1. The structure of the skin of the spiny-headed wormEchinorhynchus gadi resembles the one of the rotiferBrachionus calyciflorus and is in sharp contrast to that of the cestodes which are also intestinal parasites and do not possess an alimentary canal, too.

Damit steht dieser darmlose Endoparasit in scharfem Gegensatz zu den sich ebenfalls parenteral ernährenden Cestoden.