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Sur la nature des Chitinozoaires

100%

Kozlowski R.

Acta Palaeontologica Polonica

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1963

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tom 08

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nr 4

En se basant sur de très abondants matériaux de Chitinozoaires, extraits principalement des galets erratiques ordoviciens, I'auteur a fait une étude morphologique détaillée de 5 représentants typiques de ce groupe de microfossiles énigmatiques. Dans les matériaux rassemblés, outre des logettes isolées, ont été trouvés des assemblages de logettes, jusqu'ici inconnus, appartenant à Desmochitina minor Eis., Cyathochitina campanulaeformis Eis. et Parachitina curvata Eis. L'auteur conclut que: 1° tous les Chitinozoaires formaient vraisemblablement des assemblages, 2° leurs logettes correspondent selon toute probabilité, à des oeufs ou à des sacs ovigères des Métazoaires, et 3° des formes morphologiquement identiques ou voisines des Chitinozoaires sont inconnues dans la faune d'aujourd'hui.

2

Sur certains fossiles Ordoviciens a test organique

100%

Kozlowski R.

Acta Palaeontologica Polonica

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1967

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tom 12

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nr 2

Sont décrits différents menus fossiles ordoviciens à test organique, classés en 11 espèces, réparties entre 9 genres. Toutes les espèces et 7 genres sont considérés comme taxons nouveaux. La position systématique de la plupart d'entre eux reste néanmoins incertaine. Microphysallis n.sp. est considéré comme un Protozoaire. Le genre Byronia Matthew correspond très probablement à la thèque du polype d'un Scyphozoaire. La nature de Microsyrinx n.gen. et d'Ascosyrinx n.gen. reste indéterminée. Helicosyrinx n.gen. pourrait bien être le tube d'un Phoronoïdien. Ivanovites n.gen. et Sokolovites n.gen. sont presque certainement des tubes de Pogonophores. Pterobranchites n.gen. est considéré comme un représentant des Cephalodiscoidea, et Rhabdopleurites n.gen. comme un représentant des Rhabdopleuroidea.

3

Photography in the ultraviolet and visible violet spectra: Unravelling methods and applications in palaeontology

84%

Crippa G., Masini S.

Acta Palaeontologica Polonica

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2022

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tom 67

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nr 3

4

The genus Leiostyla (Gastropoda: Pulmonata) - relationships and distribution

84%

Pokryszko B. M., Falniowski A., Cameron R. A. D.

Folia Malacologica

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2012

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tom 20

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nr 1

5

A new species of rust fungi from the middle Eocene Sakhalinian amber

84%

Tykhonenko Y., Hayova V., Ignatov M., Vasilenko D., Perkovsky E. E.

Acta Palaeontologica Polonica

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2021

|

tom 66

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nr 4

6

The first possible remingtonocetid stem whale from North America

84%

Uhen M. D., Peredo C. M.

Acta Palaeontologica Polonica

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2021

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tom 66

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nr 1

7

Discovery of a crocodyliform tooth from the upper Eocene Ergilin Dzo Formation, Mongolia

84%

Iijima M., Tsubamoto T., Tsogtbaatar K., Chinzorig T., Baasankhuu S.

Acta Palaeontologica Polonica

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2019

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tom 64

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nr 4

Although the distribution of Asian crocodyliforms was extended northwards during the Paleocene–Eocene greenhouse world, the fossil record in northern Asia becomes scarce towards the end of the Eocene. We here report the first crocodyliform (an isolated tooth) from the upper Eocene Ergilin Dzo Formation of southeastern Mongolia, the mammalian fauna of which defines the Ergilian Asian Land Mammal Age. The conical non-recurved crown, the near complete root with the central resorption facet, and its late Eocene age suggest the crocodyliform affinity of the tooth. The current finding represents one of the northernmost occurrences of crocodyliforms in the upper Eocene of Asia (paleolatitude ca. 49°30’ N), and demonstrates that SE Mongolia probably met thermal requirements of crocodyliforms during the late Eocene.

8

Revealing body proportions of the enigmatic choristodere reptile Khurendukhosaurus from Mongolia

84%

Matsumoto R., Tsogtbaatar K., Ishigaki S., Tsogtbaatar C., Enkhtaivan Z., Evans S. E.

Acta Palaeontologica Polonica

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2019

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tom 64

|

nr 2

Khurendukhosaurus is an enigmatic genus of choristodere, recorded from the Lower Cretaceous of East Asia, Mongolia, and Siberian Russia. Until now, it was known only from isolated skull and postcranial elements, limiting comparison with other genera. Three major morphotypes have been recognised within Choristodera: longirostrine neochoristoderes with short-necks, and brevirostrine non-neochoristoderes with either short or long necks. The morphotype of Khurendukhosaurus was uncertain, although it had been inferred to be long-necked, based on cervical and caudal vertebral morphology shared with the Chinese Hyphalosaurus and on the results of phylogenetic analysis that placed it within a clade of Sino-Japanese long-necked taxa. Newly discovered material from the Mongolian type locality, Khuren-Dukh, preserves most major postcranial elements of a single individual. This specimen confirms that Khurendukhosaurus belongs to the long-necked morphotype, in having at least 13 cervical vertebrae. Moreover, a new phylogenetic analysis supports the placement of Khurendukhosaurus as a sister group of the Hyphalosaurus + Shokawa clade. Based on the new material, Khurendukhosaurus is estimated to have been roughly 1 m in total length, placing it at the upper end of the size range for long-necked choristoderes.

9

The sequence of graptolite faunas in the Ordovician of the Shelve Inlier, Welsh Borderland

84%

Strachan I.

Acta Palaeontologica Polonica

|

1981

|

tom 26

|

nr 1

10

Ultrastructure of the jaws of the fossil and recent Eunicida (Polychaeta)

84%

Mierzejewska G., Mierzejewski P.

Acta Palaeontologica Polonica

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1978

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tom 23

|

nr 3

The ultrastructure of the jaws of Ordovician, Silurian, Permian and Recent Eunicida (Polychaeta) have been studied by transmission and scanning electron microscopy. Primary and secondary zones have been distinguished in the ultrastructure of the jaws. The primary zone is formed of the pharyngeal cuticle containing an orthogonal network of collagen fibrils, while the secondary zone, underlying the primary one, is developed of inner part of the pharyngeal cuticle devoid of a regular network of collagen fibrils. The two zones are pierced by microvilli. The jaws of placognath Eunicida are structured of the primary zone only. The Eunicida with highly organized jaw apparatus have a strongly developed secondary zone underlying the primary one. A preliminary correlation of evolutionary changes in the anatomy and ultrastructure of the jaws of Eunicida has been conducted. It has also been shown that the ultrastructural studies of the scolecodonts were not very useful for taxonomic purposes.

11

Trapa praehungarica, a new fossil species from the Upper Pannonian of Hungary

84%

Wojcicki J. J., Bajzath J.

Acta Palaeobotanica

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1997

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tom 37

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nr 1

12

A new fossil species from the genus Falsomordellistena Ermisch, 1941 [Coleoptera, Mordellidae] with description of a new subgenus

84%

Kubisz D.

Acta Zoologica Cracoviensia

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2003

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tom 46

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nr Suppl.

Falsomordellistena eocenica sp. nov. from the Baltic amber is described and placed in the new subgenus Palaeostena subgen. nov.

13

A new pliosaurid from the Oxford Clay Formation of Oxfordshire, UK

67%

Ketchum H. F., Benson R. B. J.

Acta Palaeontologica Polonica

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2022

|

tom 67

|

nr 2

14

New materials of multicellular algae from the earliest Cambrian Kuanchuanpu biota in South China

67%

Tang Q.-Q., Zheng Y.-J., Qin S., Wang Y.-C., Yang X.-G., Wang X., Sun J., Uesugi K., Komiya T., Han J.

Acta Palaeontologica Polonica

|

2022

|

tom 67

|

nr 2

15

The most complete amiid fish from the Coal Creek Member of the Eocene Kishenehn Formation in northwestern Montana

67%

Gardner J. D., Wilson M. V. H.

Acta Palaeontologica Polonica

|

2022

|

tom 67

|

nr 2

16

Sexually dimorphic ornamentation in modern spinicaudatans and the taxonomic implications for fossil clam shrimps

67%

Sun X., Cheng J.

Acta Palaeontologica Polonica

|

2022

|

tom 67

|

nr 2

17

Diversity of chondrostean fish Coccolepis from the Late Jurassic Solnhofen Archipelago, Southern Germany

67%

Lopez-Arbarello A., Ebert M.

Acta Palaeontologica Polonica

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2021

|

tom 66

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nr 4

18

Two new basal coelurosaurian theropod dinosaurs from the Lower Cretaceous Sao Khua Formation of Thailand

67%

Samathi A., Chanthasit P., Sander P. M.

Acta Palaeontologica Polonica

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2019

|

tom 64

|

nr 2

Megaraptora is a clade of mid to large-sized theropods that are long-snouted, large-clawed, highly pneumatized, and have long and gracile metatarsals. The basal member was reported from the Barremian of Japan. A more derived clade, the Megaraptoridae, is known from the Cenomanian to Santonian of Gondwana. Here two new basal coelurosaurs from the Lower Cretaceous Sao Khua Formation of Thailand are described and named as Phuwiangvenator yaemniyomi gen. et sp. nov. and Vayuraptor nongbualamphuensis gen. et sp. nov. Phuwiangvenator is a megaraptoran coelurosaur and diagnosed by the ventrally flat sacral vertebrae with sulci in the anterior and posterior region of the centra and the anterior rim of metatarsal IV sloping proximolaterally to distomedially and being much lower than that of metatarsal III anteriorly. Vayuraptor is a basal coelurosaur and diagnosed by its astragalus which has two horizontal grooves, two fossae at the base of the ascending process, the ascending process being straight laterally and straight and parallel medially with the medial rim sloping to the tip laterally, and a long and slender astragalar ascending process. Although the position of the basal coelurosaur Vayuraptor remains unclear and must await further discovery, megaraptoran affinities are likely. The Early Cretaceous megaraptoran fossil record has been recovered from the Barremian to Aptian of Asia. All Asian megaraptorans might be a monophyletic clade or a paraphyletic series relative to the Megaraptoridae. Several specimens have been reported from the Aptian to mid-Cretaceous of Australia, and one report from the Albian of South America. These fossils show a high diversity of the Early Cretaceous megaraptorans and a wide distribution during that time. The clade then became more provincial in the Late Cretaceous.

19

Comment on “Aysheaia prolata from the Utah Wheeler Formation (Drumian, Cambrian) is a frontal appendage of the radiodontan Stanleycaris” by Stephen Pates, Allison C. Daley, and Javier Ortega-Hernández

67%

Vintaned J. A. G., Zhuralev A. Y.

Acta Palaeontologica Polonica

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2018

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tom 63

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nr 1

Pates et al. (2017) and Pates and Daley (2017) reinterpreted a number of presumable xenusians (lobopodians) and described some new fossils from various Cambrian Lagerstätten as radiodontan (anomalocaridid) frontal appendages. The authors suggested that some features including overall length of a specimen, a number of tentative podomeres, a number of ventral blades (spines) and dorsal spines, their morphology, and an angle between the dorsal and ventral surfaces (θ) of a specimen provide enough information for a fairly good morphological description and a relevant systematic interpretation of stem group ecdysozoans. The case of xenusian Mureropodia apae from the lower Cambrian Valdemiedes Formation of Murero, northeastern Spain (Gámez Vintaned et al. 2011), which Pates and Daley (2017) identified as radiodontan Caryosyntrips cf. camurus, does not verify a plausibility of such a reductive approach.

20

A new Mississippian hexactinellid sponge from the western Gondwana: Taxonomic and paleobiogeographic implications

67%

Carrera M. G., Rustan J. J., Vaccari N. E., Ezpeleta M.

Acta Palaeontologica Polonica

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2018

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tom 63

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nr 1

A Mississippian hexactinellid sponge from the western Argentina improves the extremely poor late Paleozoic sponge records from Gondwana. The sponge is included in the subfamily Thysanodictyinae of family Dictyospongiidae. The new genus and species Minitaspongia parvis is erected, and its well-preserved spicular structure is described in detail representing the first approximation of the spicule assemblage in Thysanodictyinae. The skeleton is clathrate, three-dimensional with at least two ranks of rectangular openings. This first report of this subfamily outside North America represents the best-known hexactinellid and the first dictyosponge record from the Carboniferous of Gondwana. Unlike the occurrences of Thysanodictyinae in North America, with thick skeletons linked to high-energy shallow water settings, Minitaspongia occurs in low-energy water siliciclastic settings related to a cold climate and glacimarine deposits. Accordingly, the complex wall structure of this sponge should not be invoked as a necessary adaptation to high energy and shallow water settings.

Ograniczanie wyników

Sur la nature des Chitinozoaires

Sur certains fossiles Ordoviciens a test organique

Photography in the ultraviolet and visible violet spectra: Unravelling methods and applications in palaeontology

The genus Leiostyla (Gastropoda: Pulmonata) - relationships and distribution

A new species of rust fungi from the middle Eocene Sakhalinian amber

The first possible remingtonocetid stem whale from North America

Discovery of a crocodyliform tooth from the upper Eocene Ergilin Dzo Formation, Mongolia

Revealing body proportions of the enigmatic choristodere reptile Khurendukhosaurus from Mongolia

The sequence of graptolite faunas in the Ordovician of the Shelve Inlier, Welsh Borderland

Ultrastructure of the jaws of the fossil and recent Eunicida (Polychaeta)

Trapa praehungarica, a new fossil species from the Upper Pannonian of Hungary

A new fossil species from the genus Falsomordellistena Ermisch, 1941 [Coleoptera, Mordellidae] with description of a new subgenus

A new pliosaurid from the Oxford Clay Formation of Oxfordshire, UK

New materials of multicellular algae from the earliest Cambrian Kuanchuanpu biota in South China

The most complete amiid fish from the Coal Creek Member of the Eocene Kishenehn Formation in northwestern Montana

Sexually dimorphic ornamentation in modern spinicaudatans and the taxonomic implications for fossil clam shrimps

Diversity of chondrostean fish Coccolepis from the Late Jurassic Solnhofen Archipelago, Southern Germany

Two new basal coelurosaurian theropod dinosaurs from the Lower Cretaceous Sao Khua Formation of Thailand

Comment on “Aysheaia prolata from the Utah Wheeler Formation (Drumian, Cambrian) is a frontal appendage of the radiodontan Stanleycaris” by Stephen Pates, Allison C. Daley, and Javier Ortega-Hernández

A new Mississippian hexactinellid sponge from the western Gondwana: Taxonomic and paleobiogeographic implications