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The tunicates - aspects of their threefoldness

The concept of threefoldness (sense-nerve system, metabolic system, rhythmic system) is applied to the hermaphroditic tunicates with their classes Appendicularia, Thaliacea, and Ascidia.

Ascidians are sessile organisms with a tadpole-like free-swimming larvae but often with a purely… Read More

Wing pattern; ofbutterflies (Lepidoptem) as mirrors ofenvironmental colours and light

Research in the tropics of the southern continents as well as in the temperate regions during the last decades has reve.tled the intimate correlatiun of wing colourstion and Wing pattern in butterflies with the corresponding features of their… Read More