[Histological and histochemical studies on the detection of the esogaster in the agastric cyprinidae Aristichthys nobilis Rich. (Marble carp)].

In postnatal Aristichthys nobilis Rich. oesogaster was proved by histological and histochemical methods. During the larval development oesogaster becomes reduced completely in cranial direction. The statement is demonstrating the secondary character of lost stomach in phylogeny of this fish species.