Maastricht, Netherlands
Maastricht, Netherlands

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Van Viersen A.P.,Natuurhistorisch Museum Maastricht | Holland D.,Sandstrasse 26
Geologica Belgica | Year: 2016

New species of the otarionine trilobite Cyphaspis are recorded from Pragian to Givetian localities in Morocco and Belgium. The material carries a wealth of new insights into the diversity of Cyphaspis during the Devonian. In an attempt to bring structure to the vast assortment of species, selected taxa are clustered into three informal groups that need to be validated in future analyses: the agayuara group for Siluro-Devonian species that retain a “primitive” morphology, the hamidi group for comparatively small, Emsian to Eifelian species with convergences on Otarion, and the ceratophthalmus group which encompasses the type species of Cyphaspis, C. ceratophthalmus (Goldfuss, 1843), and similar species. Morphological trends in each of the groups are briefly elaborated on. Twelve new species are recorded from Morocco: C. bluhmi sp. nov., C. eximia sp. nov., C. foumzguidensis sp. nov., C. heisingi sp. nov., C. ihmadii sp. nov., C. juergenhollandi sp. nov., C. khraidensis sp. nov., C. kippingi sp. nov., C. lerougei sp. nov., C. maharchensis sp. nov., C. smeenki sp. nov., C. tadachachtensis sp. nov. One additional species, C. boninoi sp. nov., is recorded from Belgium. Topotypical material of C. ceratophthalmus from Germany and the holotype of C. goerlichi (Haas, 1968) from Turkey are illustrated for comparisons to the other species. The holotype of C. ceratophthalmus could not be traced and a neotype is designated. © 2016, Geologica Belgica. All rights reserved.

Jagt J.W.M.,Natuurhistorisch Museum Maastricht | Jagt-Yazykova E.A.,University of Opole
Scripta Geologica | Year: 2012

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 Maastricht Formation. The lower Maastrichtian portion is comparatively poorly preserved, being characterised by frequent reworking; only elements of the Belemnella obtusa, Belemnella sumensis and/or Belemnella cimbrica zones (the two last-named representing the traditional Belemnella occidentalis Zone) have been recorded. Belemnitella junior and Belemnitella lwowensis define the upper Maastrichtian, both first appearing in interval 4 of the Vijlen Member. At the ENCI-HeidelbergCement Group quarry, the lower/upper Maastrichtian boundary is placed at c. 5 m above the Zonneberg Horizon on benthic foraminifer evidence; strontium isotope data are in agreement. The highest portion of the Meerssen Member (uppermost IVf-6 and IVf-7) is missing from the type section; this part of the sequence is exposed at the former Curfs quarry (Geulhem), the Berg en Terblijt Horizon being equated with the Cretaceous/Paleogene (K/Pg boundary).

Shark rostral nodes from the Yorktown Formation (Zanclean, early Pliocene) of Lee Creek Mine, North Carolina (USA), previously assigned to the genus Lamna Cuvier, 1816, have been reinterpreted using a preliminary identification key for extant Lamniformes based on rostral morphology. In addition, the fossil rostral nodes have been compared in detail with Recent material of both the porbeagle, Lamna nasus (Bonnaterre, 1788) and the salmon shark, Lamna ditropis Hubbs & Follet, 1947. Despite the fact that the rostra compared relatively well with those of Recent Lamna, the Lee Creek Mine specimens proved to differ significantly in having near-parallel lateral rostral cartilages that join the rostral node individually, instead of abutting ones. Based on this observation, we here propose to strike the genus Lamna from the Lee Creek Mine faunal list, so long as no other diagnostic material is forthcoming. These partially preserved rostra are likely to have belonged to extinct taxa within the families Lamnidae or Otodontidae, both of which have been documented from the Yorktown Formation on the basis of isolated teeth of at least three species, Cosmopolitodus hastalis (Agassiz, 1838), Megaselachus megalodon (Agassiz, 1835) and Parotodus benedenii (Le Hon, 1871).

Jagt J.W.M.,Natuurhistorisch Museum Maastricht
Cretaceous Research | Year: 2011

Ten years after his return to England on board 'The Beagle' in 1836, Charles Robert Darwin (1809-1882) started collecting, dissecting, describing and interpreting both extant and fossil acorn and goose barnacles (cirripedes). In all, he spent eight years on this animal group and, between 1851 and 1855, published four authoritative and admirably illustrated volumes on these sessile crustaceans; a highly valuable source of information, even to the present day. The Maastricht pharmacist, Joseph Augustin Hubert de Bosquet (1814-1880), who also was a well-versed collector and student of Late Cretaceous fossils from the nearby St Pietersberg, corresponded with Darwin on the subject of cirripedes between 17 December 1852 and early November 1856. In addition, these gentlemen exchanged monographs, manuscripts, engravings and specimens. At a time when Darwin was finally trying to come to terms with his 'wretched' barnacles, he much appreciated the support and understanding coming from Maastricht and his letters clearly show the respect he had for his fellow barnacle worker. In fact, Darwin's barnacle work strengthened his resolve to publish his 1859 masterpiece, On the Origin of Species. Current studies of cirripedes in the Maastricht area seek to complement de Bosquet's pioneering work and document in more detail the stratigraphic ranges of the various taxa as well as their relationships with species elsewhere in Europe as well as overseas. © 2011 Elsevier Ltd.

Donovan S.K.,Naturalis Biodiversity Center | Jagt J.W.M.,Natuurhistorisch Museum Maastricht
Geologie en Mijnbouw/Netherlands Journal of Geosciences | Year: 2013

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.

Donovan S.K.,Naturalis Biodiversity Center | Jagt J.W.M.,Natuurhistorisch Museum Maastricht
Ichnos:an International Journal of Plant and Animal | Year: 2013

Two tests of the holasteroid echinoid Hemipneustes striatoradiatus (Leske) from the type area of the Maastrichtian Stage (Upper Cretaceous) bear a varied infestation of episkeletozoans (oysters, bryozoan colony, and serpulids), borings (probable Caulostrepsis isp., Oichnus simplex Bromley), surface abrasion (Gnathichnus? isp.), and pits (O. excavatus Donovan and Jagt). Only O. excavatus represents a premortem infestation. In one specimen, the four individual pits of this ichnospecies are each associated with a different ambulacrum and pore pairs that, in life, bore respiratory tube feet; the anterior ambulacrum, of different gross morphology, is not infested. In the second test, three out of four of the same ambulacra are infested, although there are also O. excavatus in the interambulacra. The association between O. excavatus and the ambulacra of the echinoid, and thus its tube feet, is open to several plausible explanations, but most likely provided some form of feeding or protective advantage to the pit-forming organism. © 2013 Copyright Taylor and Francis Group, LLC.

Van Viersen A.P.,Natuurhistorisch Museum Maastricht
Memoirs of the Association of Australasian Palaeontologists | Year: 2013

Several species of acastid trilobites are recorded from shallow-water deposits at two localities in the eastern part of the Dinant Synclinorium, Ardennes, Belgium. The species are Acastava? lerougei sp. nov., Treveropyge sp. and Delocare sp. in the Hierges Formation (upper Emsian) near Marche-en-Famenne, and Jaylopygiella debruni sp. nov. in the Rivière Formation (Eifelian to lower Givetian) at Kin. Previous reports of Proetidae, Phacopidae and Odontopleuridae from the Hierges Formation in the southern part of the Dinant Synclinorium are corroborated. Saharops Morzadec and Wiltzops Basse are considered to be junior subjective synonyms of Delocare Struve. The lectotype and several topotype specimens of Acastava? schmidti (Richter) from the Gladbach Formation (lower Emsian) in the Eifel are refigured.

Jagt J.W.M.,Natuurhistorisch Museum Maastricht
Scripta Geologica | Year: 2012

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 (Sko?ozdr?wna, 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 Paleocene.

Sorensen A.M.,Copenhagen University | Surlyk F.,Copenhagen University | Jagt J.W.M.,Natuurhistorisch Museum Maastricht
Cretaceous Research | Year: 2012

The bivalve fauna from a late early Campanian rocky shore at Ivö Klack (southern Sweden), comprises just over sixty species, a very high diversity in comparison to other Late Cretaceous and modern rocky shore bivalve assemblages. This high diversity is here considered to represent a reliable census of the fauna; only in part can it be explained by the cumulative effect of generations of bivalves inhabiting this coastal environment. The high density and diversity and the wide range of shell morphologies allow interpretation of different modes of life in this variable environment with many contrasting habitats. Study of the functional morphology of bivalve shells and comparison with extant relatives has resulted in a subdivision of the fauna into seven guilds and five habitats. The bivalve fauna represents a within-habitat, time-averaged assemblage to which none of the species was introduced from adjacent environments. It includes some of the most northerly known, very small rudistid bivalves, in addition to the oldest known occurrences of Mytilus and Barbatia in association with rocky shores. Bivalves constituted the most important invertebrate group inhabiting the late early Campanian rocky shore at Ivö Klack, in terms of diversity, density and biomass. © 2011 Elsevier Ltd.

Remin Z.,University of Warsaw | Machalski M.,Polish Academy of Sciences | Jagt J.W.M.,Natuurhistorisch Museum Maastricht
Geological Quarterly | Year: 2015

A fragmentary specimen of the diplomoceratid heteromorph Diplomoceras cylindraceum, one of three ammonite markers used for the definition of the base of the Maastrichtian Stage, is recorded from the Middle Campanian of the Roztocze Hills, south-east Po land. The new find, well-con strained by associated ammonites and inoceramid bivalves, rep resents the earliest well-dated occurrence of this species worldwide to date. Therefore, the first occurrence (FO) of D. cylindraceum is conspicuously below the traditional base of the Maastrichtian as defined by the FO of the belemnite Belemnella lanceolata. Indeed, this is also far below the boundary designated in the Global Stratotype Section at Tercis les Bains (Landes, France). A comparison of the FOs of D. cylindraceum in sections across Europe clearly shows a significant diachroneity, which diminishes its value for definition of the Campanian/Maastrichtian boundary. © 2015, Polish Geological Institute. All rights reserved.

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