Notes on the Intestinal Convolution of the Fishes of the Pomacentridae (Perciformes)

抄録

Abstract The re-examination on the intestinal convolution of pomacentrid fishes including 10 genera and 32 species were carried out as the first step in the anatomical comparison of the two tax-onomic groups, the pomacentrids and cichlids.The results obtained are shown as follows: 1) The observation on a substantial number of specimens in Chromis notatus revealed that the species has a specific intestinal type only with few individual variations, convincing the specificity of intestinal type in this group of fish;2) In the fishes of Abudefduf vaigiensis and Actinicola percula, the specific intestinal type is completed at 6.1 cm (S.L.) in the former and 4.6 cm in the latter;3) Four distinct intestinal types are found among the pomacentrids examined;4) These four types, though different in the complexity of coiling, are somewhat similar to those of the cichlids.