scholarly journals Note on the Rhaetian fish fauna from a subrosion pipe in Winterswijk (the Netherlands), with a discussion on the validity of the genus Severnichthys Storrs, 1994

2021 ◽  
Vol 100 ◽  
Author(s):  
Henk J. Diependaal ◽  
Jelle W.F. Reumer
Keyword(s):  
The Netherlands ◽  
Fish Fauna ◽  
Late Triassic ◽  
Great Similarity ◽  
Fossil Remains ◽  
Nomen Dubium

Abstract Fossil remains of fishes found in Rhaetian (Late Triassic, c.208.5–201.3 Ma) sediments collected from a subrosion pipe in the Winterswijk quarry are described. The fauna shows great similarity to material known from the British Triassic of the Penarth Group and from other localities in Northwestern Europe. Both chondrichthyan and osteichthyan teeth and scales are present. Most abundant are the sharks Lissodus minimus and Rhomphaiodon minor and the actinopterygians Gyrolepis albertii, Saurichthys longidens and Birgeria acuminata. Isolated teeth of the latter two taxa were known under the name Severnichthys acuminatus, but the genus Severnichthys is here considered a nomen dubium; it should be suppressed in order to make the taxonomy less complicated.

Taxonomy and phylogeny of the Triassic bivalve families Mysidiellidae Cox, 1964 and Healeyidae new family

2008 ◽  
Vol 82 (3) ◽  
pp. 555-564 ◽  
Author(s):  
M. Hautmann
Keyword(s):  
Outer Shell ◽  
Junior Synonym ◽  
Late Triassic ◽  
Late Paleozoic ◽  
Great Similarity ◽  
Shell Layer ◽  
Shell Microstructure ◽  
General Shape ◽  
New Family

The Mysidiellidae are morphologically isolated among Triassic bivalves but share important characters with Late Paleozoic Ambonychioidea. Apart from a great similarity in the general shape of the shell, the most primitive mysidiellid genus Promysidiella resembles ambonychioids in the presence of a duplivincular-opisthodetic ligament system. Within the Mysidiellidae, this ligament type evolved into the transitional ligament system that characterizes Late Triassic Mysidiella. The phyletic polarity indicates that this evolution probably took place by paedomorphosis. New examinations of the shell microstructure of Mysidiella demonstrate the presence of simple prismatic and possibly foliated structures in the calcitic outer shell layer, which further supports an ambonychioid affinity. Therefore, the Mysidiellidae are removed from the Mytiloidea and assigned to the Ambonychioidea. The poorly known genus Protopis, which was originally included in the Mysidiellidae, probably had a parivincular ligament system and was hence a member of the Heteroconchia. Joannina, which was previously considered a junior synonym of Protopis, is re-established. The hinge margin of Joannina carries a well developed nymph but lacks teeth. These characters as well as its modioliform shape, anterior shell lobe, and pronounced diagonal carina link Joannina with the Late Triassic genus Healeya (Modiomorphoidea). Both taxa are herein placed in the new family Healeyidae, which differs from the morphologically similar Kalenteridae in the absence of elaborated hinge teeth. Protopis, as well as the recently described genera Leidapoconcha, Waijiaoella, and Qingyaniola, are tentatively assigned to the Healeyidae.

A new genus of ichthyosaur from the Late Triassic Pardonet Formation of British Columbia: bridging the Triassic Jurassic gap

2001 ◽  
Vol 38 (6) ◽  
pp. 983-1002 ◽  
Author(s):  
Elizabeth L Nicholls ◽  
Makoto Manabe
Keyword(s):  
British Columbia ◽  
Type Species ◽  
New Genus ◽  
Late Triassic ◽  
Unique Combination ◽  
Type Specimens ◽  
Nomen Dubium ◽  
The Family ◽  
Large Diamond

Both the genus Shastasaurus and the family Shastasauridae have long been hard to define due to the fragmentary nature of the type specimens. Consequently, recent interpretations of the genus have been based almost entirely on Shastasaurus neoscapularis from the Late Triassic Pardonet Formation of British Columbia. Two new specimens of this taxon, from Pink Mountain, British Columbia, demonstrate that it does not belong in the genus Shastasaurus. This paper describes the new specimens, and refers the species to Metashastasaurus gen nov. Post-cranially, the skeleton of Metashastasaurus resembles that of shastasaurids, differing primarily only in the shape of the scapula and fibula. However, the skull has a unique combination of characters, including large diamond-shaped frontals that enter the supratemporal fenestrae, and very narrow posterior extensions of the nasals, which contact the postfrontals. It also differs from the skull of Shastasaurus in the presence of both a parietal ridge and postparietal shelf. This is a combination of derived characters previously known only in Jurassic forms. The front limb has four proximal carpals and four digits, indicating that previous reconstructions were based on incomplete material. Shastasaurus pacificus Merriam 1895, the type species of the genus Shastasaurus, must be considered a nomen dubium, making the genus Shastasaurus invalid. Until this problem is clarified, the use of the generic name Shastasaurus should be restricted to Merriam's type specimens, of which only Shastasaurus alexandrae and Shastasaurus osmonti are based on adequate material.

scholarly journals On the tides, bed and coasts of the North Sea or German Ocean

1854 ◽  
Vol 6 ◽  
pp. 201-202
Keyword(s):  
The Netherlands ◽  
North Sea ◽  
The Other ◽  
Great Similarity ◽  
Shetland Islands ◽  
Norwegian Coast ◽  
The North ◽  
The North Sea ◽  
The Baltic ◽  
Long Channel

The author commences his paper by remarking that great similarity of outline pervades the western shores of Ireland, Scotland and Norway, and then observes that the great Atlantic flood-tide wave, having traversed the shores of the former countries, strikes with great fury the Norwegian coast between the Lafoden Isles and Stadland, one portion proceeding to the north, while the other is deflected to the south, which last has scooped out along the coast, as far as the Sleeve at the mouth of the Baltic, a long channel from 100 to 200 fathoms in depth, almost close in shore, and varying from 50 to 100 miles in width. After describing his method of contouring and colouring the Admiralty chart of the North Sea, he traces the course of the tide-wave among the Orkney and Shetland Islands along the eastern shores of Scotland and England to the Straits of Dover, and along the western shores of Norway, Denmark and the Netherlands, to the same point.

scholarly journals Revision of Erpetosuchus (Archosauria: Pseudosuchia) and new erpetosuchid material from the Late Triassic ‘Elgin Reptile’ fauna based on μCT scanning techniques

2020 ◽  
pp. 1-25
Author(s):  
Davide FOFFA ◽  
Richard J. BUTLER ◽  
Sterling J. NESBITT ◽  
Stig WALSH ◽  
Paul M. BARRETT ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Phylogenetic Relationships ◽  
Late Triassic ◽  
New Taxon ◽  
Micro Computed Tomography ◽  
Fossil Remains ◽  
New Information ◽  
Sandstone Formation ◽  
Shed Light

ABSTRACT The Late Triassic fauna of the Lossiemouth Sandstone Formation (LSF) from the Elgin area, Scotland, has been pivotal in expanding our understanding of Triassic terrestrial tetrapods. Frustratingly, due to their odd preservation, interpretations of the Elgin Triassic specimens have relied on destructive moulding techniques, which only provide incomplete, and potentially distorted, information. Here, we show that micro-computed tomography (μCT) could revitalise the study of this important assemblage. We describe a long-neglected specimen that was originally identified as a pseudosuchian archosaur, Ornithosuchus woodwardi. μCT scans revealed dozens of bones belonging to at least two taxa: a small-bodied pseudosuchian and a specimen of the procolophonid Leptopleuron lacertinum. The pseudosuchian skeleton possesses a combination of characters that are unique to the clade Erpetosuchidae. As a basis for investigating the phylogenetic relationships of this new specimen, we reviewed the anatomy, taxonomy and systematics of other erpetosuchid specimens from the LSF (all previously referred to Erpetosuchus). Unfortunately, due to the differing representation of the skeleton in the available Erpetosuchus specimens, we cannot determine whether the erpetosuchid specimen we describe here belongs to Erpetosuchus granti (to which we show it is closely related) or if it represents a distinct new taxon. Nevertheless, our results shed light on rarely preserved details of erpetosuchid anatomy. Finally, the unanticipated new information extracted from both previously studied and neglected specimens suggests that fossil remains may be much more widely distributed in the Elgin quarries than previously recognised, and that the richness of the LSF might have been underestimated.

Late Triassic (Rhaetian) ophiuroids from Winterswijk, the Netherlands; with comments on the systematic position of Aplocoma (Echinodermata, Ophiolepididae)*

Zoosymposia ◽  
2012 ◽  
Vol 7 (1) ◽  
pp. 163-172 ◽  
Author(s):  
BEN THUY ◽  
ADIËL A. KLOMPMAKER ◽  
JOHN W.M. JAGT
Keyword(s):  
The Netherlands ◽  
Middle Triassic ◽  
Systematic Position ◽  
Point Of View ◽  
Type Material ◽  
Late Triassic ◽  
The Family ◽  
Salinity Levels ◽  
Bottom Waters ◽  
Almost All

An ophiuroid assemblage from Rhaetian dark shales in a subrosion pipe (or sinkhole) penetrating middle Triassic (Muschel­kalk) strata, and, outside the subrosion pipe, disconcordantly overlying middle Triassic strata, east of Winterswijk, the Netherlands, is described, discussed and assessed taxonomically. The material consists of nearly intact and articulated as well as wholly disintegrated skeletons, almost all of which are pyritised, yet so well preserved that the diagnostic char­acters could be studied in detail. All specimens belong to Aplocoma agassizi (von Münster, 1839). Examination of the type material of Ophiolepis damesii Wright, 1874 (housed at the Roemer and Pelizäus Museum in Hildesheim, Germany, collection numbers NKP 7821 to NKP 7828) from Rhaetian strata at Hildesheim, Germany, comparable to those exposed at Winterswijk, has revealed that O. damesii is to be considered a nomen dubium due to the insufficient preservation of the type material. Based on the present lot, which documents the first Triassic echinoderms from the well-known Winterswijk quarry complex, we suggest that the genus Aplocoma is best reassigned to the family Ophiolepididae, in proximity to the extant Ophiozonella, and that the family Aplocomidae is to be suppressed. From a palaeoecological point of view, the Winterswijk assemblage illustrates preservation under the influence of storms in an otherwise very quiet environment; it is here interpreted as a monospecific assemblage amidst an oligospecific bivalve community in a near-coastal, shallow, muddy setting with fluctuating or low salinity levels and/or dysoxic bottom waters.

XI.—The Fish-Fauna of the Cementstones of Foulden, Berwickshire

1927 ◽  
Vol 55 (1) ◽  
pp. 255-287 ◽  
Author(s):  
Errol Ivor White
Keyword(s):  
Fish Fauna ◽  
Lower Carboniferous ◽  
Fossil Remains

So barren of fossil remains is the Cementstone Group of the Scottish Lower Carboniferous Rocks that any addition to our knowledge of the fauna and flora of the period is especially welcome. The list of vertebrate remains is notably meagre, and such as have been found, e.g. at Abden, are generally very fragmentary.The collection to be described below contained nearly 150 specimens, and includes Plants, Lamellibranchs, Annelids, Arthropods, and Fishes: of these the Plants and Fishes are by far the most important, and constitute more than two-thirds ot the total number of specimens.

scholarly journals <i>Ankumia</i> van Veen, 1932 retained and not replaced by the junior taxon <i>Platella</i> Coryell & Fields, 1937 (Ostracoda, Platycopina, Cytherelloidea)

2004 ◽  
Vol 23 (2) ◽  
pp. 163-163 ◽  
Author(s):  
Heinz Malz ◽  
Alan Lord
Keyword(s):  
The Netherlands ◽  
Type Species ◽  
The Other ◽  
Panama Canal ◽  
New Combination ◽  
Canal Zone ◽  
Nomen Dubium ◽  
Panama Canal Zone ◽  
The World ◽  
Relationship Of

Abstract. Recently, the monotypic ostracod genus Ankumia van Veen, 1932 was abandoned as nomen dubium by Jones (2003, p. 85) in favour of Platella Coryell &amp; Fields, 1937 and a new combination was proposed for the type species of Ankumia, i.e. Platella bosqueti (van Veen, 1932). However, Ankumia bosqueti from the Maastrichtian of The Netherlands was introduced as an available taxon and, as documented by Jones (2003), the specific name is valid for recognizing the species in which ‘pathological individuals with retained moults’ occur. Therefore, there is no reason to treat Ankumia as nomen dubium. Yet, although there is no doubt about the cytherellid relationship of the species, two taxonomical questions still remain.(1) Do pathological individuals of cytherellids justify specific and/or generic ranking? Certainly they do not, and demonstration of a corresponding ‘normal’ species (including ‘pathological individuals’) among the associated cytherellids is wanting. On the other hand, if these pathological individuals can be proven as representing a discrete pathological genus, Ankumia remains as a valid genus to characterize the available species name bosqueti.(2) Why should Ankumia be abandoned in favour of Platella? When van den Bold (1967, pp. 306, 308) compared Coryell &amp; Fields’ original Gatún ostracod fauna with his own collection from the Neogene Gatún Formation in the Panama Canal Zone, he recognized the type species, Platella gatunensis, as a small-sized cytherellid moult. Over the years about a dozen small- and normal-sized cytherellid species from all over the world have been assigned to Platella, ignoring the questionable taxonomic . . .

scholarly journals Palaeozoic and Mesozoic igneous activity in the Netherlands: a tectonomagmatic review

2004 ◽  
Vol 83 (2) ◽  
pp. 113-134 ◽  
Author(s):  
W. Sissingh
Keyword(s):  
The Netherlands ◽  
Plate Tectonics ◽  
Tectonic Stress ◽  
Late Triassic ◽  
Stress Regime ◽  
Production Wells ◽  
Exploration And Production ◽  
Igneous Activity ◽  
History Of ◽  
Early Late

AbstractTo date, igneous rocks, either intrusive or extrusive, have been encountered in the Palaeozoic-Mesozoic sedimentary series of the Netherlands in some 65 exploration and production wells. Following 17 new isotopic K/Ar age determinations of the recovered rock material (amounting to a total of 28 isotopic ages from 21 different wells), analysis of the stratigraphic distribution of the penetrated igneous rock bodies showed that the timing of their emplacement was importantly controlled by orogenic phases involving intra-plate wrench and rift tectonics. Magmatism coincided with the Acadian (Late Devonian), Sudetian (early Late Carboniferous), Saalian (Early Permian), Early Kimmerian (late Late Triassic), Mid-Kimmerian (Late Jurassic), Late Kimmerian (earliest Cretaceous) and Austrian (latest Early Cretaceous) tectonic phases. This synchroneity presumably reflects (broadly) coeval structural reorganizations of respectively the Baltica/Fennoscandinavia-Laurentia/Greenland, Laurussia-Gondwana, African-Eurasia and Greenland/Rockall-Eurasia plate assemblies. Through their concomitant changes of the intra-plate tectonic stress regime, inter-plate motions induced intra-plate tectonism and magmatism. These plate-tectonics related events determined the tectonomagmatic history of the Dutch realm by inducing the formation of localized centres, as well as isolated spot occurrences, of igneous activity. Some of these centres were active at (about) the same time. At a number of centres igneous activity re-occurred after a long period of time.

scholarly journals Eleven Bones: More Fossil Remains of Cave Lions and Cave Hyaenas from the North Sea Area

1983 ◽  
Vol 53 (1) ◽  
pp. 1-12 ◽  
Author(s):  
D.P. Bosscha Erdbrink
Keyword(s):  
The Netherlands ◽  
North Sea ◽  
The Other ◽  
Southwestern Part ◽  
Dutch Coast ◽  
Fossil Remains ◽  
The North ◽  
The North Sea ◽  
Sea Area

Six fossil Cave Lion bones and five fossil Cave Hyaena bones are described. One lion bone and one hyaena bone were dredged from the Westerschelde ( = Western Scheldt, southwestern part of the Netherlands). The other specimens were recovered from the bottom of the North Sea, in the area West and Southwest of the Brown Ridge (or Brown Bank), about 80 km West of IJmuiden on the Dutch coast.

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