多変量解析による天草産 Notoacmea 属の殻形態の研究

概要

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Shell shape variations in five "species" of Notoacmea (N. c. radula, N teramachii, N. nigrans, N. schrenckii, and N. fuscoviridis) were examined. Species-wise regression analysis could only separate N. nigrans and N. schrenckii. Two dimensional scattergrams obtained by the principle component analysis and the canonical variate analysis showed a better separation than the regression analysis in spite of the considerable overlapping of N. fuscoviridis, N. teramachii and N. nigrans. Multiple discriminant analysis yielded 92.4% accurate classification. Among the five shell characters, thickness and height of apex are found to be important for the discrimination. These multivariate analyses of shell morphology support the hypothesis that these five "species" of Notoacmea are distinct species.
日本貝類学会の論文
1992-09-30