複合ホヤPolyandrocarpa misakiensisの前断片の癒合による重複個虫

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  • Double-Zooid Monsters Derived From the Fusion of Two Anterior Halves in the Compound Ascidian, Polyandrocarpa misakiensis

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Abstract

Fragments of zooid of the compound ascidian, Polyandrocarpa misakiensis, have the capacity for morphallactic regeneration. If two anterior fragments were fused together at their cut surfaces, double-zooid monsters were produced, each regenerating the posterior part at the fusion area. On the basis of the morphology of regenerated organs, the monsters were divided into 4 types. Latitudinal and longitudinal positional values were given to a zooid. Thus, the position of each organ was represented by the coordinate. Application of the coordinate to the monsters revealed that 4 types of the monsters may be resulted from the quantitative difference within longitudinal positional values.

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