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Morphometric analysis of character v...

Foottit, Robert George.

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Morphometric analysis of character variation and taxonomic discrimination among a complex of species of the genus Cinara (Homoptera: Aphidoidea: Lachnidae).

Record Type:	Electronic resources : Monograph/item
Title/Author:	Morphometric analysis of character variation and taxonomic discrimination among a complex of species of the genus Cinara (Homoptera: Aphidoidea: Lachnidae)./
Author:	Foottit, Robert George.
Notes:	Source: Dissertation Abstracts International, Volume: 50-04, Section: B, page: 1225.
Contained By:	Dissertation Abstracts International50-04B.
Subject:	Biology, Entomology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NL48725
ISBN:	0315487259

Morphometric analysis of character variation and taxonomic discrimination among a complex of species of the genus Cinara (Homoptera: Aphidoidea: Lachnidae).
Foottit, Robert George.

Morphometric analysis of character variation and taxonomic discrimination among a complex of species of the genus Cinara (Homoptera: Aphidoidea: Lachnidae).

Source: Dissertation Abstracts International, Volume: 50-04, Section: B, page: 1225.

Thesis (Ph.D.)--Simon Fraser University (Canada), 1988.

Morphological variation among the species of a taxonomic complex of aphids of the genus Cinara Curtis (Homoptera: Aphidoidea: Lachnidae) on western North American pines was studied using techniques of univariate and multivariate statistical analysis. This morphometric approach was used to describe trends in variation, to establish species boundaries, and to test the discriminatory ability of a set of morphological characters.

ISBN: 0315487259Subjects--Topical Terms:

1018619
Biology, Entomology.

Morphometric analysis of character variation and taxonomic discrimination among a complex of species of the genus Cinara (Homoptera: Aphidoidea: Lachnidae).
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035 $a (UnM)AAINL48725
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040 $a UnM $c UnM
100 1 $a Foottit, Robert George. $3 1927844
245 1 0 $a Morphometric analysis of character variation and taxonomic discrimination among a complex of species of the genus Cinara (Homoptera: Aphidoidea: Lachnidae).
500 $a Source: Dissertation Abstracts International, Volume: 50-04, Section: B, page: 1225.
500 $a Supervisor: M. Mackauer.
502 $a Thesis (Ph.D.)--Simon Fraser University (Canada), 1988.
520 $a Morphological variation among the species of a taxonomic complex of aphids of the genus Cinara Curtis (Homoptera: Aphidoidea: Lachnidae) on western North American pines was studied using techniques of univariate and multivariate statistical analysis. This morphometric approach was used to describe trends in variation, to establish species boundaries, and to test the discriminatory ability of a set of morphological characters.
520 $a Within-sample and between-sample variation of a single species, C. nigra (Wilson), was characterized first. Correlation analysis and principal component analysis of a suite of 52 characters in one sample and 32 characters in 19 geographic samples of this species revealed the presence of components of variation other than just size variation. Geographic variation in the 19 population samples was analyzed using discriminant function analysis. Variation in the magnitude and composition of the main components of variation within the between samples was demonstrated.
520 $a Morphometric trends within 9 species of Cinara were characterized by the use of principal component analysis. Patterns of morphometric variation were shown to be complex and unique for many species; functional groups of characters exhibited different internal relationships and different degrees of association with the main components of variation. Information on the covariation among the characters studied was used to select a set of characters for discrimination among the species of Cinara. Discriminant function analysis and cluster analysis of Mahalanobis Generalized Distances were used to establish species boundaries among samples of the 9 species and to identify those variables which discriminated best between the species. It was shown that nearly one half of the 32 variables used were necessary to discriminate between the species; these variables were from all of the functional groups of characters.
520 $a Descriptive and distributional information and a taxonomic key to the species of Cinara on lodgepole pine (Pinus contorta Douglas ex Laudon) were developed. Extensive geographic sampling allowed for an interpretation of the distributions and hostplant preferences of these species to be made within the context of the systematic relationships of North American pines.
520 $a The application of multivariate morphometries of Cinara taxonomy in particular and to aphid biosystematics in general is discussed, including the potential contribution of this approach to the phylogenetic reconstruction of the aphidoidea.
590 $a School code: 0791.
650 4 $a Biology, Entomology. $3 1018619
690 $a 0353
710 2 0 $a Simon Fraser University (Canada). $3 1020621
773 0 $t Dissertation Abstracts International $g 50-04B.
790 1 0 $a Mackauer, M., $e advisor
790 $a 0791
791 $a Ph.D.
792 $a 1988
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NL48725