas, based on palaeontological, historical and molecular evidence,which together have shown that avian biogeography is not congruent with the relative age and size of the islands.
Tipo: Article / Letter to the editor Palavras-chave: Macrofossils; Cretaceous; Maastrichtian; Mesozoic; Geology; Palaeontology; 38.20; 38.22.
Ano: 2012 URL: http://www.repository.naturalis.nl/record/428551
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Stratigraphy of the type Maastrichtian – a synthesis Naturalis
Jagt, J.W.M.; Jagt-Yazykova, E.A..
A synthesis of the stratigraphy of the Maastrichtian Stage in its extended type area, that is, southern Limburg (the Netherlands), and adjacent Belgian and German territories, is presented with a brief historical overview. Quarrying activities at the large quarry complex of ENCI-HeidelbergCement Group will officially come to an end on July 1, 2018. However, the stratotype section below the Lichtenberg farmstead and directly behind the main office building at the Lage Kanaaldijk (Maastricht), will be preserved, as will various faces within the quarry complex. Strata of Maastrichtian age include the Vijlen, Lixhe 1-3 and Lanaye members of the Gulpen Formation, as well as the Valkenburg, Gronsveld, Schiepersberg, Emael, Nekum and Meerssen members of the...
Tipo: Article / Letter to the editor Palavras-chave: Late Cretaceous; Maastrichtian; Type area; Localities; Stratigraphy; 38.16; 38.22.
Ano: 2012 URL: http://www.repository.naturalis.nl/record/428924
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Late Cretaceous ophiuroids in the Binkhorst Collection at the Museum für Naturkunde, Berlin, reassessed Naturalis
Jagt, J.W.M.; Neumann, C..
A small lot of latest Cretaceous brittlestars from the Maastrichtian type area, contained in the Binkhorst [van den Binkhorst] Collection at the Museum für Naturkunde in Berlin, is restudied and, in part, illustrated for the first time. Presumably, these thirteen specimens represent only a portion of the ophiuroid material referred to in two papers by Binkhorst van den Binkhorst, both published in 1859, because all are assignable to two species which are common only in the Nekum and Meerssen members of the type Maastrichtian, namely Felderophiura vanderhami Jagt, 1991, and Ophiomusium lux Jagt & Kutscher in Jagt, 2000. Brittlestar material from lower levels within the Maastricht Formation (i.e., Valkenburg, Gronsveld, Schiepersberg and Emael members)...
Tipo: Article / Letter to the editor Palavras-chave: Echinodermata; Ophiuroidea; Late Cretaceous; Maastrichtian; The Netherlands; 38.22.
Ano: 2010 URL: http://www.repository.naturalis.nl/record/361977
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Notes on taxonomy and taphonomy of two Upper Maastrichtian (Upper Cretaceous) scleractinian corals from Limburg, The Netherlands Naturalis
Leloux, J..
A lectotype has been assigned for Placosmilia? robusta Umbgrove, 1925. This taxon, although fitting into the original diagnosis of Placosmilia, is not defined by the emended diagnosis of Alloiteau and later authors. Specimens from the Upper Maastrichtian of The Netherlands, that were formerly wrongly attributed to Galaxea fasciculata (Lamarck, 1816), a homonym of the extant species Galaxea fascicularis (Linnaeus, 1758), belong to Placocoenia macrophthalma (Goldfuss, 1826). The specimen depicted as P. macrophthalma by Umbgrove does not belong to this taxon and is placed in open nomenclature.
Tipo: Article / Letter to the editor Palavras-chave: Scleractinia; Galaxea fasciculata; Placosmilia robusta; Maastrichtian; Meerssen Member; Ichnofossil; 38.22; 42.79.
Ano: 2004 URL: http://www.repository.naturalis.nl/record/214518
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[Proceedings of the 5th Symposium on Mesozoic and Cenozoic Decapod Crustaceans, Krakow, Poland, 2013: A tribute to Pál Mihály Müller / R.H.B. Fraaije, M. Hyžný, J.W.M. Jagt, M. Krobicki & B.W.M. van Bakel (eds.)]: A new species of icriocarcinid crab (Crustacea, Portunoidea) from the uppermost Cretaceous of California, USA: palaeobiogeographic implications Naturalis
Nyborg, T.; Ossó, A.; Vega, F.J..
A new species of icriocarcinid crab, Branchiocarcinus pacificus, is described from the uppermost Cretaceous Moreno Formation of California; in addition, an indeterminate species of the same genus is recorded from the Campanian of Hornby Island, Vancouver Island, Canada. The wide distribution of the Icriocarcinidae during the Late Cretaceous is confirmed.
Tipo: Article / Letter to the editor Palavras-chave: Branchiocarcinus; New species; Maastrichtian; California; Canada; 42.74; 38.22.
Ano: 2014 URL: http://www.repository.naturalis.nl/record/523865
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Larger benthic Foraminifera of the type Maastrichtian Naturalis
Renema, W.; Hart, M.B..
Brief descriptions are presented of species of larger benthic foraminifera found in the type area of the Maastrichtian, supported by an identification key.
Tipo: Article / Letter to the editor Palavras-chave: Larger benthic foraminifera; Maastrichtian; Maastricht; The Netherlands; 42.89; 38.22.
Ano: 2012 URL: http://www.repository.naturalis.nl/record/428926
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The stratigraphic positions of the Wadi Dukhan and Al Uwayliah formations, northeast Libya – a review Naturalis
Tmalla, A.F.A..
The stratigraphic positions of the Wadi Dukhan and Al Uwayliah formations are reviewed. Diagnostic Maastrichtian larger foraminiferal species from the Wadi Dukhan Formation in well B7 – 41 (Cyrenaica) and in well U2 – 6 (northeastern Sirt Basin) are illustrated for the first time. These species are Omphalocyclus macroporus (Lamarck), Siderolites cf. calcitrapoides Lamarck and Orbitoides cf. media (d’Archiac). Following the rules of nomenclature, the type section of the Al Uwayliah Formation should be considered a composite stratotype. The section east of al Uwayliah village is the holostratotype (upper part of the formation) and the Jardas al Jarrari section is the parastratotype (lower part of the formation). The combined thickness of the two component...
Tipo: Article / Letter to the editor Palavras-chave: Maastrichtian; Paleocene; Northeast Libya; Stratigraphy; Foraminifera; 38.22; 42.79.
Ano: 2007 URL: http://www.repository.naturalis.nl/record/217418
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