摘要
A new genus Amblomma gen. nov. of fossil beetles is erected and can be assignedto the family Ommatidae because its two procoxal cavities are contiguous and the articulations of the abdominal ventrites are abutting. The new genus is similar to Zygadenia Handlirsch, 1906 (=Notocupes Ponomarenko, 1964), Tetraphalerus Waterhouse, 1901,Rhobdocupes Ponomarenko, 1966 and Sinocupes Lin, 1976, but can be distinguished from other genera according to the following characters: the second segment of antennae is shorterthan the third one in length; the posterior tarsi with the basal segment is obviously shorter than the three following taken together in length; the antennae reach the posterior ridge of prothroax in length, and the sides of the prothroax with serrulate margin. Four new species of the new genus are described and figured: Amblomma psilata gen. et sp. nov., Amblomma rudis gen. et sp. nov., Amblomma epicharis gen. et sp. nov., and Amblomma stabilis gen. etsp. nov. A key to species within this new genus is provided. All the specimens are collected from the Late Jurassic Yixian Formation of western Liaoning and are now housed in the College of Life Science, Capital Normal University, Beijing, China.
A new genus Amblomma gen. nov. of fossil beetles is erected and can beassigned to the family Ommatidae because its two procoxal cavities are contiguous and thearticulations of the abdominal ventrites are abutting. The new genus is similar to ZygadeniaHandlirsch, 1906 (= Notocupes Ponomarenko, 1964), Tetraphalerus Waterhouse, 1901, RhobdocupesPonomarenko, 1966 and Sinocupes Lin, 1976, but can be distinguished from other genera according tothe following characters: the second segment of antennae is shorter than the third one in length;the posterior tarsi with the basal segment is obviously shorter than the three following takentogether in length; the antennae reach the posterior ridge of prothroax in length, and the sides ofthe prothroax with serrulate margin. Four new species of the new genus are described and figured:Amblomma psilata gen. et sp. nov., Amblomma rudis gen. et sp. nov., Amblomma epicharis gen. et sp.nov., and Amblomma stabilis gen. et sp. nov. A key to species within this new genus is provided. Allthe specimens are collected from the Late Jurassic Yixian Formation of western Liaoning and are nowhoused in the College of Life Science, Capital Normal University, Beijing, China.
