作者：刘宪亭 王念忠

摘要：Numerous specimens of sticklebacks described here as a new species (P. nilaowanexsis sp. nov.) were collected from the lower part of the Nihowan Formation by Mr. T. Y. Wang and others. These specimens represent the first discovery of fish-remains from this formation, formerly well known by the abundance of fossil mammals (from the upper part).The outline of this little fish，the structures of skull and mouth, opercular region, pectoral and pelvic arches are all as in Pungitius Costa. In several points this fish is very similar to those of Pungitius sinensis (Guichenot)，still living in North China today. But it differs from the latter by the shape of lateral bony scutes and the structure of pelvic arch (ventral plate and ventral spine). Based on the lithological and paleontological evidences, it is inferred that the lower part of this formation is of lacustrine origin and probably late Pliocene in age.

卷期：12卷 02期

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