1,740 research outputs found
First record of a coelacanth fish from the Middle Triassic Meride Limestone of Monte San Giorgio (Canton Ticino, Switzerland)
No full textAbstract. A new specimen of coelacanth based on a new specimen from the Meride Limestone Formation
of the UNESCO World Heritage area of Monte San Giorgio is described. It represents the first occurrence of an
actinistian in this formation. The newly discovered specimen shares many characters with the poorly known Heptanema
paradoxum Bellotti 1857, from the Ladinian Perledo Formation of Northern Italy. A comparison with the holotype and
only existing specimen of H. paradoxum supports the assignment of the new specimen to the genus Heptanema. Some
anatomical differences between the two specimens are most probably due to different ontogenetic stages, while few
may support the erection of a new species; since the specimen is a juvenile it is preferred not to erect a new species,
but to classify the specimen as Heptanema cf. H. paradoxum
New available data from both the holotype of H. paradoxum and form the new specimen allows an attempt to assess
the phylogenetic relationships of Heptanema
Prey content in a Saurichthys reveals the presence of advanced halecomorph fishes in the Middle Triassic of Monte San Giorgio
No full textFine preparation of a specimen of Saurichthys curionii from the Cassina beds (early Ladinian) of Monte San Giorgio exposed stomach content of difficult interpretation. UV investigation revealed it consists of several preys: a smaller specimen of Saurichthys, and at least four other fishes, with scale covering reduced to a small area of the body or even completely scaleless and with a vertebral column made up by thin, ring-like centra that surrounded a persistent notochord. These prey items testify the presence of new species of advanced Halecomorphi in the Monte San Giorgio fossil ichthyofaun
A new Coelacanth specimen with elongate ribs from the Middle Triassic (Ladinian) Kalkschieferzone of the Monte San Giorgio (Canton Ticino, Switzerland)
No full textNew finding of a coelacanth from the upper Ladinian upper Kalkschieferzone of the Meride Limestone
Formation of Monte San Giorgio (UNESCO World Heritage area) is described. It represents the first known
coelacanth from the Middle triassic that undoubtedly bears elongate thin ribs. the incompleteness of the specimen
prevents a reliable taxonomic assignment or the erection of a new species, however some characters, mainly scale
morphology, are very similar to those of the holotype of Heptanema paradoxum bellotti, 1857 from the roughly coeval
Perledo Formation of northern italy. elongate ribs are not reported in original descriptions of H. paradoxum, however
small portion of ribs are visible among the scales of the holotype. accordingly, the new specimen is tentatively
ascribed to Heptanema as Heptanema cf H. paradoxum
A new species of Saurichthys (Actinopterygii: Saurichtydae) from the middle Triassic of Monte San Giorgio
No full textA new species of the actinopterygian fish genus Saurichthys is described on the basis of several specimens from the Sceltrich beds (Meride limestone Formation) of the uneSco World Heritage area of Monte San Giorgio. The new species shows among other characters, unsegmented lepidotrichia in all fins and elongated and wide paired fins, suggesting a different adaptation for swimming and catching preys with respect to other Saurichthys species of Monte San giorgio. Phylogenetic analysis suggests that the new species is closely related to the Saurorhynchus species group. The new finding adds further knowledge to the plasticity and functional adaptations of the genus Saurichthys, which was one of the most successful actinopterygians of the triassic
The contribution of the Middle Triassic fossil assemblage of Monte San Giorgio to insect evolution
No full textThe Triassic represents a critical period for understanding the turnover of insect fauna from the Paleozoic to the Mesozoic following the end-Permian mass extinctions (EPME); however, fossil deposits from the Early-Middle Triassic are scarce. The exceptionally preserved 239 million-year-old fossil insect fauna recorded at Monte San Giorgio (Switzerland), including 248 fossils representing 15 major insect clades is presented here. Besides the exceptional features, including their small size and excellent preservation, the fossils have importance in the evolutionary history of the group. The taxonomic and ecological diversity recovered, including both freshwater (dragonflies and caddisflies) and terrestrial taxa (true bugs and wasps), demonstrates that complex environments sustained a paleocommunity dominated by monurans (thought not to have survived the EPME), midges, and beetles. Interestingly, a blattodean-like fossil bearing an external ootheca was also found, important for understanding Paleozoic roachoids to extant cockroaches’ transition and the evolution of maternal brood care. Moreover, the youngest and first complete specimen of †Permithonidae and the oldest sawfly fossils were discovered. Finally, round-shaped bodies, compatible with seminal capsules or lycophyte spores, were found on the abdomens of several midge-like individuals. If these are spores, non-seed-bearing plants could have been the first entomophilous plants rather than gymnosperms, as recently supposed. Altogether, these fossils contribute substantially to understanding insect evolution and Paleozoic-Mesozoic faunal turnover
Co-occurrence of Neusticosaurus edwardsii and N. peyeri (Reptilia) in the Lower Meride Limestone (Middle Triassic, Monte San Giorgio)
No full textBlätter zur Belehrung und Erbauung für Jünglinge edler Erziehung
No full textvon Rudolf HanhartDas Buch ist dem "eidgenössischen Obersten, Amtmann des hohen Standes Zürich in Winterthur" und "Mitvorsteher der landwirtschaftlichen Lehranstalt im Bläsihof" Caspar Hess gewidmet. - Vorwort: Laut Vorwort waren "mehrere Bogen" dieses Buches "schon im Jahr 1816 gedruckt", wurden aber erst hier herausgegeben. Über die hier veröffentlichten "Schulreden, die bey der jährlichen Promotionsfeier von einem Schüler vorgetragen werden", schreibt der Autor: "Nach dem Wunsche achtbarer Männer, deren Urtheil mir höchst wichtig ist, sollte ich dieselben dem Schicksal entreissen, das die vereinzelten Schriftchen gewöhnlich trifft." Die "Erinnerungen an die Heldenjünglinge Körner und Mauderode" sind aufgrund der "bekannten Lebensbeschreibungen" von Christian Gottfried Körner und Dr. Sack verfasst. Der Beitrag "Gedächtnisrede auf den seligen Stockar von Neuforn" stammt von Johann Georg Müller. Hanhart versteht seine Aufsätze als "Beyträge zur Charakterbildung edler Jünglinge". - Inhalt: Insgesamt 21 Beiträge, darunter folgende Gattungen: sieben Schulreden, die teils das Leben vorbildlicher Männer skizzieren, teils allgemeine Ermahnungen aussprechen, etwa "Ueber die Versuchungen, welchen die studierende Jugend unserer Zeit in wissenschaftlicher Rücksicht ausgesetzt ist"; drei Konfirmationsreden, z.B. "Warnung vor dem Weltsinn"; drei Reden über Bildung und Berufswahl; drei Übersetzungen aus "Essays Moral and Literary" von Vicesimus Knox; zwei Nachrufe auf ehemalige Gymnasiallehrer; eine Sammlung von 100 Sprichwörtern; zwei Biographien über die in den Befreiungskriegen gegen Napoleon gefallenen "Heldenjünglinge" Theodor Körner und Franz von Mauderode. Fast in allen Texten wird die Notwendigkeit klassischer und wissenschaftlicher Bildung betont, die für die verschiedensten Berufe unerlässlich sei und eine christliche Frömmigkeit keineswegs ausschliesse
Rudolf Otto filosofo della religione
No full textLo straordinario successo del Sacro (1917), che ha reso celebre Rudolf Otto, ha provocato, per contraccolpo, la diffusione di una figura stilizzata dell’autore, impoverita dall’oblio toccato al resto della sua produzione e da letture parziali e semplificative. Una ricostruzione genetica del modo in cui Otto impone la nozione di «heilig» nel lessico tedesco specializzato, muovendo da Lutero e opponendo al neokantismo una lettura friesiana del trascendentale, fa emergere la qualità filosofica di una teoria del religioso che rivela convergenze insospettate con la fenomenologia husserliana. The extraordinary success of The Holy (1917) made Rudolf Otto famous, but it also contributed to propagate a simplified figure of the author. The rest of his work was condemned to oblivion, which caused misleading interpretations of The Holy itself. A genetic reconstruction of the way in which Otto established the term «heilig» in the technical German proves to be fruitful. When considering his interpretation of Luther and his Fries-based opposition to a neoKantian approach to the concept of «transcendental», the philosophical relevance of Otto’s theory of religion can be fully recognized, as well as unsuspected links to Husserlian phenomenology
Evolution of western Tethyan involute Heterostegina from late Bartonian to the end-Priabonian
No full textEocene involute Heterostegina having originated from the Operculina bericensis-roselli-gomezi group are widespread in the upper Bartonian and Priabonian beds of the Western Tethys. They have been morphometrically investigated and the important features of the equatorial section of their A-forms were statistically evaluated from thirty-four localities (including five topotypical ones). These localities represent the whole late Bartonian to latest Priabonian interval, mark different ecological conditions and extend from Spain to Armenia. Populations are ranked into three species, H. armenica, H. reticulata and H. gracilis based on the presence/absence of granulation, on the arrangement, shape and density of secondary chamberlets and on the relative size of the proloculus. These species form evolutionary lineages within which (especially within H. reticulata) a very rapid evolution could be observed with the reduction of the number of operculinid chambers, the increase of the number of secondary chamberlets (counted at chamber 14) and in the increase of the size of the proloculus, although the last turned out also to be ecologically controlled. This evolution is proven by the stratigraphical succession of populations in the Mossano section (Italy) and also by superpositions from other localities. The evolutionary changes are also accompanied by the change of co-occurring fossils starting with the disappearance of large-sized Nummulites, then followed by the appearance of genus Spiroclypeus and then by the disappearance of survivor middle Eocene orthophragmines. Based on the reduction of operculinid chambers as the most reliable parameter, two chronosubspecies of Heterostegina armenica (one of them is newly erected) and seven ones of H. reticulata (with three new subspecies) are defined biometrically. This allows us to subdivide the shallow benthic zone (SBZ) 18 very cautiously into three while SBZ 19 into two subzones. Heterostegina gracilis (the only species with granulation) characterizes the SBZ 20 zone. The middle/upper Eocene (=Bartonian/Priabonian) boundary is suggested to be placed onto the base of the “Priabona marls” in the Mossano section corresponding to the SBZ 18/19 limit, to the first appearance of genus Spiroclypeus, to that of Nummulites fabianii and Heterostegina reticulata mossanensis. It falls into the upper part of both the P 15 planktic foraminiferal and NP 18 calcareous nannoplankton zones. The extremely rapid evolution of H. reticulata accompanied with relatively large geographic distribution and wide ecological niche allows calibrating larger foraminiferal events around the proposed Bartonian/Priabonian boundary. As a working hypothesis, the extinction of large-sized Nummulites seems to be heterochronous in the late Bartonian in having migrated eastward. Relying on data from Italy, Hungary and Turkey, the first appearance of Spiroclypeus (with the same evolutionary degree) is proven to be synchronous in the very base of the Priabonian. Mediterranean Eocene involute Heterostegina became extinct very probably with no descendants at the very end of the Eocene. This research was realized in the frame of I.G.C.P. project 393 having financed also some of Less’s travels. The final phase of the work was sponsored for Less by the National Scientific Fund of Hungary (OTKA, Grants no T 037619, 042799 and 060645), for Özcan by TÜBITAK (project no YDABAG–101Y060), for Papazzoni by MIUR Cofin 2002–2005 (resp. prof. A. Russo, Modena) and for Stockar by the Cantonal Museum of Natural History (Lugano)
Rudolf Mayer
No full textThe bachelor thesis deals with the life and work of Rudolf Mayer. In the first part, attention is given to the author and the reception of his work presented in period magazines and newspapers from the poet´s death in 1945. During the second part of his work is examined in terms of literary discursivity the subjective romanticism
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