A New Genus of Paleonisciformes from the Early Cretaceous Longjiang Formation in Heilongjiang Province, China

作者：Wang Xuri; Tan Kai^*; Lu Liwu; Li Tao; Cai Qingqing

来源：Acta Geologica Sinica, 2018, 92(3): 889-896.

DOI：10.1111/1755-6724.13580

• Paleonisciformes
• Early Cretaceous
• Longjiang Formation
• northeastern China

We report a new genus and species of Paleonisciformes-Cretolepis dongbeiensis gen. et sp. nov., from the Early Cretaceous Longjiang Formation in Qiqihar City, Heilongjiang Province. The new materials can be distinguished from other Paleonisciformes genera by possessing the following characteristics: a sclerotic ring composed of more than five small bones; three pieces of suborbitals; one dermohyomandibular; a jaw hanging apparently inclined anteriorly; long and tall horizontal branch of the preopercular, a short vertical branch, with the angle formed by the two branches slightly higher than 90 degrees; a triangular dorsal fin in the middle point between the pelvic and anal fins. The discovery of Mesozoic Paleonisciformes in northeastern China adds to the biodiversity and geographic distribution of Paleonisciformes.

• 出版日期2018-6
• 单位吉林大学; 中国地质博物馆; 中国地质科学院