scholarly journals Biostratigraphy and biogeography of Frasnian, Upper Devonian conodonts

1992 ◽  
Vol 6 ◽  
pp. 166-166
Author(s):  
Gilbert Klapper
Keyword(s):  
New York ◽  
Western Australia ◽  
Endemic Species ◽  
Middle Devonian ◽  
The United States ◽  
Paired Comparisons ◽  
Benthic Organisms ◽  
Canning Basin ◽  
Confidence Levels ◽  
Montagne Noire

Analysis of Frasnian conodont sequences in the Montagne Noire, southern France, results in the recognition of a conventional zonation consisting of thirteen zones. Graphic correlation of eight Montagne Noire sections with a total of 11 sections in the Alberta Rockies, the Hay River-Trout River areas of the southern Northwest Territories, Canada, the Midcontinent and New York sequences in the United States, and the Canning Basin, Western Australia divides the Frasnian into 34 composite standard units. Most of these sections are dominated by conodonts of the outer-shelf to basinal Palmatolepis biofacies, but those of Hay River-Trout River are occupied by the quite contrasting inner-shelf Polygnathus biofacies. Correlation of the latter with the Montagne Noire zonation is effected only through graphic correlation. The taxonomy of many of the critical species involved in the correlations is based on shape analysis and multielement taxonomy of Palmatolepis.Prevailing opinion is that the Frasnian was a time of cosmopolitanism as exemplified both by benthic organisms, especially corals and brachiopods, as well as conodonts. This contrasts with the Early and Middle Devonian which was a time of significant endemism in benthic fossils and in conodonts. The high point in conodont endemism according to the zone-by-zone analysis of the Early and Middle Devonian (Klapper and Johnson, 1980) was the early Eifelian when there were about 70% endemic species. Although endemism did not reach this high in the Frasnian, analysis of a limited number of intensively collected and studied sections in the Montagne Noire, U.S. and Canada, Western Australia, and the Russian Platform demonstrates levels of endemism ranging from about 30 to 45% in three composites of two zones each. Endemic species occur in both the Palmatolepis and Polygnathus biofacies. Using the Probabilistic Index of Similarity of Raup and Crick (1979), the null hypothesis of randomness is rejected for some paired comparisons between localities representing different biofacies, as would be expected, but it is also rejected between some localities representing the same biofacies on different continents. Although the explanation of significantly dissimilar faunas can be accepted at 95% confidence levels in only a limited number of instances, there are dissimilarities of somewhat lesser magnitude among various paired comparisons. This seems to indicate that the Frasnian was not a time of conodont cosmopolitanism even within the Palmatolepis biofacies.

Biodiversity, distribution and patterns of extinction of the last odontopleuroid trilobites during the Devonian (Givetian, Frasnian)

2007 ◽  
Vol 144 (5) ◽  
pp. 777-796 ◽  
Author(s):  
RAIMUND FEIST ◽  
KENNETH J. McNAMARA
Keyword(s):  
Functional Analysis ◽  
New Species ◽  
New Taxa ◽  
Western Australia ◽  
Middle Devonian ◽  
Two New Species ◽  
New Material ◽  
Montagne Noire ◽  
Shell Bed

Biostratigraphical ranges and palaeogeographical distribution of mid-Givetian to end-Frasnian odontopleurids are investigated. The discovery of Leonaspis rhenohercynica sp. nov. in mid-Givetian strata extends this genus unexpectedly up to the late Middle Devonian. New material of Radiaspis radiata (Goldfuss, 1843) and the first koneprusiine in Britain, Koneprusia? sp., are described from the famous Lummaton shell-bed, Torquay, Devon. New taxa of Koneprusia, K. serrensis, K. aboussalamae, K. brevispina, and K. sp. A and K. sp. B are defined. Ceratocephala (Leonaspis) harborti Richter & Richter, 1926, is revised and reassigned to Gondwanaspis Feist, 2002. Two new species of Gondwanaspis, G. dracula and G. spinosa, plus three others left in open nomenclature, are described from the late Frasnian of Western Australia. A further species of Gondwanaspis, G. prisca, is described from the early Frasnian of Montagne Noire. Species of Gondwanaspis are shown to possess a number of paedomorphic features. A functional analysis suggests that, unlike other odontopleurids, Gondwanaspis actively fed and rested with the same cephalic orientation. The sole odontopleurid survivors of the severe terminal mid-Givetian biocrisis (‘Taghanic Event’) belong to the koneprusiine Koneprusia in the late Givetian and Frasnian, and, of cryptogenic origin, the acidaspidine Gondwanaspis in the Frasnian. Whereas the former became extinct in the late Frasnian at the Lower Kellwasser Event, the latter disappeared, and with it the entire Odontopleuroidea, at the terminal Frasnian Upper Kellwasser global biocrisis.

scholarly journals Prospects for an upper Givetian substage

Fossil Record ◽  
2001 ◽  
Vol 4 (1) ◽  
pp. 83-99 ◽  
Author(s):  
Z. S. Aboussalam ◽  
R. T. Becker
Keyword(s):  
New York ◽  
Middle Devonian ◽  
Complex Sequence ◽  
Direct Association ◽  
Montagne Noire ◽  
Sedimentary Cycle

New ammonoid and conodont data from Germany, the Montagne Noire (France) and southeastern Morocco document a complex sequence of sedimentary events and faunal changes within an extended Givetian (late Middle Devonian) Taghanic Event Interval or Taghanic Biocrisis. Direct association of supposed typical middle Givetian ammonoids, trilobites and corals with upper Givetian marker taxa such as pharciceratids have been found, for example, in Moroccan and French time equivalents of the New York Upper Tully Limestone. The initial and eustatic Taghanic Onlap level is not known to be characterized by the first appearance of any widespread index conodont, goniatite or other taxon. A future upper Givetian substage, therefore, might be based either on the entry of <i>Ozarkodina semialternans</i> or on the first appearance of <i>Schmidtognathus hermanni</i>. The <i>semialternans</i> Zone correlates with a third sedimentary cycle within the Tully Limestone and with the spread of the first Pharciceratidae. Eobeloceratidae (<i>Mzerrebites juvenocostatus</i>) and Archoceratidae n. fam. (<i>Atlantoceras</i>). The (Lower) <i>hermanni</i> Zone is marked by a post-event transgression which led to a significant conodont radiation and to a further diversification of Pharciceratidae and Eobeloceratidae (<i>Mz. erraticus</i>). <br><br> Neue Ammonoideen- und Conodonten-Daten aus Deutschland, Frankreich (Montagne Noire) und aus Südost-Marokko belegen eine komplexe Abfolge sedimentärer Ereignisse und von Faunenwechseln in einem längerfristigen Taghanic-Event-Intervall bzw. einer Taghanic-Biokrise des Givetiums (oberes Mittel-Devon). Direkte Vergesellschaftungen von Ammonoideen, Trilobiten und Korallen, die früher als typische Mittel-Givetium-Formen angesehen wurden, mit Leitformen des Ober-Givetiums (z. B. Pharciceraten) konnten in Marokko und Frankreich in Zeitequivalenten des Oberen Tully-Kalkes von New York nachgewiesen werden. Der initiale und eustatisch bedingte Taghanic Onlap ist bisher nicht durch das Einsetzen eines weit verbreiteten Index-Conodonten, -Goniatiten oder eines Vertreters anderer Fossilgruppen gekennzeichnet. Eine künftige Ober-Givet-Unterstufe sollte daher entweder durch das Einsetzen von <i>Ozarkodina</i> <i>semialternans</i> oder durch das erste Auftreten von <i>Schmidtognathus hermanni</i> definiert werden. Die <i>semialternans</i>-Zone korreliert mit einem dritten Sedimentations-Zyklus im Tully-Kalk und mit der Ausbreitung erster Pharciceratidae, Eobeloceratidae (<i>Mzerrebites juvenocostatus</i>) und Archoceratidae n. fam. (<i>Atlantoceras</i>). Die (Untere) <i>hermanni</i>-Zone ist durch eine Post-Event-Transgression gekennzeichnet, welche eine wichtige Conodonten-Radiation und eine weitere Diversifizierung der Pharciceratidae und Eobeloceratidae (<i>Mz. erraticus</i>) ermöglichte. <br><br> doi:<a href="http://dx.doi.org/10.1002/mmng.20010040107" target="_blank">10.1002/mmng.20010040107</a>

The Middle Devonian (Givetian) ammonoid Pharciceras from the New Albany Shale, Kentucky

2007 ◽  
Vol 81 (6) ◽  
pp. 1510-1515 ◽  
Author(s):  
David M. Work ◽  
Charles E. Mason ◽  
Gilbert Klapper
Keyword(s):  
New York ◽  
North American ◽  
Middle Devonian ◽  
Appalachian Basin ◽  
Rhenish Massif ◽  
Southern France ◽  
Ancestral Species ◽  
New Albany Shale ◽  
Montagne Noire ◽  
New Evidence

Pharciceras Hyatt, 1884 is the diagnostic ammonoid of the late middle Givetian Stage of the Middle Devonian Series. It occurs in the Rhenish Massif in Germany, the Montagne Noire in southern France, and in equivalent strata in the Anti-Atlas in southern Morocco. Verified North American occurrences of Pharciceras are confined to the New York succession, where the appearance of the ancestral species P. amplexum (Hall, 1886) in the Upper Tully Limestone represents an important and well-established biostratigraphic datum within the Taghanic onlap interval (see Aboussalam and Becker, 2001 for discussion). In this note we describe a second, distinctly younger, North American species, Pharciceras barnetti n. sp., from the New Albany Shale in eastcentral Kentucky that provides new evidence on the Taghanic onlap interval (Upper Tully/Geneseo Sequence of Baird and Brett, 2003) in the central Appalachian Basin. This occurrence is particularly significant because of its association with conodonts that provide a basis for refined correlations between the central Appalachian Basin and the Taghanic onlap succession in New York.

The Late Devonian ammonoid subfamily Paratornoceratinae

2020 ◽  
Vol 297 (3) ◽  
pp. 245-285
Author(s):  
Dieter Korn ◽  
Konrad Bartzsch ◽  
Stella Zora Buchwald ◽  
Volker Ebbighausen ◽  
Dieter Weyer
Keyword(s):  
New Species ◽  
Western Australia ◽  
Endemic Species ◽  
Late Devonian ◽  
Canning Basin ◽  
Wide Range ◽  
Shelf Sediments ◽  
Stratigraphic Succession

Ammonoids of the subfamily Paratornoceratinae are characterised by disc-shaped adult conchs; furthermore they display a wide range of ontogenetic pathways leading to a similar adult conch morphology. The subfamily Paratornoceratinae occurs in the late early Famennian shelf sediments of various regions from the Anti-Atlas of Morocco to the Canning Basin of Western Australia; where endemic species of the genera Paratornoceras and Acrimeroceras appear in stratigraphic succession. We revise the species Paratornoceras lentiforme (Sandberger, 1857) and describe the new species Paratornoceras thuringense Korn, Bartzsch & Weyer n. sp., P. harounense Korn & Ebbighausen n. sp., P. ayense Korn & Buchwald n. sp., P. peterseni Korn & Buchwald n. sp., Acri meroceras hoppeckense Korn & Buchwald n. sp., A. ropicense Korn, Bartzsch & Weyer n. sp. and A. saalense Korn, Bartzsch & Weyer n. sp.

Speech-Language Pathologists' Perceptions of Their Preparation and Confidence for Providing Dysphagia Services

2020 ◽  
Vol 5 (6) ◽  
pp. 1666-1682
Author(s):  
Lena G. Caesar ◽  
Merertu Kitila
Keyword(s):  
Service Delivery ◽  
Graduate School ◽  
Online Survey ◽  
The United States ◽  
Academic Preparation ◽  
Speech Language Pathologists ◽  
Confidence Levels ◽  
Graduate School Preparation ◽  
Graduate Preparation ◽  
Significant Relationships

Purpose The purpose of this study was to investigate the perceptions of speech-language pathologists (SLPs) regarding their academic preparation and current confidence levels for providing dysphagia services, and the relationship between their perceptions of graduate school preparation and their current levels of confidence. Method This study utilized an online survey to gather information from 374 American Speech-Language-Hearing Association–certified SLPs who currently provide dysphagia services in the United States. Surveys were primarily distributed through American Speech-Language-Hearing Association Special Interest Group forums and Facebook groups. The anonymous survey gathered information regarding SLPs' perceptions of academic preparation and current confidence levels for providing dysphagia services in 11 knowledge and skill areas. Results Findings indicated that more than half of respondents did not feel prepared following their graduate academic training in five of the 11 knowledge and skill areas related to dysphagia service delivery. However, about half of respondents indicated they were currently confident about their ability to provide services in eight of the 11 knowledge and skill areas. Findings also indicated that their current confidence levels to provide dysphagia services were significantly higher than their perceptions of preparation immediately following graduate school. However, no significant relationships were found between respondents' self-reported current confidence levels and their perceptions of the adequacy of their academic preparation. Conclusions Despite SLPs' low perceptions of the adequacy of their graduate preparation for providing dysphagia services in specific knowledge and skill areas immediately following graduation, they reported high confidence levels with respect to their actual service delivery. Implications of these findings are discussed.

Gerald H. Thayer's ornithological work in St Vincent and the Grenadines, Lesser Antilles

2018 ◽  
Vol 45 (1) ◽  
pp. 21-39 ◽  
Author(s):  
James W. Wiley
Keyword(s):  
New York ◽  
New York City ◽  
West Indies ◽  
The United States ◽  
Lesser Antilles ◽  
American Museum ◽  
The West ◽  
Comparative Zoology ◽  
North And South America ◽  
North And South

Gerald Handerson Thayer (1883–1939) was an artist, writer and naturalist who worked in North and South America, Europe and the West Indies. In the Lesser Antilles, Thayer made substantial contributions to the knowledge and conservation of birds in St Vincent and the Grenadines. Thayer observed and collected birds throughout much of St Vincent and on many of the Grenadines from January 1924 through to December 1925. Although he produced a preliminary manuscript containing interesting distributional notes and which is an early record of the region's ornithology, Thayer never published the results of his work in the islands. Some 413 bird and bird egg specimens have survived from his work in St Vincent and the Grenadines and are now housed in the American Museum of Natural History (New York City) and the Museum of Comparative Zoology (Cambridge, Massachusetts). Four hundred and fifty eight specimens of birds and eggs collected by Gerald and his father, Abbott, from other countries are held in museums in the United States.

The “Japanese Turn” in Fine Dining in the United States, 1980–2020

2020 ◽  
Vol 20 (2) ◽  
pp. 45-54
Author(s):  
Samuel H. Yamashita
Keyword(s):  
United States ◽  
New York ◽  
Los Angeles ◽  
San Francisco ◽  
San Francisco Bay Area ◽  
The United States ◽  
First Century ◽  
Further Training ◽  
Bay Area ◽  
Wide Acceptance

In the 1970s, Japanese cooks began to appear in the kitchens of nouvelle cuisine chefs in France for further training, with scores more arriving in the next decades. Paul Bocuse, Alain Chapel, Joël Robuchon, and other leading French chefs started visiting Japan to teach, cook, and sample Japanese cuisine, and ten of them eventually opened restaurants there. In the 1980s and 1990s, these chefs' frequent visits to Japan and the steady flow of Japanese stagiaires to French restaurants in Europe and the United States encouraged a series of changes that I am calling the “Japanese turn,” which found chefs at fine-dining establishments in Los Angeles, New York City, and later the San Francisco Bay Area using an ever-widening array of Japanese ingredients, employing Japanese culinary techniques, and adding Japanese dishes to their menus. By the second decade of the twenty-first century, the wide acceptance of not only Japanese ingredients and techniques but also concepts like umami (savory tastiness) and shun (seasonality) suggest that Japanese cuisine is now well known to many American chefs.

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