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Zur Augenentwicklung Von Porcellio Scaber

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1. The morphogenesis of the complex eye of Porcellio scaber shows a gradient of differentiation in a caudal-cranial direction. 2. The starting point for this gradient of differentiation is a single ommatidium in the second row of the complete eye, which is already visible in young animals still in the amnion. 3. New ommatidia are formed at intervals, usually two ommatidia at a time. 4. Knowledge of the stages of ommatidial development of Porcellio scaber permits an approximate determination of age for the first five-and-a-half months post natum.

Affiliations: 1: Aus dem Zoologischen Staatsinstitut und Zoologischen Museum Hamburg


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