白垩纪缅甸琥珀中小型花蚤一新种(鞘翅目:花蚤科)及对花蚤科的分类学修订

A NEW SMALL-BODIED MORDELLID BEETLE(COLEOPTERA:MORDELLIDAE)FROM MID-CRETACEOUS BURMESE AMBER AND TAXONOMIC REVISION

根据产自缅甸北部白垩纪中期克钦琥珀中的一块小型花蚤化石标本,建立1新种--小多刺花蚤(Multispinus parvus sp.nov.),归于花蚤科(Mordellidae)。同时,对缅甸琥珀中已发现的花蚤和泛花蚤进行了重新观察和研究,重点分析了其形态学特征并认真考虑了相关分类学依据,将短尾花蚤科(Apotomouridae)修订为花蚤科之下的短尾花蚤亚科(Mordellidae:Apotomourinae)。短尾花蚤中普遍存在的臀锥完全不发育,不可作为区分于花蚤科的衍征。白垩纪中期琥珀中发现的花蚤化石类群体型均小,这也许与白垩纪中期生态环境和栖息地被子植物花朵形态有关。

A new small-bodied beetle,Multispinus parvus sp.nov.,is described from the mid-Cretaceous Burmese amber and assigned to Mordellidae(Coleoptera:Tenebrionoidea).Based on a careful re-examination of the Mordellidae and mordellid-like beetles from the Burmese amber and analysis of their morphological characters,the family Apotomouridae is reduced herein to a subfamily of Mordellidae as Apotomourinae.The absence of a pygidium in Apotomourinae cannot be regarded as a synapomorphy.All known mordellids found in the mid-Cretaceous ambers are all small in size,which may be related to the mid-Cretaceous ecological environment and the early angiosperm flower morphology in their habitat.