Subjects -> PALEONTOLOGY (Total: 43 journals)
Showing 1 - 21 of 21 Journals sorted alphabetically
Alcheringa: An Australasian Journal of Palaeontology     Hybrid Journal   (Followers: 6)
Ameghiniana     Open Access  
Annales de Paléontologie     Full-text available via subscription   (Followers: 4)
Annals of Carnegie Museum     Full-text available via subscription   (Followers: 1)
Boreas: An International Journal of Quaternary Research     Hybrid Journal   (Followers: 13)
Comptes Rendus Palevol     Open Access  
European Journal of Protistology     Hybrid Journal   (Followers: 5)
EvoDevo     Open Access   (Followers: 4)
Facies     Hybrid Journal   (Followers: 9)
Fossil Record     Open Access   (Followers: 5)
Geobios     Full-text available via subscription   (Followers: 4)
Geologica Saxonica     Open Access   (Followers: 2)
Historical Biology: An International Journal of Paleobiology     Hybrid Journal   (Followers: 9)
Ichnos: An International Journal for Plant and Animal Traces     Hybrid Journal  
International Journal of Speleology     Open Access   (Followers: 3)
Journal of Paleolimnology     Hybrid Journal   (Followers: 5)
Journal of Paleontology     Hybrid Journal   (Followers: 8)
Journal of Quaternary Science     Hybrid Journal   (Followers: 31)
Journal of Vertebrate Paleontology     Full-text available via subscription   (Followers: 8)
Marine Micropaleontology     Hybrid Journal   (Followers: 2)
Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen     Full-text available via subscription   (Followers: 3)
Novitates Paleoentomologicae     Open Access   (Followers: 1)
Open Quaternary     Open Access  
Palaeogeography, Palaeoclimatology, Palaeoecology     Hybrid Journal   (Followers: 13)
Palaeontographica A     Full-text available via subscription   (Followers: 3)
Palaeontology     Hybrid Journal   (Followers: 17)
Palaeoworld     Hybrid Journal   (Followers: 3)
Paläontologische Zeitschrift     Hybrid Journal   (Followers: 4)
Paleobiology     Full-text available via subscription   (Followers: 6)
PaleoBios     Open Access   (Followers: 1)
Paleoceanography and Paleoclimatology     Full-text available via subscription   (Followers: 5)
Paleontological Journal     Full-text available via subscription   (Followers: 4)
Palynology     Hybrid Journal   (Followers: 1)
Papers in Palaeontology     Hybrid Journal  
Peer Community Journal     Open Access   (Followers: 4)
Quaternaire     Open Access   (Followers: 3)
Quaternary Research     Full-text available via subscription   (Followers: 19)
Quaternary Science Reviews     Hybrid Journal   (Followers: 26)
Review of Palaeobotany and Palynology     Hybrid Journal   (Followers: 1)
Revue de Micropaleontologie     Full-text available via subscription  
Rivista Italiana di Paleontologia e Stratigrafia (Research In Paleontology and Stratigraphy)     Open Access   (Followers: 1)
Spanish Journal of Palaeontology     Open Access  
Swiss Journal of Palaeontology     Hybrid Journal   (Followers: 4)
Vertebrate Anatomy Morphology Palaeontology     Open Access   (Followers: 1)
Zitteliana     Open Access  
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Paläontologische Zeitschrift
Journal Prestige (SJR): 0.658
Citation Impact (citeScore): 1
Number of Followers: 4  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1867-6812 - ISSN (Online) 0031-0220
Published by Springer-Verlag Homepage  [2469 journals]
  • Contribution of August Heinrich Ernst Beyrich to the knowledge of
           Ordovician trilobites in the Czech Republic

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      Abstract: Abstract The Barrandian area of the Teplá-Barrandian Unit is one of the richest trilobite-yielding areas in the world. In the middle of the nineteenth century, four main workers studied trilobites in this region, Joachim Barrande, Heinrich Ernst Beyrich, Ignatz Hawle, and August Carl Joseph Corda. Heinrich Ernst Beyrich, an excellent German palaeontologist studied and figured five species of Ordovician trilobites from the Barrandian area in two important contributions. One trilobite species, Cheirurus claviger (= Eccoptochile clavigera) was described in the year 1845; the other four trilobites, Odontopleura inermis (= Selenopeltis inermis), Calymene parvula (= Calymenella parvula), Calymene pulchra (= Prionocheilus mendax), and Trinucleus ornatus (= Deanaspis goldfussii goldfussii) were described in the year 1846. Well-preserved materials used in both Beyrich’s contributions were collected from Sandbian quartzose sandstone of the Letná Formation and from Sandbian to Katian greywacke of the Zahořany Formation. Original specimens of these Late Ordovician taxa are newly revised and actual systematic position of all species is discussed in detail. The history of Beyrich’s original specimens in the twentieth century is briefly summarized.
      PubDate: 2022-05-13
       
  • On the dimorphic occurrence of the upper Tithonian ammonite genus
           Djurjuriceras Roman from the Blue Nile Basin (Ethiopia)

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      Abstract: Abstract The dimorphic pair of the ammonite genus Djurjuriceras Roman, 1936 is documented from Ethiopia with its first ever microconch and the corresponding macroconch from the upper part of the Antalo Limestone Formation exposed at Dejen, Blue Nile Basin (Central Western Ethiopia). Djurjuriceras is associated with Oxylenticeras Spath, 1950. Based on ammonite, calpionellid and calcareous nannofossil evidences, the two taxa are assigned to an upper Tithonian (Microcanthum Zone) age. These finds, both regionally and globally, have fundamental bearing for biostratigraphic resolution and biozonal correlations.
      PubDate: 2022-05-13
       
  • Progress in the study of the Devonian–Carboniferous boundary sections in
           the Berchogur Depression (Mugodzhary Mountains, western Kazakhstan)

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      Abstract: Abstract The Devonian–Carboniferous boundary beds in the Berchogur (Birshogyr) sections in the Mugodzhary (Mugalzhary) Mountains in western Kazakhstan, known to contain various fossil groups, including ammonoids, conodonts, foraminifers, corals, crinoids, and trilobites, are re-examined. The siliciclastic-carbonate succession of the Zhangana Formation reveals the presence of several ammonoid, conodont, and foraminiferal zones. The succession contains the Acutimitoceras ammonoid Genozone, equivalent to the level of the Stockum ammonoid fauna of Germany, with the conodont Siphonodella sulcata appearing within the Genozone. The same beds show mass occurrences of the foraminifer Tournayellina pseudobeata. The study of the Berchogur sections began in the 1980s; these sections are among very few successions globally with ammonoids of the Acutimitoceras Genozone in association with conodonts and foraminifers. At that time, several outcrops in a small area in the upper reaches of Burtybai (Zhangansai) Creek and two boreholes drilled near the sections were studied, and new taxa of ammonoids, foraminifers, ostracods, conodonts, algae, and spores were described. New excavations in 2018–2020, in conjunction with a search for a new definition of the Devonian–Carboniferous boundary, provided abundant new information on these taxa, on the lithology, and on crinoids, trilobites, and corals. The exact position of marker fossils and lithological changes are documented in several sections along Burtybai Creek allowing an amended correlation with sections of the D–C boundary beds in Western Europe.
      PubDate: 2022-05-03
       
  • Moscovian–Kasimovian boundary conodont assemblages from the Kalinovo
           section, Donets Basin, Ukraine

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      Abstract: Abstract The conodonts of the Moscovian–Kasimovian boundary beds were restudied in the Kalinovo section—one of the most continuous successions in the Donets Basin, eastern Ukraine. Species of Idiognathodus and Swadelina are most common in the studied interval. Swadelina subexcelsa and Idiognathodus sagittalis, two of four species proposed as hypothetical index species for the Moscovian–Kasimovian boundary are registered in the Kalinovo section. I. turbatus and I. heckeli were not identified in the Donets Basin so far. Four conodont zones were distinguished in the studied Moscovian–Kasimovian boundary interval: the Swadelina gurkovaensis, Sw. subexcelsa, Sw. makhlinae and Idiognathodus sagittalis–I. neverovensis zones. Two potential biostratigraphic events were investigated for selection of the lower boundary of the Kasimovian Stage. One of them is defined by the FAD of Swadelina subexcelsa. It coincides with the base of the Krevyakinian Regional Substage, which is the traditional Moscovian–Kasimovian boundary in the type Kasimovian. But in the Donets Basin the Sw. subexcelsa and Sw. makhlinae zones belong to the upper part of the Lomovatkian Regional Stage, which is late Moscovian in age. This contradicts to the correlation by conodont data. The second event is defined by the FOD of Idiognathodus sagittalis and a number of new conodont species recovered close to the base of the Toretzian Regional Stage of the Donets Basin, and described herein shortly in open nomenclature. This event is more prominent in conodont evolution due to occurrence and then dominance of new species of Idiognathodus and extinction of the Swadelina species characteristic of a whole Upper Moscovian Substage. This event corresponds to the Khamovnikian Regional Substage of the Kasimovian type area, one substage higher than the traditional Moscovian–Kasimovian boundary. This event with outburst of new species documents the new step in conodont evolution. If the position of the Moscovian–Kasimovian boundary will be selected by the FAD of one of the three species—I. sagittalis, I. turbatus or I. heckeli, the boundary will be placed in the lower or middle part of the Khamovnikian Regional Substage of the type Kasimovian and at the base of the Toretzian Regiostage in the Donets Basin. At present according to the Ukrainian Carboniferous Stratigraphical Scheme the Moscovian–Kasimovian boundary in the Donets Basin takes place already at the base of the Toretzian Regiostage. Its position is based on the cyclo-stratigraphic analysis. It does not correspond to that in the Kasimovian stratotype. The correlation of the Donets Basin with the Moscow Syneclise, Ural Mountains, North Spain and partly with South China (Tethyan Province) is mostly reliable but correlation to the U.S. Midcontinent is complicated due to presence of mostly endemic species in both Eurasia and North America. The Moscovian–Kasimovian boundary interval is characterized by a sea-level lowstand that isolated marine basins.
      PubDate: 2022-04-28
       
  • Declining morphological diversity in snakefly larvae during last 100
           million years

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      Abstract: Abstract Raphidioptera, the group of snakeflies, is a rather species-poor in-group of Holometabola. Yet, fossils of snakeflies indicate that the group was more diverse in the past. Here we compare the morphological diversity of snakefly larvae over time. Snakefly larvae are well represented in Cretaceous and Eocene ambers facilitating such a comparison. We used measurements of discrete dimensions as a basis for comparison. This reveals a larger diversity of snakefly larvae in the Cretaceous, especially in relation to head shapes and morphology of the antennae, which were much more variable. In particular, some Cretaceous larvae possessed greatly elongated head capsules and uniquely long and prominent antennae, unparalleled among modern forms. Already by the Eocene, snakefly larvae were less variable than those of the Cretaceous, although some still possessed longer antennae than modern-day larvae. The loss of morphological diversity supports the already well-established loss of taxonomic diversity in the group across time. Quite likely, this also indicates a loss of ecological diversity. These results are comparable to losses in different lineages of the closely related group Neuroptera.
      PubDate: 2022-04-18
       
  • Oldest East Gondwanan pycnodont fishes (Neopterygii, Pycnodontiformes)
           from the Middle Jurassic (Bathonian) of Jaisalmer, western India

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      Abstract: Abstract Globally, the Middle Jurassic records of pycnodonts are extremely scarce. Here we report the discovery of pycnodont remains (prearticular dental plate, isolated teeth) from the Middle Jurassic (Bathonian, ~ 162 Ma) Fort Member of Jaisalmer Formation, Rajasthan state, western India. The specimens from Jaisalmer, assigned to cf. Eomesodon sp., represent the earliest record of East Gondwanan pycnodonts, and suggest a relatively rapid dispersal and a much wider Middle Jurassic distribution after their first appearance in the Late Triassic of the Western Tethys. The new Indian find predates the next younger (Late Cretaceous) record of pycnodont fishes in India by about a hundred million years, and necessitates a re-evaluation of the current ideas favoring a restricted occurrence of these remarkable fishes during the Late Triassic–Middle Jurassic.
      PubDate: 2022-04-16
       
  • Historically transposed flipper pairs in a mounted plesiosaurian skeleton

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      Abstract: Abstract Plesiosaurians evolved four wing-like flippers that are morphologically similar to each other and were most likely used in underwater flight. Plesiosaurians have been the subject of a long research history as well as a long history of misidentifications and misinterpretations, especially transposition of parts of or entire fore- and hind flippers. We identified the transposed fore- and hind flippers in a mounted Cryptoclidus eurymerus specimen (GPIT-PV-30092) on display in the Paleontological Collection of Tübingen University. It is likely that the fore- and hind flippers were accidentally transposed when the skeleton was mounted, although, amongst plesiosaurians, the fore- and hind flippers of Cryptoclidus eurymerus are some of the least similar-looking ones. This occurred either during a remounting of the skeleton from a free-standing armature on the ground to a freely “flying” skeleton hanging from the ceiling, or after a research project conducted on the specimen in the 1970s. We summarize osteological characteristics that can be used to correctly identify fore- and hind flippers of this species, and for better future assessment of the plesiosaurian locomotory system.
      PubDate: 2022-04-15
       
  • A monospecific assemblage of cockroaches (Dictyoptera: Subioblattidae)
           from the Triassic of Kyrgyzstan

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      Abstract: Abstract Seven known species of the Triassic family Subioblattidae Schneider, 1983 reveal a cosmopolitan paleogeographic range (Argentina, South Africa, China, France, Kazahstan and Kyrgyzstan). A monospecific assemblage of Subioblatta madygenica Papier and Nel, 2001 from the Middle–Late Triassic Madygen locality in Kyrgyzstan is described here. All specimens exhibit characters typical for Subioblattidae such as an elongated costal field, ribbon-like subcostal field, Sc with pectinate branches inclined apically, sigmoidal R with undulating branches, variable M, sigmoidal CuA with branches subperpendicular to wing margin and a long anal field with a unique diagonal groove. Highly preserved coloration on wings of several specimens is comparable to that of S. madygenica. The described material enhances our knowledge of Triassic cockroaches and affirms Madygen as one of the most important Mesozoic insect lagerstätte.
      PubDate: 2022-04-05
       
  • New species of small foraminifers from the Mechetlino Quarry section
           (Southern Urals, Russia): a potential candidate for the GSSP of the lower
           boundary of the Global Kungurian Stage

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      Abstract: Abstract Four new species of small foraminifers, Hemigordius infantem sp. nov., Pseudoammodiscus valeryi sp. nov., Nodosaria septumlamellosa sp. nov., and N. zebra sp. nov., are described from strata near the Artinskian/Kungurian boundary in sections of the Southern Urals (Mechetlino Quarry), Middle Urals (Kamayskiy Log), Preuralian Foredeep, and the Sol-Iletsk Swell (boreholes of the Nagumanovskaya Field), Russia. High morphological variability of Hemigordius infantem sp. nov. is noted. It is shown that lateral thickenings and wall structure may not be preserved as a result of subsequent lithification processes. The lumen shape of the last whorl and test morphology are more constant features for all specimens of Hemigordius infantem sp. nov. The high variability of dimensions of H. infantem sp. nov. and Pseudoammodiscus valeryi sp. nov. is clearly seen in the binary discriminative diagrams of the dependence of some features of the tests depending on the number of whorls (test size and proloculus diameter). For the first time, the appearance of species of Nodosaria with a multilayered, poly- or plesiomonolamellar wall have been noted in the upper Artinskian deposits in the Urals. Such a wall is known only in Artinskian and Kungurian deposits in the Urals, and in Artinskian, Kungurian, and Kazanian deposits of the north and northeast of Russia. The appearance of this feature may be a good marker of the upper Artinskian (upper part of the Sarginian), Neostreptognathodus pequopensis Conodont Zone, near Artinskian/Kungurian boundary.
      PubDate: 2022-03-26
       
  • Eocene tube-dwelling annelids (Polychaeta: Sedentaria) from the Black
           Hills, western Washington State: the first record of Neodexiospira from
           North America

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      Abstract: Abstract Fossils of two new species of small, dextrally coiled polychaetes, Neodexiospira ferlinghettii and Neodexiospira vanslykei from Eocene strata in the Black Hills southwest of Olympia, Washington State, USA represent the first records of Neodexiospira from North America and the eastern North Pacific Basin. Neodexiospira ferlinghettii occurs in early Eocene sediments within the Crescent Formation near Larch Mountain, and N. vanslykei is found in late Eocene basal sandstone of the Lincoln Creek Formation exposed along Porter Creek. The tubewall of N. vanslykei has two layers: the microstructure of the outer, wider layer consists of tall prismatic crystals radially oriented, and an inner layer consists of larger less defined prismatic crystals oriented perpendicular to the outer layer. In addition, the tracefossil Conchocelichnus was discovered within the tubewalls of some specimens of N. vanslykei, the first record of this ichnogenus from North America.
      PubDate: 2022-03-23
       
  • Placodus (Placodontia, Sauropterygia) dentaries from Winterswijk, The
           Netherlands (middle Anisian) and Hünfeld, Hesse, Germany (late Anisian)
           with comments on ontogenetic changes

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      Abstract: Abstract Two recently found dentaries from the Lower Muschelkalk of Winterswijk (The Netherlands) and from the Upper Muschelkalk of an outcrop in the vicinity of Hünfeld (Hesse, Germany) are studied and compared to lower jaws of placodonts. As a result, the here described specimens can be assigned to Placodus cf. gigas. However, this assignment should be regarded as preliminary due to the isolated nature of the material. More diagnostic material is necessary to validate this affiliation. A certain morphological variability in P. gigas dentaries that had been pointed out before is also obvious among the new material. Placodus gigas has a wide paleogeography and stratigraphic range and a revision of the material assigned to P. gigas with new methods is overdue but beyond the scope of the current paper. The dentary from Hünfeld is with about 4 cm preserved length the smallest so far known dentary of a Placodus. It provides interesting insights in morphological changes during ontogeny and reveals differences in trajectories when compared to dentaries of different ontogenetic stages of Cyamodus hildegardis.
      PubDate: 2022-03-22
       
  • Listriodon dukkar sp. nov. (Suidae, Artiodactyla, Mammalia) from the late
           Miocene of Pasuda (Gujarat, India): the decline and extinction of the
           Listriodontinae

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      Abstract: Abstract The Listriodontinae were a common and widespread group of Suidae (pigs) that lived in an area extending from Portugal to China and to southern Africa. Here, we describe the new species Listriodon dukkar from Pasuda (Gujarat, India). It shares features with Li. pentapotamiae, evolved from it, and is the last representative of this lineage. The Listriodontinae flourished for about 10 million years, reached their maximum diversity and geographic extension during the Mid-Miocene Climatic Optimum (about 17–13.6 Ma), and their last records are close in age and date to ~ 9.8 Ma in the Indian Subcontinent, 9.78 Ma in Europe, and ~ 10 Ma in Africa. We review the environments in which the last listriodont lineages lived and went extinct. Their extinctions occurred against a background of increasing seasonality, vegetation change, a rise in bovid diversity and abundance, and local events, such as the European Vallesian Crisis and a dramatic drop in tragulid abundance in the Siwaliks. However, changes in the atmospheric pCO2 may have contributed to their decline and extinction in all their geographic distribution. Decreasing pCO2 is expected to have decreased sugar content and increased protein content of leaves and fruit. Hindgut fermenting Suoidea have higher protein requirements, while foregut fermenting Suoidea are more efficient in digesting sugars. Listriodontinae were probably foregut fermenters and were less well adapted in a low pCO2 world.
      PubDate: 2022-03-17
       
  • First fossil tumbling flower beetle-type larva from 99 million-year-old
           amber

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      Abstract: Abstract Beetle larvae often differ significantly in morphology from their adult counterparts. Therefore, it should be surprising that these immatures are often not considered to the same extent as the adult beetles. As an example, the fossil record of most beetle groups is largely represented by adult specimens. Representatives of Mordellidae, the group of tumbling flower beetles, have a cosmopolitan distribution with myriads of formally described species, based mostly on adult male specimens. Mordellidae is also well represented in the fossil record, but again only by adults; not a single fossil specimen of a larva has been reported until now. We report a new well-preserved beetle larva in 99 million-year-old Kachin amber. The larva possesses specialisations not known from the modern larvae of Mordellidae, but otherwise is clearly similar to them in many aspects. It appears possible that the fossil represents yet another holometabolan larva in Kachin amber that is associated with life within wood and/or fungi, and therefore, may have contributed to carbon cycling of the past.
      PubDate: 2022-03-03
      DOI: 10.1007/s12542-022-00608-8
       
  • The first fossil from the superdiverse clade Loricariinae (Siluriformes,
           Loricariidae): a new species of the Armored Catfish from the late Miocene
           of Paraná, Argentina

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      Abstract: Abstract Armored catfishes of the subfamily Loricariinae include more than 250 species and 31 genera distributed along South America from Costa Rica to Buenos Aires province in central Argentina. In spite of that, the entire clade lacks a single paleontological record. In this work, a new species of Loricariinae belonging to the genus Sturisomatichthys from late Miocene Ituzaingó beds at Paraná locality, Entre Ríos province, Argentina, is described. The holotype and only known specimen consists on a partially preserved body, with features that allow the recognition of a new species. The new taxon fits previous hypotheses, indicating that the Miocene fish faunas from paleo-Paraná basin were close to those of northern South America.
      PubDate: 2022-03-03
      DOI: 10.1007/s12542-022-00613-x
       
  • Diversity of gobioid fishes in the late middle Miocene of northern
           Moldova, Eastern Paratethys – part I: an extinct clade of Lesueurigobius
           look-alikes

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      Abstract: Abstract Studies of otoliths suggest that Gobioidei, which are among the most species-rich groups of modern-day vertebrates, were prominent elements of late middle Miocene (early Sarmatian sensu lato) fish faunas in Europe and Western Asia. However, few complete skeletons have come to light. Here, we report an assemblage of six marine gobiid species, based on skeletons preserved with otoliths in situ, from the lower Volhynian (lower Sarmatian s.l.) of Karpov Yar, Naslavcea, northern Moldova (Eastern Paratethys). Previously only one of these species had been reported from the Central Paratethys, based on its otoliths alone. Five new species representing four new genera are described: †Katyagobius prikryli gen. et sp. nov., Pseudolesueurigobius manfredi gen. et sp. nov., †Sarmatigobius compactus gen. et sp. nov., †Yarigobius decoratus gen. et sp. nov., and †Y. naslavcensis gen. et sp. nov. All six species share the following set of characters, suggesting that they represent a monophyletic clade: 27–29 vertebrae (of which 10 are abdominal); spines of first dorsal fin distally filamentous; second dorsal fin with spine and 14–16 soft rays; anal fin with spine and 13–15 soft rays; caudal fin longish-to-lanceolate; otoliths (sagittae) with rounded, trapezoid-to-squarish shape. Their skeletal features suggest that they are closely related to Lesueurigobius Whitley, 1950, but the otoliths preserved in situ do not support such a classification. The new fossils most likely represent a stem lineage of the European Aphia lineage, and indicate that the diversity of gobiid lineages 12 million years ago differed clearly from that observed today.
      PubDate: 2022-03-01
       
  • Additions to the early Miocene herpetofauna of Weisenau (Germany):
           

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      Abstract: Abstract A small sample of fossil vertebrae of amphibians and reptiles found in the historical collection of the Museum of Geology and Palaeontology of the University of Torino is here described. The fossils most likely originate from the same deposits as the old collections from Weisenau, in the Mainz Basin. In spite of the small number of remains, at least five taxa are recognized: one urodele (Salamandra sansaniensis), one lizard (Pseudopus sp.), and three snakes (Falseryx petersbuchi, Zamenis kohfidischi, and Vipera antiqua). Records of only one of these, the viper, were already properly published in previous accounts on the site, whereas the urodele and lizard were only mentioned in literature, which we are now able to confirm. The other two snakes are identified in the early Miocene of Weisenau for the first time. For at least four of the identified taxa, the Weisenau occurrence is the oldest known. This small sample supports the hypothesis that the early Miocene of Europe was an important step towards establishing its modern herpetofauna, soon after the Oligocene/Miocene transition.
      PubDate: 2022-03-01
       
  • Split-footed lacewings declined over time: indications from the
           morphological diversity of their antlion-like larvae

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      Abstract: Abstract Nymphidae, the group of split-footed lacewings, is a rather species-poor group. Split-footed lacewings nowadays are restricted to Australasia, while fossil forms are also known from other areas of the world, indicating that the group was more species-rich and therefore likely diverse in the past. Split-footed lacewings have rather distinct larvae, roughly resembling antlion larvae, but differing from the latter especially with regard to the mandibles. Antlion larvae usually have three prominent teeth on each mandible, while at least extant larvae of split-footed lacewings only have a single prominent tooth per mandible. Fossils interpreted as larvae of split-footed lacewings are well known from amber from Myanmar (ca. 100 myr; Burmese amber) and by a single specimen from Baltic amber (about 40 myr). We here report additional fossil specimens from Myanmar amber, expanding the known record of fossil forms from six depicted specimens to 15. For the extant fauna, we could compile 25 larvae. We compare the diversity of shape of extant and fossil larvae through time using an outline analysis (based on elliptic Fourier transformation) of the head. The results of this analysis indicate that the morphological diversity, or disparity, of split-footed lacewing larvae was higher in the past than it is today. With this type of analysis, we can show a loss of diversity over time, without the necessity to identify the fossil larvae down to a narrow taxonomical range. A similar pattern has already been recognised in silky lacewings, Psychopsidae. This might indicate a general loss of diversity of lacewing larvae.
      PubDate: 2022-03-01
       
  • Middle Triassic bivalve traces from central Europe (Muschelkalk, Anisian):
           overlooked burrows of a common ichnofabric

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      Abstract: Abstract The ichnotaxonomy, producers and ethology of the bivalve trace fossil Oravaichnium Plička and Uhrová, 1990 are revised, and the mode of formation is discussed. The ichnogenus is compared with other mollusc trace fossils such as Protovirgularia, Lockeia and Ptychoplasma, as well as the common, cosmopolitan trace fossils Planolites and Palaeophycus, which are morphologically similar to Oravaichnium. A lectotype of Oravaichnium hrabei Plička and Uhrová, 1990 is defined and illustrated. Oravaichnium carinatum isp. nov. from the Middle Triassic of Poland and Germany is described and interpreted as a bivalve burrow. It differs from the relatively rare O. hrabei by a carinate rather than subquadrate cross section. However, O. carinatum isp. nov. shows a great variation of morphology and transitional forms with O. hrabei are common. Similarly, transitional forms of Oravaichnium with other bivalve ichnogenera, especially Protovirgularia, also occur. The studied Triassic ichnoassemblage clearly indicates that bivalve burrows are much more common than previously believed and are represented by repichnia, fodinichnia and cubichnia. The occurrence of similar ichnofabrics containing Oravaichnium in other Triassic succession of the Germanic and Tethys basins and elsewhere suggests a much wider distribution than hitherto known. It is evident that bivalves, most likely nuculids, participated greatly in bioturbation, and the Middle Triassic infaunalisation is one of the most important steps in Phanerozoic evolution of ichnocoenoses.
      PubDate: 2022-03-01
       
  • Rediscovering Lutra lutra from Grotta Romanelli (southern Italy) in the
           framework of the puzzling evolutionary history of Eurasian otter

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      Abstract: Abstract A river otter hemimandible has been rediscovered during the revision of the historical collections of G.A. Blanc from Grotta Romanelli, complementing the ongoing multidisciplinary research fieldwork on the site. The specimen, recovered from the level G (“terre rosse”; early Late Pleistocene or late Middle Pleistocene), is here assigned to Lutra lutra. Indeed, morphological and morphometric comparisons with other Quaternary Lutrinae fossils from Europe allow to exclude an attribution to the relatively widespread and older Lutra simplicidens, characterized by distinctive carnassial proportions. Differences with Cyrnaonyx antiqua, which possessed a more robust, shellfish-feeding dentition, support the view of a successful niche repartition between the two species during the late Middle to Late Pleistocene of Europe. The occurrence of Lutra lutra from the “terre rosse” of Grotta Romanelli suggests deep modifications of the landscapes due to the ecological adaptation of the taxon, and indicates that the Eurasian otter spread into Europe at the Middle–Late Pleistocene transition.
      PubDate: 2022-03-01
       
  • Oxfordian brachiopods from the ammonitico rosso-type Fonyászó Limestone
           formation at Zengővárkony, Mecsek Mountains, Hungary and their
           palaeoecological, palaeobiogeographical and palaeopathological
           significance

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      Abstract: Abstract Recent discovery of a previously unknown outcrop in the vicinity of the Zengővárkony lime-kilns (Mecsek Mountains, Hungary) provided a few identifiable upper Oxfordian brachiopods that exhibit a truly Mediterranean (Tethyan) character. Dating of the outcrop is based on a rich ammonite fauna: Benetticeras benettii; Trimarginites ex gr. trimarginatus; Orthosphinctes (Orthosphinctes) ex gr. tiziani clearly indicate the Late Oxfordian. The brachiopod fauna indicates a deep-water marine environment and well-oxygenated sea floor. Nucleata bouei and Pygope catulloi are recorded for the first time from the Mecsek Mountains. A pathologic specimen of Pygope catulloi is also recognized. Its ventral valve was injured in an early developmental stage that caused deformation of the left side, which was overgrown by the healthy right side and created an asymmetric adult shell shape. Cause of the injury is unclear but it provides further evidence for subsequent healing of brachiopods after being injured. This is the first description and illustration of Oxfordian brachiopods from the Mecsek Mountains, Hungary. The occurrence of Tethyan originating pygopid brachiopods in the Oxfordian strengthens earlier observations that from the Bathonian/Callovian Tethyan influence became overwhelming in the Mecsek Mountains fauna. Pygope catulloi strengthens records from Algeria that pygopid brachiopods may have occurred very early on the periphery of the Western Tethys.
      PubDate: 2022-03-01
       
 
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