河北早白垩世一个新科大鞘甲科——Magnocoleidaefam.nov.(Insecta:Coleoptera)

A NEW EARLY CRETACEOUS BEETLE FAMILY——MAGNOCOLEIDAE FAM.NOV.(INSECTA: COLEOPTERA) IN HEBEI PROVINCE

依据鞘翅的纵脉及其多而不规则的翅室等特征，建立了一个新的大鞘甲科———Ｍａｇｎｏｃｏｌｅｉｄａｅｆａｍ．ｎｏｖ．。化石采自河北省张家口市黄家堡青石砬组，系卢尚坟昆虫群区系范围，时代归早白垩世。

The specimens of a new family, Magnocoleidae fam.nov.,were collected from the white and greyish white mudstone of the Qingshila Formation at Huangjiapu near the Nantianmen village of Zhangjiakou City in Hebei Province and referred to the Lushangfen Entomofauna, belonging to the late early stage of Early Cretaceous (K 1-2 1) in age and correlated with the European Hauterivian Barremian. The new family, Magnocoleidae fam.nov.(Insecta: Coleoptera), is named and described in the paper and deposited in the Beijing Natural History Museum. Its elytra is 34mm long and 12 2mm wide. It is marked with seven longitudinal veins: Sc, Rs, M 1, M 2, Cu, A 1 and A 2, in which Sc is very long and arched, Rs straight, its terminal closed at the elytral end, M 1 connected with M 2 at lower part of the elytra, the stem of M 1+M 2 run to elytral end, Cu straight, A 1 short and oblique and A 2 very long and straight. There are 3 to 6 rows of irregular and well developed elytral cells between two longitudinal veins, especially 5 6 rows of the cells at M 1 Cu area are characterized for this family. All cells disappear at elytral base and they are replaced by long and narrow nodules. Elytra completely fusiform at its apex. This family resembles Permian Tshekardocoleidae, Asiocoleidae, Sojanocoleidae, Permarrphidae, Permocupedidae, Kaltanocoleidae, Triassic Jurassic Tricoleidae and recent Cupedidae, especially Asiocoleidae having the development of cells, but it differs from them in having more developed, dense and irregular cells between two longitudinal veins (3 6 rows, usually 5 6 rows of the cells), long and undulate nodules instead of the cells at the elytral base and completely fusiform elytra at apex. This family includes a genus ( Magnocoleus gen. nov.) and species ( Magnocoleus huangjiapuensis sp.nov.).