scholarly journals New plesiosaurid material from the Maastrichtian type area, the Netherlands

2019 ◽  
Vol 98 ◽  
Author(s):  
Feiko Miedema ◽  
Anne S. Schulp ◽  
John W.M. Jagt ◽  
Eric W.A. Mulder
Keyword(s):  
The Netherlands ◽  
Caudal Vertebra ◽  
Type Area ◽  
Juvenile Individual

Abstract Here we report on a newly collected, well-preserved vertebral centrum of a plesiosaur from the type area of the Maastrichtian Stage in southern Limburg. The specimen is interpreted as a caudal vertebra that originated from an osteologically immature or juvenile individual, as evidenced by the position of the pedicular facets, the presence of a notochord pit and the absence of fused neural arches. It adds to the meagre record of sauropterygians in the area.

Latest Cretaceous storm-generated sea grass accumulations in the Maastrichtian type area, the Netherlands – preliminary observations

2019 ◽  
Vol 130 (5) ◽  
pp. 590-598
Author(s):  
John W.M. Jagt ◽  
Mart Deckers ◽  
Stephen K. Donovan ◽  
René Fraaije ◽  
Stijn Goolaerts ◽  
...  
Keyword(s):  
The Netherlands ◽  
Type Area ◽  
Sea Grass

scholarly journals First record of Pachydiscus noetlingi Kennedy, 1999 (Ammonoidea) from the Maastrichtian type area (the Netherlands)

2003 ◽  
Vol 82 (3) ◽  
pp. 303-307 ◽  
Author(s):  
J.W.M. Jagt ◽  
W.J. Kennedy
Keyword(s):  
The Netherlands ◽  
New Record ◽  
First Record ◽  
Type Area ◽  
Upper Maastrichtian

AbstractTwo specimens of a pachydiscid ammonite, a fragmentary silicified phragmocone from the Kunrade Limestone facies at Kunrade (Schunck), and a partial external mould preserved in flint from the Nekum Member (both Maastricht Formation, Belemnitella junior Zone of authors) at the former Blom quarry (Berg en Terblijt), are identified as Pachydiscus (P.) noetlingi Kennedy, 1999, a species previously known only from the Upper Maastrichtian of Baluchistan (Pakistan). This new record underscores the proposal of incursions of Tethyan biota into the type area of the Maastrichtian Stage, previously documented for other groups, including echinoderms and bivalves, as well.

scholarly journals A new species of dercetid (Teleostei, Aulopiformes) from the type Maastrichtian of southern Limburg, the Netherlands

2019 ◽  
Vol 98 ◽  
Author(s):  
Jonathan J.W. Wallaard ◽  
René H.B. Fraaije ◽  
Henk J. Diependaal ◽  
John W.M. Jagt
Keyword(s):  
New Species ◽  
The Netherlands ◽  
New Taxon ◽  
Middle Portion ◽  
Type Area ◽  
A New Species ◽  
Skull Bones

AbstractOn the basis of dissociated and scattered skull bones and several types of scutes and scales of a single, large-sized individual, a new species of dercetid is recorded from the lower to middle portion of the Maastricht Formation (upper Gronsveld, Schiepersberg or Emael members) as formerly exposed at ’t Rooth quarry near Bemelen, east of Maastricht, the Netherlands. This new taxon,Pelargorhynchus grandisn. sp., the fifth dercetid recorded to date from the type area of the Maastrichtian Stage, is characterised by the presence of both large, smooth scutes and small ornamented scales, by the degree of curvature of skull bones, the presence of unfused premaxillae and the lack of teeth.

Jagtia kunradensis, a new genus and species of clawed lobster (Decapoda: Nephropidae) from the Upper Cretaceous (Upper Maastrichtian) Maastricht Formation, The Netherlands

2000 ◽  
Vol 74 (2) ◽  
pp. 224-229 ◽  
Author(s):  
Dale Tshudy ◽  
Ulf Sorhannus
Keyword(s):  
The Netherlands ◽  
Deep Water ◽  
Phylogenetic Relationships ◽  
Upper Cretaceous ◽  
New Genus ◽  
New Genus And Species ◽  
Type Area ◽  
Fossil Form ◽  
Upper Maastrichtian

A new genus and species of clawed lobster, Jagtia kunradensis, is described from the Upper Cretaceous (Upper Maastrichtian) Kunrade Limestone facies of the Maastricht Formation, The Netherlands. Three nephropid lobster genera and at least three species (Oncopareia bredai Bosquet, 1854, sensu Tshudy, 1993, Oncopareia sp. Tshudy, 1993, Hoploparia beyrichi Schlüter, 1862, and Jagtia kunradensis) have now been collected from limestones of the Maastrichtian type area (southeastern Netherlands and northeastern Belgium). Cladistic methods were employed in re-evaluating the phylogenetic relationships of the nephropid lobsters, including Jagtia. These analyses indicate that Jagtia is part of a clade that includes the recent Thymops and Thymopsis. The new genus is the first fossil form to be closely allied with these deep-water genera.

New calappid crabs (Crustacea, Decapoda, Brachyura) from the Late Maastrichtian of the Netherlands

2002 ◽  
Vol 76 (5) ◽  
pp. 913-917 ◽  
Author(s):  
René H. B. Fraaije
Keyword(s):  
The Netherlands ◽  
Early Cretaceous ◽  
Type Area ◽  
Successful Group

The Callapoid family Necrocarcinidae Förster, 1968, was a successful group of crabs distributed worldwide and ranging in age from the Early Cretaceous to the Oligocene. Included taxa appear to have preferred littoral to sublittoral environments (e.g., Fraaye, 1994), have crawled closely appressed to the bottom and/or to have sheltered in muddy bottoms (Bishop and Williams, 1991), and probably were adapted to temperate to tropical climatic settings (Schweitzer and Feldmann, 2000). This lifestyle is similar to that of extant calappids. Before the present study only two calappids were known from the Maastrichtian type area. Both these species, Prehepatus werneri Fraaye and Collins, 1987, and Paranecrocarcinus quadriscissus (Noetling, 1881), have been described and discussed in detail by Collins et al. (1995).

Aspects of clavate borings in the type Maastrichtian (Upper Cretaceous) of the Netherlands and Belgium

2013 ◽  
Vol 92 (2-3) ◽  
pp. 133-143 ◽  
Author(s):  
S.K. Donovan ◽  
J.W.M. Jagt
Keyword(s):  
The Netherlands ◽  
Upper Cretaceous ◽  
Three Dimensional ◽  
Rotten Wood ◽  
Type Area

We describe a collection of borings in carbonate and xylic substrates (Gastrochaenolites ispp., Teredolites longissimus Kelly & Bromley), some of them containing their producers, from the Maastricht and Houthem formations (late Maastrichtian and early Danian) in the type area of the Maastrichtian Stage, but mainly from the ENCI-HeidelbergCement Group quarry, St. Pietersberg (southern Limburg, the Netherlands). Included are specimens of Gastrochaenolites dijugus Kelly & Bromley, showing different modes of formation of the figure-of-eight aperture, either as part of the lining, incorporating the substrate or both. Gastrochaenolites lapidicus Kelly & Bromley was produced by the gastrochaenid bivalve Gastrochaena, whereas G. orbicularis Kelly & Bromley is the trace of Jouannetia supracretacea (De Ryckholt). Bioglyph-like infills of G. orbicularis and G. torpedo Kelly & Bromley rather represent external moulds of the producing bivalves; they are termed pseudobioglyphs herein. Teredolites longissimus is preserved as clusters of in situ, parallel to sub-parallel tubes, although the woody substrate has decayed, and disarticulated fragments of calcareous tubes have been released from rotten wood. The latter include some specimens filled by flint and show good three-dimensional preservation. Some notes on the taxonomy of the producing bivalve taxa are added.

scholarly journals The Eemian stage in the Netherlands: history, character and new research

2000 ◽  
Vol 79 (2-3) ◽  
pp. 135-145 ◽  
Author(s):  
J.H.A. Bosch ◽  
P. Cleveringa ◽  
T. Meijer
Keyword(s):  
The Netherlands ◽  
Sedimentary Environment ◽  
Sediment Accumulation ◽  
Depositional Environments ◽  
Vegetation Development ◽  
North West ◽  
Historical Outline ◽  
Type Area ◽  
Mollusc Species ◽  
New Research

AbstractA historical outline of the Eemian research in the Netherlands is presented as an introduction to recent research in the type area. At the end of the 19th and during the first part of the 20th century, Eemian sediments were recognized because of the presence of lusitanian and mediterranean mollusc species. From 1930 onwards, pollen analysis made it possible to identify also non-shell-bearing deposits and to equate them with the Eemian. At the same time this technique proved a valuable tool for understanding the vegetation development during this interglacial. Pollen zonation offered a unique possibility for the correlation of terrestrial sequences in North-West Europe.The type area of the Eemian, near Amersfoort, was described by Harting in 1874 and was comprehensively restudied by Zagwijn (1961). A pollen zonation was introduced as a standard for the Netherlands, allowing the correlation of pollen records from both marine and non-marine depositional environments. This enabled a more detailed temporal resolution, resulting in a better understanding of the distribution of the various environments in the type area.In the northern and central parts of the Netherlands, the identification of the marine sequence was, apart from the occurrence of the specific mollusc fauna, facilitated by the presence of a till of Saalian age underlying the Eemian deposits. The presence of deep glacial basins in these areas enabled the deposition and preservation of a complete Eemian record in a marine setting. Sediment accumulation in the basins began immediately following deglaciation at the end of the Saalian. The Eemian type sections at Amersfoort are situated near the margin of one of these basins.Recent research of the Eemian focused on the integration of lithostratigraphic evidence and information on the sedimentary environment as derived from diatoms, dinoflagellates, foraminifers, molluscs and pollen.

scholarly journals Prognathodon (Squamata, Mosasauridae) from the Maastrichtian chalk of Denmark

2021 ◽  
Vol 69 ◽  
pp. 53-58
Author(s):  
Tom J. Giltaij ◽  
Jesper Milàn ◽  
John W.M. Jagt ◽  
Anne S. Schulp
Keyword(s):  
The Netherlands ◽  
Type Area

Two mosasaur tooth crowns collected from the Maastrichtian chalk sequences of Stevns Klint and Møns Klint are here assigned to Prognathodon, a mosasaur genus hitherto unknown from Denmark. Together with previous records of the mosasaurs Plioplatecarpus, Mosasaurus and Carinodens, these new finds of Prognathodon document the coexistence of four mosasaurid genera in the Danish chalk and underscore simi-larities to coeval assemblages from the Maastrichtian type area in the Netherlands and Belgium.

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