A new paguroid from the type Maastrichtian (upper Cretaceous, the Netherlands) and erection of a new family

2017 ◽  
Vol 188 (3) ◽  
pp. 17 ◽  
Author(s):  
René H.B. Fraaije ◽  
Barry W.M. Van Bakel ◽  
John W.M. Jagt
Keyword(s):  
The Netherlands ◽  
Upper Cretaceous ◽  
Natural Sciences ◽  
Morphological Features ◽  
Hermit Crabs ◽  
New Taxon ◽  
Close Resemblance ◽  
New Family ◽  
Type Area ◽  
Upper Maastrichtian

On the basis of a fragmentary carapace a new extinct paguroid, Annuntidiogenes massetispinosus n. sp., is described from the upper Meerssen Member (Maastricht Formation, upper Maastrichtian) of the Maastrichtian type area in the southeast Netherlands. The new taxon represents the fifth and stratigraphically youngest member of this Mesozoic genus that shows a remarkably close resemblance to the extant diogenids Aeropaguristes Rahayu and McLaughlin, 2010 (Rahayu DL, McLaughlin PA. 2010. Areopaguristes, a generic replacement name for Stratiotes Thomson, 1899 (Crustacea: Decapoda: Paguroidea: Diogenidae). Zootaxa 2509: 67–68), Paguristes Dana, 1851 (Dana JD. 1851. Conspectus crustaceorum quae in orbis terrarum circumnavigatione, Carolo Wilkes e classe reipublicae foederatae duce, lexit et descripsit. (Preprint from) Proceedings of the Academy of Natural Sciences, Philadelphia 5: 267–272) and Pseudopaguristes McLaughlin, 2002 (McLaughlin PA. 2002. Pseudopaguristes, a new and aberrant genus of hermit crabs (Anomura: Paguridea: Diogenidae). Micronesica 34(2): 185–199). Morphological features of paguroid carapaces, not previously used by neontologists, form the basis for a further systematic refinement of the Paguroidea, with the erection of a new family, the Calcinidae n. fam.

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.

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.

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 cyclic Rørdal Member – a new lithostratigraphic unit of chronostratigraphic and palaeoclimatic importance in the upper Maastrichtian of Denmark

2010 ◽  
Vol 58 ◽  
pp. 89-98
Author(s):  
Finn Surlyk ◽  
Lars Stemmerik ◽  
Morten Ahlborn ◽  
Rikke Harlou ◽  
Bodil W. Lauridsen ◽  
...  
Keyword(s):  
North Sea ◽  
Deep Water ◽  
Upper Cretaceous ◽  
Planktonic Foraminifers ◽  
The North ◽  
Water Wells ◽  
Type Area ◽  
The North Sea ◽  
Early Late ◽  
Upper Maastrichtian

The Maastrichtian chalk of the Danish Basin has been referred to the Tor Formation of the North Sea, but this may not be tenable because this formation in its type area shows a much higher degree of redeposition than the Maastrichtian chalk of the Danish Basin. The onshore succession has not been lithostratigraphically subdivided due to its rather monotonous nature and the widely scattered outcrops. An exception is the uppermost Maastrichtian exposed at Stevns Klint which is been referred to the Sigerslev Member, comprising rather benthos-poor, deep-water pure chalk, and the overlying mound-bedded, bryozoan-rich chalk which is placed in the Højerup Member. In addition, a thin marly chalk bed, the Kjølby Gaard Marl Member, containing Tethyan planktonic foraminifers is known from localities in northern Jylland and from water wells around Køge, eastern Sjælland. The new Rørdal Member is a cyclic chalk-marl unit, about 10 m thick, sandwiched between pure white chalks. It is well exposed in the large Rørdal quarry in Aalborg, and is recognised in boreholes south of Aalborg and in the Stevns-1 and Karlslunde-1 boreholes south of Copenhagen. Coccolith and brachiopod data show that it belongs to the UC20b-cBP nannofossil zone of the North Sea scheme for the Upper Cretaceous Boreal province, and the semiglobularis-humboldt iibrachiopod zone, both indicating the lower upper Maastrichtian. Isotope data show that it represents a distinct early late Maastrichtian cooling event. The member thus has a basinwide distribution and is an important isochronous marker.

scholarly journals The stratigraphic range of the index ammonite Pachydiscus neubergicus (von Hauer, 1858) in the type area of the Maastrichtian Stage

2003 ◽  
Vol 82 (3) ◽  
pp. 261-268 ◽  
Author(s):  
J.W.M. Jagt ◽  
W.M. Felder
Keyword(s):  
The Netherlands ◽  
Northern Spain ◽  
Lower Upper ◽  
Type Area ◽  
Extended Type ◽  
Stratigraphic Range ◽  
Upper Maastrichtian ◽  
Sw France

AbstractIn the extended type area of the Maastrichtian Stage (southern Limburg, the Netherlands; provinces of Limburg and Liège, Belgium; Aachen area, Germany), the pachydiscid Pachydiscus (P.) neubergicus (von Hauer, 1858) ranks amongst the rarer species of Campanian-Maastrichtian ammonites. To date, just four specimens are known, which show P. (P.) neubergicus in this area to have been confined to the Vijlen Member (Intervals 0–6, Gulpen Formation). This would correspond to the basal sumensis Zone to the lower cimbrica Zone, or tegulatus/junior Zone, depending on placement of the Lower/Upper Maastrichtian boundary. Material available has been collected in recent years at the CBR-Lixhe (Liège, Belgium) and ENCI-Maastricht bv (Maastricht) quarries as well as from outcrop 62D-26 at Vijlenerbosch (Vijlen, the Netherlands). Records of P. (P.) neubergicus, the proposed index for the base of the Maastrichtian Stage, from elsewhere in Europe (northern Spain, SW France, Austria, Denmark, Bulgaria), suggest it to have been fairly long-ranging and show local first occurrences to have been diachronous.

Anatomy and functional morphology of the largest marine reptile known, Mosasaurus hoffmanni (Mosasauridae, Reptilia) from the Upper Cretaceous, Upper Maastrichtian of The Netherlands

1995 ◽  
Vol 347 (1320) ◽  
pp. 155-180 ◽  
Keyword(s):  
Functional Analysis ◽  
The Netherlands ◽  
Functional Morphology ◽  
Upper Cretaceous ◽  
Lower Jaw ◽  
Olfactory Organs ◽  
Marine Reptile ◽  
Four Bar Linkage ◽  
First Time ◽  
Upper Maastrichtian

Mosasaurus hoffmanni , one of the latest known mosasaurs, comes from the Upper Maastrichtian, Upper Cretaceous Chalk of The Netherlands. Although the first specimen was discovered over 200 years ago, it is here fully described for the first time to provide detailed insights into its anatomy, functional morphology and evolution. Many characters of the skull show that M. hoffmanni was among the most advanced mosasaurs. The skull is robustly constructed and is the least kinetic in the Mosasauridae and, with a tightly assembled palatal complex, provided greater cranial stability in this large-headed mosasaur. The cranial musculature is highly modified. The four-bar linkage system of lizards and early mosasaurs is non-functional in M. hoffmanni . The elements of the lower jaw are also more tightly united than in other mosasaurs. Tooth crowns are divided into several distinct, unique cutting surfaces or prisms. A functional analysis of the marginal teeth shows that they are particularly adapted to powerful bite forces although pterygoidal teeth are small and reduced in importance in ratchet feeding. Moderately large orbits and poorly developed olfactory organs suggest that Mosasaurus hoffmanni was a surface-swimming animal. A relatively lower level of binocular vision than in some other mosasaurs may indicate a somewhat uncomplicated habitat. Geological and palaeontological evidence indicates that M. hoffmanni lived in fairly deep nearshore waters of 40—50 m depth, with changing temperatures and rich vertebrate and invertebrate life. Several severely broken and healed mandibles suggest either a violent lifestyle in predation or in fighting.

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