New ommatids of Ommatinae(Coleoptera:Archostemata:Ommatidae)from the Yixian Formation of western Lia

• 作 者: Shih Chung Kun
• 机 构: Key Laboratory of Insect Evolution & Environment Change College of Life Science,Capital Normal Unive
• 出 处: Progress in Natural Science
• 发表日期: 2007年07期
• 关键词: Liaoning Coleoptera migration fossil extant tribe preliminary briefly visible re

Four new fossil species of the family Ommatidae from the Yixian Formation of western Liaoning,China are described. Two of them belong to tribe Brochocoleini:Brochocoleus sulcatus sp.nov.and Brochocoleus angustus sp.nov.The other two refer to tribe Ommatini:Cionocoleus planiusculus sp.nov.and Cionocoleus cervicalis sp.nov.The diagnosis of Brochocoleus and Cionocoleus, respectively,are revised.A preliminary analysis of geographical distribution suggests a possible migration pathway of the genus Bro- chocoleus.The relationship between the genus Cionocoleus and the extant family Crowsoniellidae is briefly discussed.

Four new fossil species of the family Ommatidae from the Yixian Formation of western Liaoning, China are described. Two of them belong to tribe Brochocoleini: Brochocoleus sulcatus sp.nov.and Brochocoleus angustus sp. Nov. The other two to tribe Ommatini: Cionocoleus planiusculus sp. nov. and Cionocoleus cervicalis sp. nov. respectively. The diagnosis of Brochocoleus and Cionocoleus, respectively, were revised. A preliminary analysis of geographical distribution suggests a possible migration pathway of the genus Bro- chocoleus. The relationship between the genus Cionocoleus and the extant family Crowsoniellidae is briefly discussed.