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Tytuł:
Moles [Talpidae] from the late Middle Miocene of South Germany
Autorzy:
Ziegler, R
Powiązania:
https://bibliotekanauki.pl/articles/21675.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Myxomygale gracilis
Leptoscaptor robustior
Middle Miocene
Mammalia
Leptoscaptor bavaricum
Talpidae
Germany
mole
Tenuibrachiatum storchi
paleontology
Opis:
The moles from the South German fissure fillings Petersbuch 6, 10, 18, 31, 35, 48 include 14 species, four of which are new: Leptoscaptor bavaricum gen. et sp. nov., Leptoscaptor robustior gen. et sp. nov., Myxomygale gracilis sp. nov. and Tenuibrachiatum storchi gen. et sp. nov. Most samples are characterised by their high species diversity. Talpa minuta is the most common species in nearly all samples. Leptoscaptor is characterised by a slender humerus and by the loss of lower antemolars. It is interpreted as a Miocene offshoot of the Scalopini. Myxomygale gracilis represents the latest record of the genus. Tenuibrachiatum storchi has a slender humerus and one lower incisor is lost. The species is structurally ancestral to the extant Urotrichus. The genus Pseudoparatalpa Lopatin, 1999 is considered a synonym of Paratalpa. The talpids of the Petersbuch fissures are in line with a Middle Miocene correlation of MN 7+8 as already indicated by the cricetids. The remains of desmans in the Petersbuch 6 fissure filling indicate the proximity of water. The presence of Urotrichini in nearly all samples, albeit scanty, suggests a forestal environment within the range of the owls, which preyed on them.
Źródło:
Acta Palaeontologica Polonica; 2003, 48, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A skull of a new pelecaniform bird from the Middle Eocene of Messel, Germany
Autorzy:
Mayr, G
Powiązania:
https://bibliotekanauki.pl/articles/22380.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
bird
Masillastega rectirostris
pelecaniform bird
aquatic bird
Eocene
Sulidae
Germany
Pelecaniformes
paleontology
Opis:
A skull of a new pelecaniform bird is described from the Middle Eocene of Messel (Germany). Masillastega rectirostris gen. et sp. nov. is tentatively referred to the Sulidae (boobies and gannets). If this assignment is correct, the new taxon would represent the earliest fossil record of the family, preceding Sula ronzoni Milne−Edwards, 1867 from the lowermost Oligocene of France by about 15 million years. Masillastega rectirostris most distinctly differs from extant Sulidae in the proportionally longer beak which indicates that the Eocene taxon was not adapted to plunge−diving. Contrary to extant Sulidae, which are exclusively marine birds, Masillastega rectirostris was found in a freshwater deposit. It is the first pelecaniform bird known from Messel and one of the few large birds discovered at this site.
Źródło:
Acta Palaeontologica Polonica; 2002, 47, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The first dsungaripterid pterosaur from the Kimmeridgian of Germany and the biomechanics of pterosaur long bones
Autorzy:
Fastnacht, M
Powiązania:
https://bibliotekanauki.pl/articles/19967.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Reptilia
biomechanics
Pterosauria
Dsungaripteridae
bone
Germany
long bone
Jurassic
pterosaur
paleontology
locomotion
Opis:
A partial vertebral column, pelvis and femora of a newly discovered pterosaur are described. The remains from the Upper Jurassic (Kimmeridgian) of Oker (northern Germany) can be identified as belonging to the Dsungaripteridae because the cross−sections of the bones have relatively thick walls. The close resemblance in morphology to the Lower Cretaceous Dsungaripterus allows identification of the specimen as the first and oldest record of dsungaripterids in Central Europe. Furthermore, it is the oldest certain record of a dsungaripterid pterosaur world wide. The biomechanical characteristics of the dsungaripterid long bone construction shows that it has less resistance against bending and torsion than in non−dsungaripteroid pterosaurs, but has greater strength against compression and local buckling. This supports former suggestions that dsungaripterids inhabited continental areas that required an active way of life including frequent take−off and landing phases. The reconstruction of the lever arms of the pelvic musculature and the mobility of the femur indicates a quadrupedal terrestrial locomotion.
Źródło:
Acta Palaeontologica Polonica; 2005, 50, 2
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Plesiosoricids from Early Oligocene fissure fillings in South Germany, with remarks on plesiosoricid phylogeny
Autorzy:
Ziegler, R
Powiązania:
https://bibliotekanauki.pl/articles/22761.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
plesiosoricid
Early Oligocene
Oligocene
paleontology
fissure filling
Germany
phylogenesis
Mammalia
Lipotyphla
Plesiosoricidae
Butselia
systematics
Opis:
The plesiosoricids from two fissure fillings from Möhren on the Franconian in South Germany are described. All belong to Butselia biveri. Möhren 12 correlates with the early Oligocene standard level Soumailles, corresponding to the Paleogene mammal unit MP 21, and Möhren 13 with the standard level Villebramar, which corresponds to MP 22. These occurrences represent the first record of the genus Butselia in Germany. A review of the known plesiosoricid species and a cladistic analysis of Butselia and Plesiosorex are presented. It shows the basal position of Butselia with respect to Plesiosorex, and the basal position of Plesiosorex soricinoides with respect to the other Plesiosorex species.
Źródło:
Acta Palaeontologica Polonica; 2009, 54, 3; 365-371
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Velociraptorine dromaeosaurid teeth from the Kimmeridgian [Late Jurassic] of Germany
Autorzy:
van der Lubbe, T
Richter, U.
Knotschke, N.
Powiązania:
https://bibliotekanauki.pl/articles/21506.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
velociraptorine dromaeosaurid
tooth
Kimmeridgian
Late Jurassic
Jurassic
Germany
Saurischia
Theropoda
Dromaeosauridae
dromaeosaurid
paleontology
Opis:
Six theropod teeth from a Late Jurassic (Kimmeridgian) bone bed in Langenberg Quarry of Oker (Goslar, Germany) are identified as a new dromaeosaurid taxon, here left in open nomenclature. Direct comparison reveals that the teeth are very similar to velociraptorine dromaeosaurid teeth from the Guimarota coal mine (Late Jurassic, Portugal) and to velociraptorine dromaeosaurid teeth from Uña (Barremian, Cuenca Province, Spain). Our data indicate that the teeth from the Kimmeridgian of Lower Saxony are of velociraptorine dromaeosaurid type, and therefore represent one of the oldest occurrences of the group Dromaeosauridae.
Źródło:
Acta Palaeontologica Polonica; 2009, 54, 3; 401-408
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Toward the origin of amniotes: Diadectomorph and synapsid footprints from the early Late Carboniferous of Germany
Autorzy:
Voigt, S.
Ganzelewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/20515.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
amniote
tetrapod
diadectomorph
footprint
Late Carboniferous
Carboniferous
paleontology
Germany
Ichniotherium
Dimetropus
Cotylosauria
tetrapod track
Opis:
Ichnotaxonomic revision of two extended sequences of large tetrapod footprints from the Westphalian A Bochum Formation of western Germany suggests assignment of the specimens to the well−known Permo−Carboniferous ichnogenera Ichniotherium and Dimetropus. Trackway parameters and imprint morphology strongly support basal diadectomorphs and “pelycosaurian”−grade synapsid reptiles, respectively, as the most likely trackmakers. The ichnofossils thereby extend the first appearance of these two important groups of basal tetrapods by about 5–10 million years, to the early Late Carboniferous, which is in accordance with the minimum age for the evolutionary origin of the clades following widely accepted phylogenetic analyses. These trackways provide not only direct evidence bearing on activity and behaviour of large terrestrial tetrapods close to the origin of amniotes, but also serve as a valuable benchmark for the assessment of controversially interpreted vertebrate tracks from other localities of similar age.
Źródło:
Acta Palaeontologica Polonica; 2010, 55, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The oldest representative of a brown frog [Ranidae] from the Early Miocene of Germany
Autorzy:
Bohme, M
Powiązania:
https://bibliotekanauki.pl/articles/21148.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Miocene
new fossil
locality
frog
Germany
morphology
Early Miocene
stratigraphy
Ranidae
brown frog
Europe
Late Pliocene
paleontology
Rana temporaria
Opis:
The brown frogs (Rana temporaria-group) are a monophyletic group in the family Ranidae, which have a scarce fossil record in Europe that begins only in the Late Pliocene. A new fossil from the Dietrichsberg locality (Germany, Thuringia) extends their stratigraphic range back to the Early Miocene, and suggests that their origin lies outside the Western Palaearctic, most probably in Asia, with subsequent immigration in the Burdigalian.
Źródło:
Acta Palaeontologica Polonica; 2001, 46, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neoselachian remains [Chondrichthyes, Elasmobranchii] from the Middle Jurassic of SW Germany and NW Poland
Autorzy:
Kriwet, J
Powiązania:
https://bibliotekanauki.pl/articles/22563.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Neoselachii
Middle Jurassic
locality
Polska
Germany
remains
Elasmobranchii
Folipistrix digitulus
taxonomy
Jurassic
Synechodus prorogatus
Chondrichthyes
diversity
neoselachian remains
distribution
paleontology
Opis:
New neoselachian remains from the Middle Jurassic of SW Germany and NW Poland are described. The locality of Weilen unter den Rinnen in SW Germany yielded only few orectolobiform teeth from the Aalenian representing at least one new genus and species, Folipistrix digitulus, which is assigned to the orectolobiforms and two additional orectolobiform teeth of uncertain affinities. The tooth morphology of Folipistrix gen. nov. indicates a cutting dentition and suggests specialised feeding habits. Neoselachians from Bathonian and Callovian drill core samples from NW Poland produced numerous selachian remains. Most teeth are damaged and only the crown is preserved. Few identifiable teeth come from uppermost lower to lower middle Callovian samples. They include a new species, Synechodus prorogatus, and rare teeth attributed to Palaeobrachaelurussp., Pseudospinax? sp., Protospinax cf. annectans Woodward, 1919, two additional but unidentifiable Protospinax spp. and Squalogaleussp. Scyliorhinids are represented only by few isolated tooth crowns. No batoid remains have been recovered. The two assemblages contribute to the knowledge about early neoselachian distribution and diversity.
Źródło:
Acta Palaeontologica Polonica; 2003, 48, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preservation of armoured scale insects on angiosperm leaves from the Eocene of Germany
Autorzy:
Wappler, T.
Ben-Dov, Y.
Powiązania:
https://bibliotekanauki.pl/articles/20619.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
preservation
insect
Insecta
angiosperm
leaf
Eocene
Germany
paleontology
Hemiptera
Coccoidea
plant-insect interaction
herbivore
parthenogenesis
fossil record
insect-plant association
Opis:
Of the 30 extant orders of insects, scale insects (Hemiptera: Coccoidea) have one of the best fossil records among insects that probably extends to the early Mesozoic. Most fossil Coccoidea records are of adult males which have been trapped in amber, whereas adult females are less common, probably because of their sedentary occurrence on plants. Descriptions, photos, and SEM micrographs are presented of over 250 well−preserved scale covers of adult females and nymphal stages of armoured scale insects (Hemiptera: Coccoidea: Diaspididae) which were found on dicotyledonous and monocotyledonous fossil leaves in Middle Eocene deposits from Germany. The structure of these fossil scale covers closely agrees with that of extant Diaspididae. These armoured scale insects belong to the subfamily Aspidiotinae. The age of this insect−plant association—47 to 44 million−year−old—indicates that the Diaspididae have a long history in the Palaearctic region.
Źródło:
Acta Palaeontologica Polonica; 2008, 53, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new pleurocystitid blastozoan from the Middle Devonian of the Eifel (Germany) and its phylogenetic importance
Autorzy:
Nardin, E.
Bohaty, J.
Powiązania:
https://bibliotekanauki.pl/articles/20422.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
new pleurocystitid blastozoan
blastozoan
Middle Devonian
Germany
phylogenetic importance
Echinodermata
Blastozoa
Pleurocystitidae
Regulaecystis
evolution
paleoecology
Eifelian
Devonian
Rhenish Massif
Opis:
Rich echinoderm fauna from the Middle Devonian of the Eifel (Rhenish Massif, Germany) has yielded specimens of the rare recumbent pleurocystitid rhombiferans. Regulaecystis testudineus sp. nov. extends the stratigraphic range of the pleurocystitids to the Eifelian (Middle Devonian). Specimens show a strongly inflated and ornamented theca, which is unusual for the European pleurocystitids. Phylogenetic analysis of all described pleurocystitid genera suggests a close relationship of Regulaecystis with the other Devonian genera. Results indicate that the degree of inflation and of ornamentation of the theca can be interpreted as convergences within the pleurocystitids due to environmental conditions (such as surface consistency, hydrodynamism). R. testudineus sp. nov. was living as a strict epibenthic vagile organism; lying on muddy soft to firm substrates in quiet to agitated shallow warm water environments.
Źródło:
Acta Palaeontologica Polonica; 2013, 58, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A symbiotic association of a boring polychaete and an echinoid from the Late Cretaceous of Germany
Autorzy:
Wisshak, M.
Neumann, C.
Powiązania:
https://bibliotekanauki.pl/articles/21643.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
paleontology
Germany
Cretaceous
Late Cretaceous
trace fossil
fossil
polychaete
Polychaeta
Spionidae
bioerosion
Maastrichtian
symbiotic association
echinoid
Caulostrepsis
Polydora
Echinocorys
Opis:
From the Early Maastrichtian white chalk of Rügen Island (N Germany), a specimen of the echinoid Echinocorys ovata featuring 27 boring traces of the ichnogenus Caulostrepsis is described. Individual traces are shallow to moderately deep U−shaped depressions and show distinct regeneration textures evidencing a syn−vivo infestation. All traces are located on the plastron between the peristome and periproct of the host echinoid, indicating an adaptation of the trace maker by choosing the most advantageous position of the specific host. The traces are attributed to the work of boring spionid polychaetes (Polydora complex), grounded on the close morphological resemblance with initial borings of Recent polydorids. This is the first evidence for a possible association of a boring polychaete not only with an echinoid but with an echinoderm in general. The symbiotic relationship was commensalistic in nature with the spionid probably taking advantage of organic matter resuspended by the echinoids locomotion and feeding activity and benefiting from effective shelter. For the host echinoid, the association was moderately harmful. The soft bottom environment of the chalk sea provided very limited hard substrate ecospace for settlers and bioeroders, available only in form of biogenic structures. Echinocorys was a dominant component of this benthic community and can be considered as a suitable host for symbiotic interactions because of its size and assumed longevity.
Źródło:
Acta Palaeontologica Polonica; 2006, 51, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Functional morphology and taphonomy of nautiloid beaks from the Middle Triassic of Southern Germany
Autorzy:
Klug, C
Powiązania:
https://bibliotekanauki.pl/articles/22638.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Muschelkalk
taphonomy
beak
Germany
Upper Muschelkalk
Middle Triassic
Germanonautilus
Conchorhynchus avirostris
Triassic
Rhyncholithes hirundo
fossil
rhyncholith
living chamber
nautiloid beak
deposit
paleontology
Nautilus
functional morphology
paleozoology
Opis:
New records of nautiloid beak elements conventionally classified as 'Rhyncholithes hirundo (Biguet, 1819)' and 'Conchorhynchus avirostris (von Schlotheim, 1820)' with carbonised (originally chitinous) three-dimensionally preserved appendages from the Upper Muschelkalk (Middle Triassic) of northern Württemberg (Southwest Germany) enable restoration of the complete beak of Germanonautilus. In three specimens, the lower mandible is embedded within the living chamber of Germanonautilus conchs, Beak elements of Germanonautilus differ from those of Recent Nautilus in the more elongate appendages of the fossil lower mandibles and the weaker sculpture on the originally chitinous parts. Furthermore, the dorsal sculpture of the fossil conchorhynchs consists of ridges rather than denticles and the ventral sculpture of the fossil rhyncholiths displays ridges in places where the Recent rhyncholiths have a smooth surface. Additionally, the fossil beak elements attained a larger size than their Recent counterparts, During transport of 'Rhyncholithes hirundo', the light chitinous parts served as a sail and the heavier conchorhynch anchored in the sediment causing alignment. In contrast to the irregularly embedded isolated rhyncholiths, the conchorhynchs usually settled with their ventral side up. From the study of 407 fossil nautiloid beak-elements, a significant variability of the hard parts is evident. Consequently, the assignment of specific morphologies to the species of Germanonautilus is impossible.
Zrekonstruowano aparat szczękowy łodzika z rodzaju Germanonautilus wykorzystując nowe materiały z górnego wapienia muszlowego (środkowy trias) północnej Wirtembergii (południowo-zachodnie Niemcy). Opisane elementy aparatu szczękowego Germanonautilus, tradycyjnie klasyfikowane jako „Rhyncholites hirundo (Biguet, 1819)” oraz „Conchorhynchus avirostris (von Schlotheim, 1820)”, są dobrze zachowane, niekiedy ze zwęglonymi, pierwotnie chitynowymi wyrostkami. Trzy okazy dolnej szczęki znaleziono w komorze mieszkalnej Germanonautilus, co potwierdza powiązanie opisanych elementów aparatu szczękowego z tym rodzajem łodzika. W porównaniu ze współcześnie żyjącym łodzikiem z rodzaju Nautilus, elementy dolnej szczęki Germanonautilus mają bardziej wydłużone wyrostki i mniej wydatne urzeźbienie części pierwotnie organicznych, oraz urzeźbienie grzbietowej części elementów zmieneralizowanych (konchorynchów) w postaci grzbiecików, a nie ząbków jak u Nautilus. Pierwotnie organiczne elementy górnej szczęki u Germanonautilus oraz współczesnego łodzika są bardzo podobne, natomiast części zmineralizowane górnych szczęk (ryncholity) Germanonautilus różnią się bardziej rozciągniętą pokrywą oraz wydatną rzeźbą części brzusznej w postaci grzbiecików (u Nautilus element ten jest gładki). W czasie pośmiertnego transportu pierwotnie organiczne i lżejsze elementy górnej szczęki Germanonautilus działały zapewne jak żagiel, natomiast cięższe elementy szczęki dolnej kotwiczyły się w osadzie, powodując doprądową orientacje skamieniałości. Po rozkładzie części organicznych, elementy aparatu ulegały rozproszeniu, jednak o ile ryncholity znajdowane są w osadzie w rozmaitym położeniu, to konchorynchy położone są najczęściej stroną brzuszną do góry.
Źródło:
Acta Palaeontologica Polonica; 2001, 46, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Soft-tissue attachments in orthocerid and bactritid cephalopods from the Early and Middle Devonian of Germany and Morocco
Autorzy:
Kroger, B
Klug, C.
Mapes, R.
Powiązania:
https://bibliotekanauki.pl/articles/20326.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Cephalopoda
Germany
Orthocerida
Emsian
Morocco
Middle Devonian
soft tissue attachment
Early Devonian
Bactritida
muscle scar
Eifelian
Devonian
cephalopod
paleontology
Opis:
In the Early to Middle Devonian shale sequences of Germany and Morocco, pyritised and secondarily limonitised cephalopod remains are common. Details of the soft−tissue attachment structures are sometimes preserved on the internal moulds of the body chamber and phragmocone of these cephalopods. Some of the studied Orthocerida show a very faint annular elevation and a dorsal furrow. A few Bactritida show a distinctive annular elevation with two circular bands. The bands form a paired or threefold lobe at the dorsum of the shell. Morphological differences between Orthocerida and Bactritida suggest different soft part morphologies. A comparison of the attachment scars shows that the Bactritida are intermediate between the Orthocerida and ammonoids with regard to their muscle attachment scars. The shape of the muscle scars are interpreted as indication for a planktonic lifestyle in Orthocerida and a comparatively active, nektonic lifestyle in Bactritida and ammonoids. The new genus Acanthomichelinoceras is erected. Acanthomichelinoceras commutatum, Cycloceras sp., Bactrites gracile, Bactrites sp. A, Bactrites sp. B, and Bactrites sp. C are described.
Źródło:
Acta Palaeontologica Polonica; 2005, 50, 2
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The taxonomy and anatomy of rauisuchian archosaur from the Late Triassic of Germany and Poland
Autorzy:
Brusatte, S L
Butler, R.J.
Sulej, T.
Niedzwiedzki, G.
Powiązania:
https://bibliotekanauki.pl/articles/21870.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
taxonomy
paleontology
rauisuchian archosaur
archosaur
Late Triassic
Germany
Polska
Teratosaurus suevicus
Teratosaurus silesiacus
Postosuchus kirkpatricki
Polonosuchus
Archosauria
Rauisuchia
Triassic
anatomy
Opis:
The German Late Triassic archosaur Teratosaurus suevicus is a historically important taxon, being the first described rauisuchian. Unfortunately the holotype is a single element, a maxilla, which is poorly preserved and incomplete. We redescribe this maxilla and identify a single potential autapomorphy. The fragmentary type specimen complicates attempts to refer additional material to this taxon, and other unassociated archosaur and rauisuchian specimens from the Mittlerer Stubensandstein of Germany cannot be referred to T. suevicus with any degree of confidence. The stratigraphically older T. silesiacus, from the upper Carnian of Poland, is represented by a much more complete and better preserved specimen. Comparison of the maxillae of T. suevicus and T. silesiacus reveals that the two are distinct taxa, contra recent suggestions, but also that they do not share any synapomorphies or a unique combination of characters relative to Postosuchus kirkpatricki and other rauisuchians. Thus, the Polish material must be transferred to a new genus, Polonosuchus gen. nov. Both Polonosuchus and Teratosaurus are very similar to Postosuchus kirkpatricki, and the three taxa are likely closely related.
Źródło:
Acta Palaeontologica Polonica; 2009, 54, 2; 221-230
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The phylogenetic position of the ornithischian dinosaur Stenopelix valdensis from the Lower Cretaceous of Germany and the early fossil record of Pachycephalosauria
Autorzy:
Butler, R J
Sullivan, R.M.
Powiązania:
https://bibliotekanauki.pl/articles/21353.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Cretaceous
Dinosauria
ornithischian dinosaur
fossil
paleontology
Pachycephalosauria
Ornithischia
Germany
phylogenetic position
Marginocephalia
Lower Cretaceous
dinosaur
Stenopelix valdensis
Opis:
The holotype of Stenopelix valdensis is the most completely known dinosaur specimen from the “Wealden” (Lower Cretaceous) of northwestern Germany, but its phylogenetic position has remained highly controversial. Most recent authors have suggested affinities with the ornithischian clade Marginocephalia, and most commonly to the marginocephalian subclade Pachycephalosauria. A pachycephalosaurian identity would make Stenopelix the only confirmed pre−Late Cretaceous member of this clade, breaking up an extensive ghost lineage which extends to the inferred origin of Pachycephalosauria in the Middle–Late Jurassic. Based upon re−examination of the holotype we here review the characters that have previously been used to assign Stenopelix to either Pachycephalosauria or Ceratopsia. All of these characters are problematic, being based upon inaccurate anatomical interpretations, or having more widespread distributions within Ornithischia than previously realised. We conclude that although the overall anatomy of Stenopelix is consistent with marginocephalian affinities, there is insufficient evidence to support referral to either Pachycephalosauria or Ceratopsia; we consider Stenopelix ?Marginocephalia. A brief review indicates that there is no compelling fossil evidence for pachycephalosaurs prior to the Late Cretaceous.
Źródło:
Acta Palaeontologica Polonica; 2009, 54, 1; 21-34
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
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