Morphometric study of the genus Ancyrodelloides (Lower Devonian, conodonts), central Nevada

1987 ◽  
Vol 61 (3) ◽  
pp. 583-594 ◽  
Author(s):  
Michael A. Murphy ◽  
M. Kemal Cebecioglu
Keyword(s):  
Lower Devonian ◽  
Statistical Evaluation ◽  
Morphometric Study ◽  
As Species ◽  
Biostratigraphic Units

This paper presents a morphometric study of the conodont genus Ancyrodelloides. It is one of a series of such papers whose goal is to increase the precision of correlation within the Lower Devonian by refining the taxonomic basis of its biostratigraphic units. Ancyrodelloides species are confined to the delta Zone and may be used to divide it into three parts. Morphometrics verify the species rank of A. eleanorae, A. limbacarinatus, A. trigonicus, and A. transitans. Ancyrodelloides delta and A. omus are retained as species on qualitative grounds, but need larger samples for statistical evaluation. Ancyrodelloides asymmetricus and A. kutscheri are classified as varieties, but lack adequate samples.

Morphometric study of the platform elements of Amydrotaxis praejohnsoni n. sp. (Lower Devonian, conodonts, Nevada)

1989 ◽  
Vol 63 (3) ◽  
pp. 349-355 ◽  
Author(s):  
Michael A. Murphy ◽  
Kathleen B. Springer
Keyword(s):  
Lower Devonian ◽  
Morphological Changes ◽  
Morphometric Study ◽  
Mosaic Pattern ◽  
Basal Cavity

The platform element of the conodont Amydrotaxis praejohnsoni n. sp. shows statistically significant morphological changes from the base to the top of the delta Zone (Lower Devonian). The changes occur particularly in mean denticle number, height and character of the anterior denticles, and shape of the basal cavity. The earliest forms have fewer denticles ( = 7.1), an enlarged, high anterior denticle, and a broadly flared posterior basal cavity, whereas late forms have more denticles ( = 9.4), equal-sized anterior denticles, and a narrow posterior basal cavity. There is no stasis phase in the species history, but rather a mosaic pattern in which the observed changes in the character states are seemingly independent of each other and proceed at variable rates.

Statistical evaluation of medical journal manuscripts

JAMA ◽  
1966 ◽  
Vol 195 (13) ◽  
pp. 1123-1128 ◽  
Author(s):  
S. Schor
Keyword(s):  
Medical Journal ◽  
Statistical Evaluation

Minimizing Septectomy for Endoscopic Transphenoidal Approaches to the Sellar and Suprasellar Regions: A Cadaveric Morphometric Study

2014 ◽  
Vol 75 (S 01) ◽  
Author(s):  
H. Garcia ◽  
M. Pyfer ◽  
S. Singhal ◽  
M. Otten ◽  
A. Iloreta ◽  
...  
Keyword(s):  
Morphometric Study

The Physician’s Task and the Problem of Documentation

1964 ◽  
Vol 03 (01) ◽  
pp. 11-19 ◽  
Author(s):  
A. Proppe
Keyword(s):  
Statistical Evaluation ◽  
Age Groups ◽  
Diagnostic Methods ◽  
Early Age ◽  
Case Histories ◽  
Lupus Vulgaris ◽  
Pathological Conditions ◽  
Clinical Methods ◽  
Corpus Hippocraticum ◽  
High Degree

SummaryCase histories suitable for statistical evaluation can be found even as far back as in the Corpus Hippocraticum. Such simple data as the patient’s age, body weight, size, the date of menarche, etc. are practically always included in the case records, and it is demonstrated that, when such data are recorded in a system of documentation suitable for mechanical sorting, it may enable us to draw conclusions of very great importance. Mechanical registration methods have revealed that, in the determination and recording of data as hitherto carried out. there has been a surprisingly large number of errors and a high degree of unreliability. This view has a considerable influence on modern clinical methods; it renders a more democratic relation between physician and patient necessary and makes clear the need for measures to enhance the reliability of diagnosis and treatment of pathological conditions. The author illustrates this view with reference to the mechanical falsification of the thesis of the proneness of early age groups to lupus vulgaris, furthermore with reference to the mechanical rationalization of modern routine diagnostic methods, to the constant surveillance of adverse effects on public health and to the protection against allergic reactions with the aid of recording systems of personal allergy and intolerance data with mechanical sorting and computer techniques.

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