Eigenshape Analysis of a Cut-Grow Mapping for Triangles, and Its Application to Phyllotaxis in Plants

1991 ◽  
Vol 51 (3) ◽  
pp. 775-798 ◽  
Author(s):  
Colin Goodall
Keyword(s):  
Eigenshape Analysis

Eigenshape Analysis of Left Ventricular Outlines from Contrast Ventriculograms

1996 ◽  
pp. 211-233 ◽  
Author(s):  
Paul D. Sampson ◽  
Fred L. Bookstein ◽  
Florence H. Sheehan ◽  
Edward L. Bolson
Keyword(s):  
Left Ventricular ◽  
Eigenshape Analysis

scholarly journals Speciation and structural evolution in the Palaeocene <i>Morozovella</i> lineage (planktonic Foraminiferida)

1988 ◽  
Vol 7 (1) ◽  
pp. 59-72 ◽  
Author(s):  
R. M. Corfield ◽  
A. H. Granlund
Keyword(s):  
Species Differences ◽  
Shape Change ◽  
Structural Evolution ◽  
Species Selection ◽  
Size Change ◽  
North West ◽  
Eigenshape Analysis ◽  
Mean Size ◽  
The Mean ◽  
Marine Productivity

Abstract. The Palaeocene members of the planktonic foraminiferal genus Morozovella evolve through a series of intermediate morphologies from the globigerine ancestral species Subbotina pseudobulloides to the angulo-conical globorotaliid species Morozovella velascoensis. This example of structural evolution is investigated using eigenshape analysis on 41 samples from DSDP Site 577 (Shatsky Rise, North-West Pacific). The results indicate that the initial members of this lineage (S. pseudobulloides to M. angulata forma protocarina) exhibit a directional shape trend whereas, subsequent to the evolution of M. velascoensis, shape fluctuations are random. The interval of maximum shape change in this lineage is accompanied by an increase in the mean size of its members. Both the shape and size change occur during the peak in speciation of the Palaeocene morozovellids (at 63Ma), a phenomenon that we interpret as an example of species selection. This interval is also characterised by high levels of marine productivity, a factor considered instrumental in the control of the evolution of the Palaeocene Morozovella species.The potential of eigenshape analysis as a taxonomic aid is also investigated. Specimens mounted in side view are insignificantly different until the evolution of the late stage morozovellids M. angulata forma protocarina, M. velascoensis, M. occlusa and M. edgari in the Late Palaeocene. This suggests that the shape of the edge view of Palaeocene morozovellids is not a good measure of real species differences.

Eigenshape analysis of ammonoid sutures

Lethaia ◽  
2009 ◽  
Vol 43 (2) ◽  
pp. 266-277 ◽  
Author(s):  
TAKAO UBUKATA ◽  
KAZUSHIGE TANABE ◽  
YASUNARI SHIGETA ◽  
HARUYOSHI MAEDA ◽  
ROYAL H. MAPES
Keyword(s):  
Eigenshape Analysis

scholarly journals Ontogenetic changes in the ostracod <i>Cytherella</i> cf. <i>ovata</i> Roemer, from the Cenomanian of Algeria

1990 ◽  
Vol 9 (1) ◽  
pp. 37-44 ◽  
Author(s):  
Stefan Majoran
Keyword(s):  
Growth Rate ◽  
Seasonal Variation ◽  
Linear Regression ◽  
Single Sample ◽  
Growth Stages ◽  
Ontogenetic Changes ◽  
Eigenshape Analysis ◽  
Size Growth ◽  
The Relationship ◽  
Northeastern Algeria

Abstract. about 200 right valves of Cytherella cf. ovata Roemer, were selected from a single sample of Cenomanian age (northeastern Algeria). The material can be subdivided into two parallel ontogenetic series which were quantitatively investigated by linear regression and eigenshape analysis. The corresponding growth stages of the two series are differentiated by size, growth rate, and, to a lesser extent, by shape. The relationship between the two series are discussed mainly in terms of seasonal variation in the environment.

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