A new subfamily of cretaceous antlike stone beetles (Coleoptera: Scydmaenidae: Hapsomelinae) with an extra leg segment
A new subfamily of cretaceous antlike stone beetles (Coleoptera: Scydmaenidae: Hapsomelinae) with an extra leg segment
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发表时间：
2004
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通讯作者：
G. Poinar;A. Brown
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作者：
G. Poinar;A. Brown
描述了采自白垩纪缅甸琥珀中的一新亚科、新属、新种（鞘翅目：石甲科：石甲亚科：缅甸石甲）。化石的前腿包含一个髌骨，这是新亚科的主要特征。髌骨被认为是功能形态的一个例子，可能是用来捕捉和/或按住猎物，可能是螨，因为这个家族的所有现存成员都是螨的捕食者。这一特征似乎是蚂蚁石甲虫这一分支所特有的，因为该家族的其他成员（已灭绝或现存）都没有髌骨。H. Burmitis是腹部延长和细长的强烈硬化的产卵器，从而允许卵插入裂缝或软组织。讨论了这组甲虫多腿节的意义和发生与古生代昆虫和现代节肢动物的关系。
A new subfamily, genus, and species of antlike stone beetles (Coleoptera: Scydmaenidae: Hapsomelinae: Hapsomela burmitis) are described from Cretaceous Burmese amber. The forelegs of the fossil contain a patella, the major character on which the new subfamily is based. The patella is regarded as an example of functional morphology and probably served in the capacity of catching and/or holding down prey, probably mites, since all extant members of this family are mite predators. This character appears to have been specific to this clade of antlike stone beetles, since no other members (extinct or extant) of the family have a patella. Another unusual character of H. burmitis is the extended abdomen and elongate strongly sclerotized ovipositor, thus allowing eggs to be inserted into cracks or soft tissue. The significance and occurrence of the extra leg segment in this group of beetles is discussed in relation to Paleozoic insects and modern arthropods.