Die Entwicklung der Larven bei der Bandwurmordnung Tetraphyllidea Braun 1900

Reichenbach-Klinke, Heinz-Hermann

The development of the larval stages of the Tetraphyllidean tapeworms is widely unknown. It is therefore tried to persue the cycle for the species Acanthobothrium coronatum (Rudolphi), a common tapeworm of the dogfish (Scylliorhinus canicula Cuv.) and some other sharks and skates. In 100 examined pilchards and anchovies numerous individuals of the so-called "Scolex pleuronectis Müller", a plerocerous Tetraphyllidean-larva, are found. The infected clupeids were fed to isolated sharks, which, finally opened, contained nothing but hundreds of the aboven nominated parasite. The way of the youngest stages is described. A coracid is not yet found but a small plerocercoid "Scolex" in copepodes. The development therefore seems to run about a first host, a copepode, which is eaten by the second, a teleostean pelagically living fish, which itself is devoured by a rapacious fish, mostly a shark, the definitive host, in other cases by another teleostean fish or a cephalopod, but these do nothing than "transport" the "Scolex" into the only definitive host, a shark or skate.

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Reichenbach-Klinke, Heinz-Hermann: Die Entwicklung der Larven bei der Bandwurmordnung Tetraphyllidea Braun 1900.

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